author | Claus Gittinger <cg@exept.de> |
Tue, 07 Nov 2006 14:00:21 +0100 | |
changeset 10156 | d35f30a7fde5 |
parent 9271 | 6be3fa0ab53d |
child 10776 | 27ebdc435f1f |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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Object subclass:#Signal |
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instanceVariableNames:'mayProceed notifierString nameClass message handlerBlock parent' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Kernel-Exceptions' |
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! |
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!Signal class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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||
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documentation |
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" |
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Note: |
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The instance based Signal framework is being replaced by class based exceptions. |
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I.e. what used to be instances of Signal/QuerySignal is beeing |
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rewritten into subclasses of Exception/Error/Query and Warning. |
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Although the functionality is basically unchanged, the new |
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class based exceptions are easier to instanciate (no need for |
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creation in a classes initialize method), easier to use (no real |
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need for Signal-constant accessors) and allow for easier parameter |
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passing (not only a single parameter, but allows for individual |
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exception subclasses to add additional state). |
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However, the old Signal hierarchy will remain in existance, since it allows |
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funny instance-specific and anonymous exception handling schemes to be |
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implemented, which are hard to built using class-based exceptions. |
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Signal and Exception provide a framework for exception handling. |
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A Signal object is usually defined somewhere up in the calling chain |
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and associated with some abnormal event. Many signals are also |
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created at startup time and reused. |
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When the event is raised (by Signal>>raise) the control will be either |
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given to a debugger or - if a handler was defined - to the handler. |
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The handler will get a description of what (and where) happened in an |
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Exception object and can decide how to react on the situation (i.e. |
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proceed, return or restart). |
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There is also a companion class called SignalSet, which allows handling |
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multiple signals with one handler (for example all arithmetic signals). |
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And, finally there is a very special SignalSet which allows catching |
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any signal (SignalSet>>anySignal). |
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Since there is no official documentation on signal handling (i.e. none |
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of the books describes it), this Signal implementation has been modeled |
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after what some PD programs seem to expect and what alpha/beta testers told |
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me it should look like. |
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It may not be perfect and undergo minor changes. |
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special: |
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In addition to the nested catch & throw mechanism, signals can also be |
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used when no such handler scope exists. To support this, signals can be |
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assigned a handlerBlock, which gets evaluated with the exception as argument |
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in case no handler was found (on the stack). |
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If no handler was found (i.e. neither a handler context on the stack, nor |
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a static handler block), the NoHandlerSignal will be raised instead, |
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passing it the original exception in its exception-parameter. |
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This NoHandlerSignal can be handled just like any other signal. |
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(therefore, it is possible to catch any error by catching NoHandlerSignal. |
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When the NoHandler signal is raised, and neither a handler-context, nor |
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a handler block is defined for it, an emergencyHandler(-block) is evaluated. |
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This block is either provided by the current process |
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(see Process>>emergencySignalHandler) or as a global default by the Exception |
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class (see Exception>>emergencyHandler). |
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The default emergencyHandlerBlock (from Exception) will bring up a debugger. |
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HandlerBlocks allow a global (if its the EmergencyHandler in Exception) |
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or per-process signal handling to be added. Even to code which was never |
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planned to handle signals. |
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See samples in 'doc/coding' and actual raise code in Exception. |
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[Instance variables:] |
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mayProceed <Boolean> hint for the debugger - program may |
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proceed (currently not honored by the |
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debugger) |
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notifierString <String> error message to be output |
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nameClass <Class> for the printOn-implementation; nameClass |
