"

 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.

"

SystemStatusMonitor subclass:#ProcessMonitor

	instanceVariableNames:'processes hideDead runColor suspendedColor waitColor cpuUsages

		showDetail'

	classVariableNames:''

	poolDictionaries:''

	category:'Monitors-ST/X'

!

!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)

    [see also:]

        Process ProcessorScheduler

        WindowGroup

        SemaphoreMonitor

    [author:]

        Claus Gittinger

    [start with:]

        ProcessMonitor open

"

! !

!ProcessMonitor class methodsFor:'defaults'!

defaultIcon

    |i|

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

    i notNil ifTrue:[^ i].

    ^ super defaultIcon

    "Modified: 23.1.1997 / 02:52:31 / cg"

!

defaultLabel

    ^ 'Process Monitor'

! !

!ProcessMonitor methodsFor:'drawing'!

titleLine

    showDetail ifTrue:[

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

    ].

    ^ 'id  group name                           state    prio where                                           '.

    "Modified: 3.7.1996 / 13:57:38 / stefan"

    "Modified: 28.3.1997 / 16:48:14 / cg"

!

updateList

    "update list of processes"

    |newList|

    shown ifTrue:[

        showDetail ifTrue:[

        ] ifFalse:[

            newList := ProcessorScheduler knownProcesses asOrderedCollection.

        ].

        "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

    ].

    "Modified: 3.7.1996 / 13:37:29 / stefan"

!

updateStatus

    "update status display of processes"

    |oldList list line dIndex interrupted contextCount 

     aProcess nm st n found running sel space oldSelection

     newSelection numHeaderLines|

    numHeaderLines := 2.

    space := Character space.

    shown ifTrue:[

        oldList := listView list.

        processes notNil ifTrue:[

            oldSelection := listView selection.

            oldSelection notNil ifTrue:[

                oldSelection := oldSelection collect:[:idx | |pI|

                                                pI := idx-numHeaderLines.

                                                pI > processes size ifTrue:[

                                                    nil

                                                ] ifFalse:[

                                                    processes at:pI

                                                ]

                                             ].

                newSelection := OrderedCollection new.

            ].

            list := OrderedCollection new:(processes size + numHeaderLines).

            list add:self titleLine.

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

            interrupted := Processor interruptedProcess.

            dIndex := 1.

            1 to:processes size do:[:index |

                |con c totalStack sender id gId|

                aProcess := processes at:index.

                (aProcess notNil 

                and:[aProcess ~~ 0]) ifTrue:[

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

                        (oldSelection notNil and:[oldSelection includesIdentical:aProcess]) ifTrue:[

                            newSelection add:index+numHeaderLines.

                        ].

                        line := WriteStream on:(String new:200).

                        id printOn:line paddedTo:5.

                        gId := aProcess processGroupId.

                        gId == id ifTrue:[

                            "/ a group leader

                            '-    ' printOn:line.

                        ] ifFalse:[

                            gId printOn:line paddedTo:5.

                        ].

                        (nm := aProcess name) isNil ifFalse:[

                            nm := nm printStringPaddedTo:28.

                            nm size >= 29 ifTrue:[

                                nm := (nm contractTo:28).

                            ].

                            line nextPutAll:nm; nextPut:space.

                        ] ifTrue:[

                            line next:29 put:space.

                        ].

"/                        n := cpuUsages at:(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 := ' *'.

                            running := true.

                        ] ifFalse:[

                            c := '  '.

                            running := false.

                        ].

                        line nextPutAll:c; nextPutAll:(st printStringPaddedTo:9).

                        line nextPutAll:(aProcess priority printStringLeftPaddedTo:3).

                        con := aProcess suspendedContext.

                        con isNil ifTrue:[

                            aProcess == Processor activeProcess ifTrue:[

                                con := thisContext

                            ]

                        ].

                        showDetail ifTrue:[

                            line nextPutAll:(aProcess usedStackSize printStringLeftPaddedTo:11).

                            id == 0 ifTrue:[

                                line nextPutAll:('unlimited' leftPaddedTo:14).

                            ] ifFalse:[

                                n := aProcess numberOfStackSegments.

                                line nextPutAll:(aProcess totalStackSize printStringLeftPaddedTo:10).

                                line nextPutAll:(('(' , n printString , ')') paddedTo:4).

                            ].

                            con notNil ifTrue:[

                                line nextPutAll:'  '.

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

                                line nextPutAll:' .. '.

                                contextCount := 1.

