"

 COPYRIGHT (c) 1993 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

SimpleView subclass:#ProcessMonitor

!

!ProcessMonitor class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1993 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    This view shows smalltalks (light-weight) processes, and also offers

    a popup menu for various useful operations on them.

    Especially 'debug' is useful, to see what a process is currently

    doing.

    The information shown is:

	id         - the numeric id of the process

	name       - the name (if any) of the process

		     (the name has no semantic meaning; it exists for the processMonitor only)

	state      - what is it doing;

			wait      - waiting on a semaphore

			eventWait - waiting on a view-event semaphore

			ioWait    - waiting on an io-semaphore

			timeWait  - waiting for a time-semaphore

			run       - run, but currently not scheduled

			active    - really running (this info is useless, since at

				    update time, its always the update process which is

				    running)

			suspended - suspended; not waiting on a semaphore

			light     - not yet started (i.e. has no stack yet)

	prio       - the processes priority (1..30)

	usedStack  - the current stack use

	totalStack - the stack currently allocated (i.e. the maximum ever needed)

"

! !

!ProcessMonitor class methodsFor:'defaults'!

defaultIcon

    |i|

    i := Image fromFile:'ProcMon.xbm'.

    i notNil ifTrue:[^ i].

    ^ StandardSystemView defaultIcon

!

defaultLabel

    ^ 'Process Monitor'

! !

!ProcessMonitor class methodsFor:'startup'!

open

    |top monitor|

    top := StandardSystemView new.

    monitor := self origin:0.0@0.0 corner:1.0@1.0 in:top.

    top extent:monitor preferredExtent.

    top label:self defaultLabel.

    top icon:self defaultIcon.

    top open

    "

     ProcessMonitor open

    "

! !

!ProcessMonitor methodsFor:'destroying'!

destroy

    updateBlock notNil ifTrue:[

	Processor removeTimedBlock:updateBlock.

	Processor removeTimedBlock:listUpdateBlock.

    ] ifFalse:[

	updateProcess notNil ifTrue:[updateProcess terminate]

    ].

    super destroy

! !

!ProcessMonitor methodsFor:'drawing'!

titleLine

    showDetail ifTrue:[

    ^ 'id   name                           state    prio   usedStack  totalStack   current-segment   switches   where'.

    ].

    ^ 'id   name                           state    prio   usedStack  where'.

!

updateList

    "update list of processes"

    |newList|

    shown ifTrue:[

        showDetail ifTrue:[

            newList := Process allInstances asOrderedCollection.

        ] ifFalse:[

            newList := ProcessorScheduler knownProcesses asOrderedCollection.

        ].

        newList := newList  select:[:p | p id notNil].

        "sort by id - take care of nil ids of dead processes"

        newList sort:[:p1 :p2 |

                         |id1 id2|

                         (p1 isNil or:[(id1 := p1 id) isNil])

                             ifTrue:[true]

                             ifFalse:[

                                 (p2 isNil or:[(id2 := p2 id) isNil])

                                     ifTrue:[false]

                                     ifFalse:[id1 < id2]

                         ]

                     ].

        newList ~= processes ifTrue:[

            processes := WeakArray withAll:newList.

            self updateStatus

        ].

    ].

    updateBlock notNil ifTrue:[

        Processor removeTimedBlock:listUpdateBlock.

        Processor addTimedBlock:listUpdateBlock afterSeconds:listUpdateDelay

    ].

!

updateStatus

    "update status display of processes"

    |oldList list line dIndex con interrupted plist aProcess nm st c c0 n found sender|

    shown ifTrue:[

        oldList := listView list.

        processes notNil ifTrue:[

            list := OrderedCollection new.

            list add:self titleLine.

            list add:(String new:self titleLine size withAll:$-).

            interrupted := Processor interruptedProcess.

            dIndex := 1.

            1 to:processes size do:[:index |

                |totalStack|

                aProcess := processes at:index.

                aProcess notNil ifTrue:[

                    (aProcess id notNil or:[hideDead not]) ifTrue:[

                        line := aProcess id printStringPaddedTo:5.