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is the class, to which message (below) |
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should be sent to create the receiver. |
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message <Symbol> for the printOn-implementation; message |
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is the selector, which should be sent to |
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nameClass (above) to create the receiver. |
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handlerBlock <Block> if nonNil, a 1-arg block to be |
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evaluated when no handler context is |
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found. The block gets the exception |
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object as argument. This will play the role |
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of an on-stack handler. |
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[author:] |
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Claus Gittinger |
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[see also:] |
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GenericException |
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SignalSet QuerySignal |
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Object |
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(``Exception handling and signals'': programming/exceptions.html) |
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! ! |
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!Signal class methodsFor:'instance creation'! |
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new |
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"return a new signal" |
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^ (self basicNew) notifierString:'signal'; mayProceed:true |
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" |
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Signal new |
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" |
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"Modified: 8.10.1997 / 11:51:39 / cg" |
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! ! |
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!Signal class methodsFor:'Signal constants'! |
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genericSignal |
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"return the generic signal - thats the parent of all signals |
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in the system." |
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^ GenericException |
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"Created: / 8.10.1997 / 11:46:28 / cg" |
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"Modified: / 8.10.1997 / 11:47:08 / cg" |
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"Modified: / 4.8.1999 / 08:54:33 / stefan" |
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! |
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noHandlerSignal |
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"return the signal used to handle unhandled signals" |
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^ NoHandlerError |
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"Modified: / 4.8.1999 / 08:10:09 / stefan" |
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! ! |
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!Signal methodsFor:'Compatibility-VW'! |
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messageText:aString |
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^ self notifierString:aString |
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! |
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new |
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"create a new signal, using the receiver as a prototype and |
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setting the parent of the new signal to the receiver." |
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^ self newSignal |
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! ! |
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!Signal methodsFor:'accessing'! |
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errorString |
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"errorString is deprecated, use description instead" |
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<resource:#obsolete> |
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^ self description |
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! |
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handlerBlock |
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"return the handlerblock - if non-nil, this will be evaluated with the exception |
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object as argument, if no #handle:do: context was found on the stack." |
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200 |
^ handlerBlock |
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! |
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||
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handlerBlock:aOneArgBlock |
204 |
"set the handlerblock - this will be evaluated with the exception |
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object as argument, if no #handle:do: context was found on the stack." |
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handlerBlock := aOneArgBlock |
208 |
! |
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mayProceed |
211 |
"return the signals ability to proceed. |
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This flag is (currently) not checked by the system; |
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be prepared for changes here, to eventually have nonProceedable |
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signals refuse to let you continue execution." |
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^ mayProceed |
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! |
218 |
||
219 |
mayProceed:aBoolean |
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"set/clear the signals ability to proceed. |
419 | 221 |
This flag is (currently) not checked by the system; |
222 |
be prepared for changes here, to eventually have nonProceedable |
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signals refuse to let you continue execution." |
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mayProceed := aBoolean |
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! |
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||
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nameClass:aClass message:aSelector |
229 |
"this sets the class & selector of a method which returns |
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that signal - this is simply for documentation purposes - |
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see Signal>>printOn: implementation. |
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(took me a while to find that one out ;-)" |
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nameClass := aClass. |
235 |
message := aSelector |
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419 | 236 |
! |
237 |
||
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notifierString |
