/usr/share/gnu-smalltalk/kernel/CallinProcess.st is in gnu-smalltalk-common 3.2.4-2.1.
This file is owned by root:root, with mode 0o644.
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| CallinProcess Method Definitions
|
|
======================================================================"
"======================================================================
|
| Copyright 2002 Free Software Foundation, Inc.
| Written by Paolo Bonzini.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
|
| The GNU Smalltalk class library is distributed in the hope that it will be
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
| General Public License for more details.
|
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LIB.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02110-1301, USA.
|
======================================================================"
Process subclass: CallinProcess [
| returnedValue |
<category: 'Language-Processes'>
<comment: 'I represent a unit of computation for which external C code requested
execution, so I must store the returned value once my computation
terminates and I must not survive across image saves (since those who
invoked me no longer exist). I am otherwise equivalent to a Process.'>
returnContext [
"Return the base context in the process, i.e. the one that is
responsible for passing the return value to C."
<category: 'private'>
| context |
context := self context.
[ context parentContext isNil ] whileFalse: [
context := context parentContext ].
^context
]
detach [
"Continue running the receiver as a normal Process, and return
nil from the callin."
<category: 'debugging'>
| p |
self isActive ifFalse: [
^SystemExceptions.InvalidState signalOn: self
reason: 'process not active' ].
p := Process basicNew.
Link instSize + 1 to: Process instSize do: [ :i |
p instVarAt: i put: (self instVarAt: i) ].
"Start executing the detached process from here."
p suspendedContext: thisContext copy.
Processor activeProcess == self ifTrue: [
"This only runs in the CallinProcess."
thisContext parentContext: self returnContext.
p resume.
^nil ]
]
]
|