                                c := con.

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

                                    c := sender.

                                    contextCount := contextCount + 1.

                                ].

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

                            ] ifFalse:[

                                line next:20 put:space.

                            ].

                            line nextPut:space.

                            line nextPutAll:(aProcess numberOfStackBoundaryHits printStringLeftPaddedTo:6).

                        ].

                        con notNil ifTrue:[

                            c := con.

                            found := false.

                            running ifFalse:[

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

                                1 to:10 do:[:n |

                                    found ifFalse:[

                                        c notNil ifTrue:[

                                            (c receiver class == Semaphore) ifTrue:[

                                                c selector == #wait ifTrue:[

                                                    found := true.

                                                ]

                                            ].

                                            c := c sender.

                                        ]

                                    ]

                                ].

                            ].    

                            found ifFalse:[

                                "/ search for a non-processor receiver in the top 10 contexts

                                c := con.

                                1 to:10 do:[:n |

                                    |r|

                                    found ifFalse:[

                                        c notNil ifTrue:[

                                            ((r := c receiver) ~~ Processor 

                                             and:[r class ~~ Process]) ifTrue:[

                                                found := true.

                                            ] ifFalse:[

                                                c := c sender.

                                            ]

                                        ]

                                    ]

                                ]

                            ].

                            found ifFalse:[

                                c := con

                            ].

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

                                c := c home

                            ].

                            c notNil ifTrue:[

                                sel := c selector.

                                sel isNil ifTrue:[

                                    sel := '* unknown *'

                                ].

                                line nextPutAll:'  '.

                                line nextPutAll:c receiver class name.

                                line nextPutAll:'>>'; nextPutAll:sel.

                            ]

                        ].

                        list add:line contents.

                        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.

            oldSelection notNil ifTrue:[

                listView selection:newSelection.

            ]

        ].

"/        listView flush

    ].

    updateBlock notNil ifTrue:[

        Processor removeTimedBlock:updateBlock.

        Processor addTimedBlock:updateBlock afterSeconds:updateDelay

    ]

    "Modified: 3.7.1996 / 13:56:01 / stefan"

    "Modified: 24.4.1997 / 21:16:25 / cg"

! !

!ProcessMonitor methodsFor:'initialization'!

initialize

    super initialize.

    hideDead := true.

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

    device hasColors ifTrue:[

        runColor := Color green.

        suspendedColor := Color yellow.

        waitColor := Color red.

    ] ifFalse:[

        runColor := suspendedColor := waitColor := Color black

    ].

    "

     ProcessMonitor open

    "

    "Modified: 23.1.1997 / 02:51:38 / cg"

!

realize

    waitColor := waitColor on:device.

    runColor := runColor on:device.

    suspendedColor := suspendedColor on:device.

    super realize.

    "Modified: 23.1.1997 / 02:30:37 / cg"

! !

!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

    ]

!

hideDead:aBoolean

    "turn on/off hiding of dead (already terminated) processes"

    hideDead := aBoolean

    "Modified: 23.1.1997 / 02:34:01 / cg"

!

inspectSelection

    "open an inspector on the selected process"

    self selectedProcessesSend:#inspect

    "Created: 23.1.1997 / 02:27:33 / cg"

!

lowerPrio

    "lower the selected processes priority"

    self selectedProcessesDo:[:p |

       p priority:(p priority - 1)

    ]

!

raisePrio

    "raise the selected processes priority"

    self selectedProcessesDo:[:p |

       p priority:(p priority + 1)

    ]

!

restartProcess

    "abort (raise AbortSignal in) the selected process"

    self selectedProcessesDo:[:p |

        p restart.

    ]

!

resumeProcess

    "resume the selected process (i.e. let it run) "

    self selectedProcessesSend:#resume

!

statusMenu

    "return a popUpMenu"

    |labels selectors m sel allRestartable|

    device ctrlDown ifTrue:[

        labels := resources array:#(

                        '\c detail'

                      ).

        selectors := #(

                        toggleDetail

                      ).

    ] ifFalse:[

        labels := resources array:#(

                             'inspect' 

                             'debug'  

                             '-'  

                             'resume'  

                             'suspend'  

                             'stop'  

                             'abort'

                             'terminate'

                             'terminate group'

                             'restart'

                             '-'  

                             'raise prio'  

                             'lower prio'  

                            ).

        selectors := #(

                             inspectSelection

                             debugProcess  

                             nil  

                             resumeProcess  

                             suspendProcess  

                             stopProcess