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"return the notifier string" |
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^ notifierString |
242 |
! |
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notifierString:aString |
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"set the notifier string" |
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notifierString := aString |
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! |
249 |
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250 |
parent |
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"return the parent-signal of the receiver" |
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^ parent |
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! |
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||
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parent:aSignal |
257 |
"set the parent-signal of the receiver." |
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parent := aSignal |
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! |
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parent:aSignal mayProceed:aBoolean |
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"set the parent-signal and the mayProceed flag of the receiver." |
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3010 | 265 |
parent := aSignal. |
266 |
mayProceed := aBoolean. |
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"Modified: 8.10.1997 / 11:56:11 / cg" |
622 | 269 |
! ! |
270 |
||
5835 | 271 |
!Signal methodsFor:'converting'! |
272 |
||
8239 | 273 |
, anExceptionHandler |
274 |
"return a SignalSet with myself and anExceptionHandler" |
|
5835 | 275 |
|
8239 | 276 |
^ SignalSet with:self with:anExceptionHandler |
5835 | 277 |
! ! |
278 |
||
622 | 279 |
!Signal methodsFor:'copying'! |
280 |
||
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281 |
deepCopyUsing:aDictionary |
622 | 282 |
"raise an error - deepCopy is not allowed for signals" |
1 | 283 |
|
622 | 284 |
^ self deepCopyError |
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285 |
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must catch #deppCopyUsing: instead of #deepCopy.
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286 |
"Created: / 31.3.1998 / 15:43:01 / cg" |
622 | 287 |
! ! |
288 |
||
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!Signal methodsFor:'exception creation'! |
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291 |
newException |
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292 |
"{ Pragma: +inlineNew }" |
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293 |
"answer a new exception object for this signal. |
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294 |
Subclasses may redefine this method" |
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295 |
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^ Exception basicNew setSignal:self |
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297 |
|
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Support for Block>>#on:do:on:do:
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298 |
"Created: / 26.2.1998 / 19:53:56 / stefan" |
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Support for Block>>#on:do:on:do:
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299 |
"Modified: / 23.7.1999 / 13:41:00 / stefan" |
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Support for Block>>#on:do:on:do:
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parents:
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diff
changeset
|
300 |
! ! |
38aa963476a5
Support for Block>>#on:do:on:do:
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parents:
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diff
changeset
|
301 |
|
622 | 302 |
!Signal methodsFor:'instance creation'! |
1 | 303 |
|
622 | 304 |
newSignal |
305 |
"create a new signal, using the receiver as a prototype and |
|
306 |
setting the parent of the new signal to the receiver." |
|
1 | 307 |
|
3010 | 308 |
^ (self copy) parent:self |
3004
220af5090ec2
added the genericSignal for PP compatiblity
Claus Gittinger <cg@exept.de>
parents:
2893
diff
changeset
|
309 |
|
220af5090ec2
added the genericSignal for PP compatiblity
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parents:
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diff
changeset
|
310 |
"Modified: 8.10.1997 / 11:53:06 / cg" |
70 | 311 |
! |
312 |
||
622 | 313 |
newSignalMayProceed:aBoolean |
314 |
"create a new signal, using the receiver as a prototype and |
|
315 |
setting the parent of the new signal to the receiver." |
|
362 | 316 |
|
3010 | 317 |
^ (self copy) parent:self mayProceed:aBoolean |
70 | 318 |
|
3004
220af5090ec2
added the genericSignal for PP compatiblity
Claus Gittinger <cg@exept.de>
parents:
2893
diff
changeset
|
319 |
"Modified: 8.10.1997 / 11:57:13 / cg" |
1 | 320 |
! ! |
321 |
||
5570 | 322 |
!Signal methodsFor:'printing & storing'! |
159 | 323 |
|
4563 | 324 |
description |
325 |
"return the notifier string. |
|
326 |
If the notifier string starts with space, prepend |
|
327 |
the parents notifier string" |
|
328 |
||
6116 | 329 |
|s| |
330 |
||
4563 | 331 |
notifierString isNil ifTrue:[ |
8292 | 332 |
^ parent description |
5949 | 333 |
]. |
6116 | 334 |
s := notifierString asString. |
335 |
(s startsWith:Character space) ifTrue:[ |
|
336 |
^ parent description, s |
|
5949 | 337 |
]. |
6116 | 338 |
^ s |
4563 | 339 |
|
340 |
" |
|
8292 | 341 |
Error description |
4563 | 342 |
" |
343 |
||
344 |
"Modified: / 12.3.1998 / 15:04:41 / stefan" |
|
345 |
! |
|
346 |
||
159 | 347 |
printOn:aStream |
348 |
"append a printed representation of the receiver on aStream" |
|
349 |
||
350 |
nameClass notNil ifTrue:[ |
|
4622
905b21c17057
care for non-class nameClass in printOn:
Claus Gittinger <cg@exept.de>
parents:
4564
diff
changeset
|
351 |
nameClass isBehavior ifTrue:[ |
905b21c17057
care for non-class nameClass in printOn:
Claus Gittinger <cg@exept.de>
parents:
4564
diff
changeset
|
352 |
aStream nextPutAll:nameClass name. |
905b21c17057
care for non-class nameClass in printOn:
Claus Gittinger <cg@exept.de>
parents:
4564
diff
changeset
|
353 |
] ifFalse:[ |
905b21c17057
care for non-class nameClass in printOn:
Claus Gittinger <cg@exept.de>
parents:
4564
diff
changeset
|
354 |
nameClass printOn:aStream. |
905b21c17057
care for non-class nameClass in printOn:
Claus Gittinger <cg@exept.de>
parents:
4564
diff
changeset
|
355 |
]. |
4502 | 356 |
aStream space. |
357 |
aStream nextPutAll:message. |
|
358 |
^ self |
|
159 | 359 |
]. |
360 |
^ super printOn:aStream |
|
361 |
! ! |
|
362 |
||
622 | 363 |
!Signal methodsFor:'queries'! |
364 |
||
365 |
accepts:aSignal |
|
366 |
"return true, if the receiver accepts the argument, aSignal. |
|
367 |
(i.e. the receiver is aSignal or a parent of it). False otherwise." |
|
368 |
||
369 |
|s| |
|
370 |
||
4527 | 371 |
self == aSignal ifTrue:[^ true]. |
622 | 372 |
aSignal isQuerySignal ifTrue:[^ false]. |
373 |
||
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
374 |
s := aSignal parent. |
622 | 375 |
[s notNil] whileTrue:[ |
4438 | 376 |
self == s ifTrue:[^ true]. |
377 |
s := s parent |
|
622 | 378 |
]. |
379 |
^ false |
|
4438 | 380 |
|
381 |
"Modified: / 22.3.1999 / 12:45:42 / stefan" |
|
622 | 382 |
! |
383 |
||
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