                        (nm := aProcess name) isNil ifFalse:[

                            nm := nm printString

                        ] ifTrue:[

                            nm := ' '

                        ].

                        nm size >= 29 ifTrue:[

                            nm := (nm contractTo:28) , ' '

                        ] ifFalse:[

                            nm := (nm printStringPaddedTo:29).

                        ].

                        line := line , nm.

"/                        n := cpuUsages at:(aProcess id) ifAbsent:[0].

"/                        n ~~ 0 ifTrue:[

"/                            line := line , ((n * 4) printStringLeftPaddedTo:3)

"/                        ] ifFalse:[

"/                            line := line , '   '

"/                        ].

                        st := aProcess state.

                        (st == #run

                         and:[aProcess == interrupted]) ifTrue:[

                            c := ' *'.

                        ] ifFalse:[

                            c := '  '.

                        ].

                        line := line , c , (st printStringPaddedTo:9).

                        line := line , (aProcess priority printStringLeftPaddedTo:3).

                        line := line , (aProcess usedStackSize printStringLeftPaddedTo:11).

                        n := aProcess numberOfStackSegments.

"/                        n == 0 ifTrue:[

"/                            con := nil

"/                        ] ifFalse:[

                            con := aProcess suspendedContext.

                            con isNil ifTrue:[

                                aProcess == Processor activeProcess ifTrue:[

                                    con := thisContext

                                ]

                            ].

"/                        ].

                        showDetail ifTrue:[

                            aProcess id == 0 ifTrue:[

                                line := line , ('unlimited' leftPaddedTo:13).

                            ] ifFalse:[

                                line := line , (aProcess totalStackSize printStringLeftPaddedTo:10).

                                line := line , '(' , n printString , ')'.

                            ].

                            con notNil ifTrue:[

                                line := line , '    '.

                                line := line , (((ObjectMemory addressOf:con) printStringRadix:16) leftPaddedTo:8 with:$0).

                                line := line , ' .. '.

                                c := con.

                                [(sender := c sender) notNil] whileTrue:[

                                    c := sender

                                ].

                                line := line , (((ObjectMemory addressOf:c) printStringRadix:16) leftPaddedTo:8 with:$0).

                            ] ifFalse:[

                                line := line , (String new:20)

                            ].

                            line := line , ' '.

                            line := line , (aProcess numberOfStackBoundaryHits printStringLeftPaddedTo:5).

                        ].

                        con notNil ifTrue:[

                            "/ search for a semaphore-wait in the top 10 contexts

                            found := false.

                            c := con.

                            1 to:10 do:[:n |

                                found ifFalse:[

                                    c notNil ifTrue:[

                                        (c receiver isMemberOf:Semaphore) ifTrue:[

                                            c selector == #wait ifTrue:[

                                                found := true.

                                            ]

                                        ].

                                        c := c sender.

                                    ]

                                ]

                            ].

                            found ifFalse:[

                                c := con.

                                1 to:10 do:[:n |

                                    found ifFalse:[

                                        c notNil ifTrue:[

                                            (c receiver ~~ Processor) ifTrue:[

                                                found := true.

                                            ] ifFalse:[

                                                c := c sender.

                                            ]

                                        ]

                                    ]

                                ]

                            ].

                            found ifFalse:[

                                c := con

                            ].

                            [c notNil and:[c isBlockContext]] whileTrue:[

                                c := c home

                            ].

                            c notNil ifTrue:[

                                n := c receiver class name , '>>' , c selector.

                                line := line , '   ' , n

                            ]

                        ].

                        list add:line.

                        processes at:dIndex put:aProcess.

                        dIndex := dIndex + 1

                    ]

                ].

            ].

            dIndex to:processes size do:[:index |

                processes at:index put:nil

            ]

        ].

        "avoid flicker"

        (oldList notNil and:[oldList size == list size]) ifTrue:[

            list keysAndValuesDo:[:idx :entry |

                (oldList at:idx) ~= entry ifTrue:[

                    listView at:idx put:entry

                ]

            ]

        ] ifFalse:[

            listView setList:list.