384 |
exceptionHandlerFor:anException in:aContext |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
385 |
"answer the exceptionHandler for anException from aContext." |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
386 |
|
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
387 |
^ self |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
388 |
! |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
389 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
390 |
handlerForSignal:signal context:theContext originator:originator |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
391 |
"answer the handler block for the signal from originator. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
392 |
The block is retrieved from aContext. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
393 |
Answer nil if the signal is not handled" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
394 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
395 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
396 |
(theContext selector ~~ #'handle:from:do:' |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
397 |
or:[(theContext argAt:2) == originator]) ifTrue:[ |
4513 | 398 |
(self == signal or:[self accepts:signal]) ifTrue:[ |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
399 |
^ theContext argAt:1 |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
400 |
] |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
401 |
]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
402 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
403 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
404 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
405 |
"Created: / 25.7.1999 / 19:55:43 / stefan" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
406 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
407 |
|
4547
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
408 |
handlerProtectedBlock:doBlock inContext:context |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
409 |
"set the handlerProtectedBlock in context" |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
410 |
|
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
411 |
context selector == #handle:do: ifTrue:[ |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
412 |
context argAt:2 put:doBlock. |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
413 |
] ifFalse:[context selector == #handle:from:do: ifTrue:[ |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
414 |
context argAt:3 put:doBlock. |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
415 |
]]. |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
416 |
|
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
417 |
|
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
418 |
|
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
419 |
! |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
420 |
|
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
421 |
handles:anException |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
422 |
"return true, if the receiver handles the argument, anException. |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
423 |
(i.e. the receiver is anExceptions signal or a parent of it)" |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
424 |
|
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
425 |
|signal| |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
426 |
|
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
427 |
signal := anException signal. |
4473
793078981f01
added #handlingSignalInContext:
Claus Gittinger <cg@exept.de>
parents:
4466
diff
changeset
|
428 |
|
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
429 |
self == signal ifTrue:[^ true]. "quick check" |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
430 |
anException isNotification ifTrue:[^ false]. "speed up queries by not traversing the parent chain" |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
431 |
|
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
432 |
[(signal := signal parent) notNil] whileTrue:[ |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
433 |
self == signal ifTrue:[^ true]. |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
434 |
]. |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
435 |
^ false |
4473
793078981f01
added #handlingSignalInContext:
Claus Gittinger <cg@exept.de>
parents:
4466
diff
changeset
|
436 |
! |
793078981f01
added #handlingSignalInContext:
Claus Gittinger <cg@exept.de>
parents:
4466
diff
changeset
|
437 |
|
622 | 438 |
inheritsFrom:anotherSignal |
439 |
"return true, if the receiver is a child of anotherSignal |
|
440 |
(i.e. if handling anotherSignal also handles the receiver) |
|
441 |
This is almost the same as accepts, but returns false, if |
|
442 |
the receiver is identical to anotherSignal." |
|
443 |
||
9271
6be3fa0ab53d
inheritsFrom: should not be used/redefined in the exception
Claus Gittinger <cg@exept.de>
parents:
9180
diff
changeset
|
444 |
<resource: #obsolete> |
6be3fa0ab53d
inheritsFrom: should not be used/redefined in the exception
Claus Gittinger <cg@exept.de>
parents:
9180
diff
changeset
|
445 |
|
622 | 446 |
self == anotherSignal ifTrue:[^ false]. |
447 |
^ anotherSignal accepts:self |
|
3521
4d83701cfc28
care for nil receiver in #isHandledIn:
Claus Gittinger <cg@exept.de>
parents:
3348
diff
changeset
|
448 |
|
4d83701cfc28
care for nil receiver in #isHandledIn:
Claus Gittinger <cg@exept.de>
parents:
3348
diff
changeset
|
449 |
"Modified: / 6.6.1998 / 20:37:47 / cg" |
622 | 450 |
! |
451 |
||
6200 | 452 |
isControlInterrupt |
453 |
^ false |
|
454 |
||
455 |
"Created: / 16.11.2001 / 16:12:20 / cg" |
|
456 |
! |
|
457 |
||
6631
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
458 |
isExceptionCreator |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
459 |
"return true, if the receiver can create exceptions, |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
460 |
this includes #raise, #raiseRequest as well as the behavior of |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
461 |
an exception handler, such as the #accepts: and #handles: messages" |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
462 |
|
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
463 |
^ true |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
464 |
! |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
465 |
|
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
466 |
isExceptionHandler |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
467 |
"return true, if the receiver responds to the exception handler protocol, |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
468 |
especially to the #accepts: and #handles: messages" |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
469 |
|
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
470 |
^ true |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
471 |
! |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
472 |
|
622 | 473 |
isHandled |
474 |
"return true, if there is a handler for the receiver signal. |
|
475 |
Raising an unhandled signal will usually lead into the debugger, |
|
2689 | 476 |
but can be caught globally by setting Exceptions EmergencyHandler." |
622 | 477 |
|
4676 | 478 |
^ GenericException exception:self isHandledIn:(thisContext sender). |
622 | 479 |
! |
480 |
||
481 |
isHandledIn:aContext |
|
482 |
"return true, if there is a handler for the receiver signal in the |
|
483 |
contextChain starting with aContext." |
|
484 |
||
4676 | 485 |
^ GenericException exception:self isHandledIn:aContext |
622 | 486 |
! |
487 |
||
488 |
isQuerySignal |
|
1249 | 489 |
"return true, if this is a querySignal - always return false here" |
490 |
||
622 | 491 |
^ false |
1249 | 492 |
|
493 |
"Modified: 22.4.1996 / 13:45:06 / cg" |
|
622 | 494 |
! ! |
495 |
||
496 |
!Signal methodsFor:'raising'! |
|
497 |
||
498 |
raise |
|
4438 | 499 |
"raise a signal nonproceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
500 |
The signals notifierString is used as messageText." |
622 | 501 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
502 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
503 |
|
8730 | 504 |
^ (self newException |
505 |
suspendedContext:thisContext sender) |
|
4540
4b99a82fe85a
suspendedContext setup explicit
Claus Gittinger <cg@exept.de>
parents:
4527
diff
changeset
|
506 |
raise |
1326 | 507 |
|
4438 | 508 |
"Modified: / 2.5.1996 / 16:36:23 / cg" |
509 |
"Modified: / 5.3.1998 / 16:44:36 / stefan" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
510 |
"Created: / 23.7.1999 / 14:07:17 / stefan" |
622 | 511 |
! |
512 |
||
513 |
raiseErrorString:aString |
|
1326 | 514 |
"raise a signal nonproceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
515 |
The argument is used as messageText." |
622 | 516 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
517 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
518 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
519 |
^ (self newException |
8730 | 520 |
suspendedContext:(thisContext sender) errorString:aString) |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
521 |
raise. |
1326 | 522 |
|
4438 | 523 |
"Modified: / 9.5.1996 / 15:17:59 / cg" |
524 |
"Modified: / 12.3.1998 / 15:15:22 / stefan" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
525 |
"Created: / 23.7.1999 / 14:07:33 / stefan" |
622 | 526 |
! |
527 |
||
5685 | 528 |
raiseErrorString:aString in:aContext |
529 |
"raise a signal nonproceedable. |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
530 |
The argument is used as messageText." |
5685 | 531 |
|
532 |
<context: #return> |
|
533 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
534 |
^ (self newException |
8730 | 535 |
suspendedContext:aContext errorString:aString) |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
536 |
raise. |
5685 | 537 |
|
538 |
"Modified: / 9.5.1996 / 15:17:59 / cg" |
|
539 |
"Modified: / 12.3.1998 / 15:15:22 / stefan" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
540 |
"Created: / 23.7.1999 / 14:07:33 / stefan" |
5685 | 541 |
! |
542 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
543 |
raiseFrom:something |
1326 | 544 |
"raise a signal nonproceedable. |
4438 | 545 |
The argument, something is passed both as parameter and originator." |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
546 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
547 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
548 |
|
8730 | 549 |
^ (self newException |
550 |
suspendedContext:(thisContext sender) parameter:something originator:something) |
|
4540
4b99a82fe85a
suspendedContext setup explicit
Claus Gittinger <cg@exept.de>
parents:
4527
diff
changeset
|
551 |
raise |
1326 | 552 |
|
4438 | 553 |
"Modified: / 2.5.1996 / 16:36:38 / cg" |
554 |
"Modified: / 5.3.1998 / 16:49:55 / stefan" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
555 |
"Created: / 23.7.1999 / 14:07:59 / stefan" |
622 | 556 |
! |
557 |
||
558 |
raiseRequest |
|
1326 | 559 |
"raise a signal proceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
560 |
The signals notifierString is used as messageText." |
622 | 561 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
562 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
563 |
|
8730 | 564 |
^ (self newException |
565 |
suspendedContext:thisContext sender) |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
566 |
raiseRequest. |
1326 | 567 |
|
4438 | 568 |
"Modified: / 2.5.1996 / 16:36:52 / cg" |
569 |
"Modified: / 5.3.1998 / 16:50:46 / stefan" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
570 |
"Created: / 23.7.1999 / 14:08:24 / stefan" |
622 | 571 |
! |
572 |
||
4759
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
573 |
raiseRequestErrorString:aString |
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
574 |
"raise a signal proceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
575 |
The argument, aString is used as messageText." |
4759
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
576 |
|
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
577 |
<context: #return> |
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
578 |
|
8730 | 579 |
^ (self newException |
580 |
suspendedContext:(thisContext sender) errorString:aString) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
581 |
raiseRequest |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
582 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
583 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
584 |
raiseRequestFrom:something |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
585 |
"raise a signal proceedable. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
586 |
The argument, something is passed both as parameter and originator." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
587 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
588 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
589 |
|
8730 | 590 |
^ (self newException |
591 |
suspendedContext:(thisContext sender) parameter:something originator:something) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
592 |
raiseRequest |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
593 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
594 |
"Modified: / 2.5.1996 / 16:36:38 / cg" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
595 |
"Modified: / 5.3.1998 / 16:52:46 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
596 |
"Created: / 23.7.1999 / 14:08:36 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
597 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
598 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
599 |
raiseRequestWith:aParameter |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
600 |
"raise a signal proceedable. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
601 |
The signals notifierString is used as messageText." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
602 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
603 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
604 |
|
8730 | 605 |
^ (self newException |
606 |
suspendedContext:(thisContext sender) parameter:aParameter) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
607 |
raiseRequest. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
608 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
609 |
"Modified: / 9.5.1996 / 15:13:20 / cg" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
610 |
"Modified: / 12.3.1998 / 15:16:57 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
611 |
"Created: / 23.7.1999 / 14:08:48 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
612 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