            "the first two entries cannot be selected"

            listView attributeAt:1 put:#disabled.

            listView attributeAt:2 put:#disabled.

        ].

	listView flush

    ].

    updateBlock notNil ifTrue:[

        Processor removeTimedBlock:updateBlock.

        Processor addTimedBlock:updateBlock afterSeconds:updateDelay

    ]

!

updateView

    self updateList.

    self updateStatus

! !

!ProcessMonitor methodsFor:'events'!

canHandle:key

    ^ key == #InspectIt

!

keyPress:key x:x y:y

    <resource: #keyboard ( #InspectIt ) >

    key == #InspectIt ifTrue:[

	^ self inspectProcess.

    ].

    ^ super keyPress:key x:x y:y

! !

!ProcessMonitor methodsFor:'initialization'!

initialize

    |v|

    super initialize.

    hideDead := true.

    showDetail := Smalltalk at:#SystemDebugging ifAbsent:false.

    v := HVScrollableView for:SelectionInListView miniScrollerH:true in:self.

    v origin:0.0@0.0 corner:1.0@1.0.

"/    self extent:(font widthOf:self titleLine) + v scrollBar width @ 100.

    listView := v scrolledView.

    listView font:font.

    listView menuHolder:self; menuPerformer:self; menuMessage:#processMenu. 

    listView multipleSelectOk:true.

    listView delegate:(KeyboardForwarder toView:self).

    updateDelay := 0.5.

    listUpdateDelay := 5.

    ].

    device hasColors ifTrue:[

    ] ifFalse:[

    ]

    "

     ProcessMonitor open

    "

!

mapped

    super mapped.

    self updateStatus.

    self updateList.

!

realize

    super realize.

    waitColor := waitColor on:device.

    runColor := runColor on:device.

    suspendedColor := suspendedColor on:device.

    self startUpdateProcess.

!

startUpdateProcess

    updateBlock notNil ifTrue:[

	Processor addTimedBlock:updateBlock afterSeconds:updateDelay.

	Processor addTimedBlock:listUpdateBlock afterSeconds:listUpdateDelay.

    ] ifFalse:[

	updateProcess := [

	    Process terminateSignal handle:[:ex |

		updateProcess := nil

	    ] do:[

		|id cnt|

		"

		 every 20ms, we look which process runs;

		 every half second, the status is updated.

		 every 5 seconds, the list of processes is

		 built up again

		"

		[true] whileTrue:[

		    1 to:9 do:[:i |

"/                        cpuUsages := IdentityDictionary new.

"/                        1 to:25 do:[:i |

"/                            (Delay forSeconds:0.02) wait.

"/                            id := Processor interruptedProcess id.

"/                            cnt := cpuUsages at:id ifAbsent:[0].

"/                            cpuUsages at:id put:cnt + 1.

"/                        ].

			(Delay forSeconds:0.5) wait.

			self updateStatus.

		    ].

		    (Delay forSeconds:0.5) wait.

		    self updateList.

		]

	    ]

	]  forkAt:(Processor userSchedulingPriority + 1).

	updateProcess name:'monitor [' , 

			   Processor activeProcess id printString ,

			   '] update'.

	"

	 raise my own priority

	"

	Processor activeProcess priority:(Processor userSchedulingPriority + 2)

    ].

! !

!ProcessMonitor methodsFor:'menu actions'!

abortProcess

    "abort (raise AbortSignal in) the selected process"

    self selectedProcessesDo:[:p |

	p interruptWith:[AbortSignal raise]

    ]

!

debugProcess

    "open a debugger on the selected process"

    self selectedProcessesDo:[:p |

       Debugger openOn:p

    ]

!

detail

    showDetail := showDetail not.

    self updateView

!

hideDead:aBoolean

    hideDead := aBoolean

!

inspectProcess

    "open an inspector on the selected process"

    self selectedProcessesSend:#inspect

!

lowerPrio

    "lower the selected processes priority"

    self selectedProcessesDo:[:p |

       p priority:(p priority - 1)

    ]

!

processMenu

    |labels selectors m|

    device ctrlDown ifTrue:[

	labels := resources array:#(