613 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
614 |
raiseRequestWith:aParameter errorString:aString |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
615 |
"raise a signal proceedable. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
616 |
The argument, aString is used as messageText." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
617 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
618 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
619 |
|
8730 | 620 |
^ (self newException |
621 |
suspendedContext:(thisContext sender) parameter:aParameter errorString:aString) |
|
4759
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
622 |
raiseRequest |
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
623 |
|
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
624 |
"Modified: / 9.5.1996 / 15:13:35 / cg" |
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
625 |
"Modified: / 12.3.1998 / 15:17:52 / stefan" |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
626 |
"Created: / 23.7.1999 / 14:08:57 / stefan" |
4759
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
627 |
! |
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
628 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
629 |
raiseRequestWith:aParameter errorString:aString in:aContext |
3103 | 630 |
"raise a signal proceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
631 |
The argument, aString is used as messageText. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
632 |
The additional context is passed as the context responsible for the raise, |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
633 |
allowing a raise to mimicri the exception happened somewhere else." |
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
634 |
|
8732 | 635 |
<context: #return> |
636 |
||
8730 | 637 |
^ (self newException |
638 |
suspendedContext:aContext parameter:aParameter errorString:aString) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
639 |
raiseRequest |
3103 | 640 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
641 |
"Modified: / 26.7.1996 / 16:29:27 / cg" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
642 |
"Modified: / 12.3.1998 / 15:18:34 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
643 |
"Created: / 23.7.1999 / 14:09:07 / stefan" |
3103 | 644 |
! |
645 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
646 |
raiseRequestWith:aParameter in:aContext |
1326 | 647 |
"raise a signal proceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
648 |
The additional context is passed as the context responsible for the raise, |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
649 |
allowing a raise to mimicri the exception happened somewhere else." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
650 |
|
8732 | 651 |
<context: #return> |
652 |
||
8730 | 653 |
^ (self newException |
654 |
suspendedContext:aContext parameter:aParameter) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
655 |
raiseRequest |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
656 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
657 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
658 |
raiseSignal |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
659 |
"raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
660 |
The signals notifierString is used as messageText." |
622 | 661 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
662 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
663 |
|
8730 | 664 |
^ (self newException |
665 |
suspendedContext:thisContext sender) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
666 |
raiseSignal |
1326 | 667 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
668 |
"Modified: / 10.11.2001 / 15:13:34 / cg" |
622 | 669 |
! |
670 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
671 |
raiseSignal:errorMessage |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
672 |
"ANSI: raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
673 |
The argument, errorMessage is used as messageText." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
674 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
675 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
676 |
|
8730 | 677 |
^ (self newException |
678 |
suspendedContext:(thisContext sender) errorString:errorMessage) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
679 |
raiseSignal. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
680 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
681 |
"Modified: / 07-08-2004 / 19:24:00 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
682 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
683 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
684 |
raiseSignal:errorMessage with:aParameter |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
685 |
"ANSI: raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
686 |
The argument, errorMessage is used as messageText." |
622 | 687 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
688 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
689 |
|
8730 | 690 |
^ (self newException |
691 |
suspendedContext:(thisContext sender) parameter:aParameter errorString:errorMessage) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
692 |
raiseSignal. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
693 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
694 |
"Modified: / 07-08-2004 / 19:10:40 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
695 |
! |
1326 | 696 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
697 |
raiseSignalErrorString:aString |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
698 |
"raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
699 |
The argument, aString is used as messageText." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
700 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
701 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
702 |
|
8730 | 703 |
^ (self newException |
704 |
suspendedContext:(thisContext sender) errorString:aString) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
705 |
raiseSignal. |
622 | 706 |
! |
707 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
708 |
raiseSignalWith:aParameter |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
709 |
"raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
710 |
The argument, aParameter is passed as parameter." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
711 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
712 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
713 |
|
8730 | 714 |
^ (self newException |
715 |
suspendedContext:(thisContext sender) parameter:aParameter) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
716 |
raiseSignal. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
717 |
! |
622 | 718 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
719 |
raiseSignalWith:aParameter errorString:aString |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
720 |
"raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
721 |
The argument, aString is used as messageText, |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
722 |
aParameter is passed as exception parameter." |
1326 | 723 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
724 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
725 |
|
8730 | 726 |
^ (self newException |
727 |
suspendedContext:(thisContext sender) parameter:aParameter errorString:aString) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
728 |
raiseSignal. |
622 | 729 |
! |
730 |
||
731 |
raiseWith:aParameter |
|
1326 | 732 |
"raise a signal nonproceedable. |
4438 | 733 |
The argument, aParameter is passed as parameter." |
622 | 734 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
735 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
736 |
|
8730 | 737 |
^ (self newException |
738 |
suspendedContext:(thisContext sender) parameter:aParameter) |
|
4540
4b99a82fe85a
suspendedContext setup explicit
Claus Gittinger <cg@exept.de>
parents:
4527
diff
changeset
|
739 |
raise. |
1326 | 740 |
|
4438 | 741 |
"Modified: / 9.5.1996 / 15:14:24 / cg" |
742 |
"Modified: / 12.3.1998 / 15:19:11 / stefan" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
743 |
"Created: / 23.7.1999 / 14:09:27 / stefan" |
622 | 744 |
! |
745 |
||
746 |
raiseWith:aParameter errorString:aString |
|
4438 | 747 |
"raise a signal nonproceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
748 |
The argument, aString is used as messageText, |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
749 |
aParameter is passed as exception parameter." |
622 | 750 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
751 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
752 |
|
8730 | 753 |
^ (self newException |
754 |
suspendedContext:(thisContext sender) parameter:aParameter errorString:aString) |
|
4540
4b99a82fe85a
suspendedContext setup explicit
Claus Gittinger <cg@exept.de>
parents:
4527
diff
changeset
|
755 |
raise. |
1326 | 756 |
|
4438 | 757 |
"Modified: / 9.5.1996 / 15:14:32 / cg" |
758 |
"Modified: / 12.3.1998 / 15:19:40 / stefan" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
759 |
"Created: / 23.7.1999 / 14:09:36 / stefan" |
1326 | 760 |
! |
761 |
||
762 |
raiseWith:aParameter errorString:aString in:aContext |
|
4438 | 763 |
"raise a signal nonproceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
764 |
The argument, aString is used as messageText, aParameter is passed |
1608 | 765 |
as exception parameter. |
766 |
The additional context is passed as the context responsible for the raise, |
|
767 |
allowing a raise to mimicri the exception happened somewhere else." |
|
768 |
||
8732 | 769 |
<context: #return> |
770 |
||
8730 | 771 |
^ (self newException |
772 |
suspendedContext:aContext parameter:aParameter errorString:aString) |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
773 |
raise. |
1326 | 774 |
|
4438 | 775 |
"Modified: / 26.7.1996 / 16:29:42 / cg" |
776 |
"Modified: / 12.3.1998 / 15:20:12 / stefan" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
777 |
"Created: / 23.7.1999 / 14:09:46 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
778 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
779 |
|
9180 | 780 |
raiseWith:aParameter in:aContext |
781 |
"raise a signal nonproceedable. |
|
782 |
The argument, aParameter is passed as parameter. |
|
783 |
The additional context is passed as the context responsible for the raise, |
|
784 |
allowing a raise to mimicri the exception happened somewhere else." |
|
785 |
||
786 |
<context: #return> |
|
787 |
||
788 |
^ (self newException |
|
789 |
suspendedContext:aContext parameter:aParameter) |
|
790 |
raise. |
|
791 |
! |
|
792 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
793 |
signalWith:messageText |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
794 |
"ANSI compatibility" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
795 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
796 |
self raiseErrorString:messageText |
622 | 797 |
! ! |
798 |
||
1 | 799 |
!Signal methodsFor:'save evaluation'! |
800 |
||
622 | 801 |
catch:aBlock |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
802 |
"evaluate the argument, aBlock. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
803 |
If the receiver-signal is raised during evaluation, abort |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
804 |
the evaluation and return true; otherwise return false. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
805 |
This is the catch & throw mechanism found in other languages, |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
806 |
where the returned value indicates if an exception occured." |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
807 |
|
9079 | 808 |
|raiseOccurred| |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
809 |
|
9079 | 810 |
raiseOccurred := false. |
811 |
self handle:[:ex | raiseOccurred := true. ex return] do:aBlock. |
|
812 |
^ raiseOccurred |
|
622 | 813 |
|
9079 | 814 |
" |
815 |
Object messageNotUnderstoodSignal catch:[ |
|
816 |
123 size open |
|
817 |
] |
|
818 |
" |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
819 |
! |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
820 |
|
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
821 |
deferAfter:aBlock |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
822 |
"evaluate the argument, aBlock. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
823 |
Ignore the receiver-signal during evaluation - i.e. simply continue, |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
824 |
but remember if the signal was raised. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
825 |
After the block evaluation, finally raise the signal - if it was raised in the block. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
826 |
If the signal is raised multiple times, only the first raises parameter is remembered, |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
827 |
and only a single raise is performed after the blocks evaluation. |
622 | 828 |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
829 |
Deferring makes sense for some signals, such as UserInterrupt or AbortSignal, |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
830 |
which must occasionally be delayed temprarily until a save place is reached |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
831 |
(especially when packages are sent across a communication channel, and you dont want |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
832 |
partial packages to be generated by user interruptions)." |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
833 |
|
6429
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
834 |
|coughtException result| |
622 | 835 |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
836 |
self handle:[:ex | |
6429
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
837 |
coughtException isNil ifTrue:[ |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
838 |
coughtException := ex. |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
839 |
]. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
840 |
ex proceedWith:nil |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
841 |
] do:[ |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
842 |
result := aBlock value. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
843 |
]. |
6429
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
844 |
coughtException notNil ifTrue:[ |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
845 |
coughtException suspendedContext:thisContext. |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
846 |
|
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
847 |
"/ the signal was raised during the execution of aBlock above. |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
848 |
"/ Raise it now (delayed). |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
849 |
coughtException raiseSignal |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
850 |
]. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
851 |
^ result |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
852 |
|
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
853 |
" |
6429
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
854 |
|s| |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
855 |
|
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
856 |
s := Signal new mayProceed:true. |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
857 |
s deferAfter:[ |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
858 |
s raiseRequestWith:'hello' errorString:'eeee' |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
859 |
] |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
860 |
" |
622 | 861 |
! |
862 |
||
1 | 863 |
handle:handleBlock do:aBlock |
864 |
"evaluate the argument, aBlock. |
|
865 |
If the receiver-signal is raised during evaluation, |
|
866 |
evaluate the handleBlock passing it an Exception argument. |
|
867 |
The handler may decide how to react to the signal by sending |
|
868 |
a corresponding message to the exception (see there). |
|
869 |
If the signal is not raised, return the value of evaluating |
|
870 |
aBlock." |
|
871 |
||
4547
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
872 |
<context: #return> |
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
873 |
<exception: #handle> |
95 | 874 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
875 |
"/ thisContext markForHandle. -- same as above pragma |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
876 |
^ aBlock value "the real logic is in Exception>>doRaise" |
120 | 877 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
878 |
" |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
879 |
Object messageNotUnderstoodSignal handle:[:ex | |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
880 |
'oops' printNL. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
881 |
ex return |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
882 |
] do:[ |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
883 |
123 size open |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
884 |
] |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
885 |
" |
95 | 886 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
887 |
" |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
888 |
|num| |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
889 |
|
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
890 |
num := 0. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
891 |
Number divisionByZeroSignal handle:[:ex | |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
892 |
'oops' printNL. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
893 |
ex return |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
894 |
] do:[ |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
895 |
123 / num |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
896 |
] |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
897 |
" |
4438 | 898 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
899 |
"Modified: / 25.7.1999 / 19:43:01 / stefan" |
44 | 900 |
! |
901 |
||
362 | 902 |
handle:handleBlock from:anObject do:aBlock |
903 |
"evaluate the argument, aBlock. |
|
904 |
If the receiver-signal is raised during evaluation, |
|
905 |
and the exception originated from anObject, |
|
906 |
evaluate the handleBlock passing it an Exception argument. |
|
907 |
The handler may decide how to react to the signal by sending |
|
908 |
a corresponding message to the exception (see there). |
|
909 |
If the signal is not raised, return the value of evaluating |
|
910 |
aBlock." |
|
911 |
||
4547
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
912 |
<context: #return> |
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
913 |
<exception: #handle> |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
914 |
|
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
915 |
"/ thisContext markForHandle. -- same as above pragma |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
916 |
^ aBlock value "the real logic is in Exception>>doRaise" |
362 | 917 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
918 |
" |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
919 |
the first open will be caught; the second not: |
362 | 920 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
921 |
|o1 o2| |
362 | 922 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
923 |
o1 := 123. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
924 |
o2 := nil. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
925 |
Object messageNotUnderstoodSignal |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
926 |
handle: |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
927 |
[:ex | |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
928 |
'oops' printNL. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
929 |
ex proceed |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
930 |
] |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
931 |
from:o1 |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
932 |
do: |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
933 |
[ |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
934 |
o1 open. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
935 |
o2 open |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
936 |
] |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
937 |
" |
4438 | 938 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
939 |
"Modified: / 25.7.1999 / 19:43:40 / stefan" |
362 | 940 |
! |
941 |
||
419 | 942 |
ignoreIn:aBlock |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
943 |
"evaluate the argument, aBlock. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
944 |
Ignore the receiver-signal during evaluation - i.e. simply continue. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
945 |
This makes only sense for some signals, such as UserInterrupt |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
946 |
or AbortSignal, because continuing after an exception without any cleanup |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
947 |
often leads to followup-errors." |
159 | 948 |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
949 |
^ self handle:[:ex | ex proceedWith:nil] do:aBlock. |
159 | 950 |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
951 |
" |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
952 |
Object messageNotUnderstoodSignal ignoreIn:[ |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
953 |
123 size open |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
954 |
] |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
955 |
" |
1 | 956 |
! ! |
957 |
||
2207 | 958 |
!Signal class methodsFor:'documentation'! |
1249 | 959 |
|
960 |
version |
|
9271
6be3fa0ab53d
inheritsFrom: should not be used/redefined in the exception
Claus Gittinger <cg@exept.de>
parents:
9180
diff
changeset
|
961 |
^ '$Header: /cvs/stx/stx/libbasic/Signal.st,v 1.102 2006-03-14 12:54:25 cg Exp $' |
1249 | 962 |
! ! |