/usr/share/gnu-smalltalk/kernel/CFuncs.st is in gnu-smalltalk-common 3.2.4-2.1.
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|
| CFunctionDescriptor Method Definitions
|
|
======================================================================"
"======================================================================
|
| Copyright 1988,92,94,95,99,2000,2001,2002,2003,2005,2008
| Free Software Foundation, Inc.
| Written by Steve Byrne.
|
| 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.
|
======================================================================"
CCallable subclass: CFunctionDescriptor [
| cFunctionName |
<shape: #inherit>
<category: 'Language-C interface'>
<comment: 'I am not part of the Smalltalk definition. My instances contain information
about C functions that can be called from within Smalltalk, such as number
and type of parameters. This information is used by the C callout mechanism
to perform the actual call-out to C routines.'>
CFunctionDescriptor class >> for: funcName returning: returnTypeSymbol withArgs: argsArray [
"Answer a CFunctionDescriptor with the given function name, return type
and arguments. funcName must be a String."
<category: 'instance creation'>
^(super for: nil returning: returnTypeSymbol withArgs: argsArray)
name: funcName;
yourself
]
CFunctionDescriptor class >> addressOf: function [
"Answer the address (CObject) of the function which is registered (on
the C side) with the given name, or zero if no such a function is
registered."
<category: 'testing'>
<primitive: VMpr_CFuncDescriptor_addressOf>
^CObject new
]
CFunctionDescriptor class >> isFunction: function [
"Answer whether a function is registered (on the C side) with the
given name."
<category: 'testing'>
^(self addressOf: function) address ~= 0
]
name [
"Answer the name of the function (on the C side) represented by the
receiver"
<category: 'accessing'>
^cFunctionName
]
name: aString [
"Set the name of the function (on the C side) represented by the
receiver"
<category: 'accessing'>
cFunctionName := aString
]
link [
"Make the address of the function point to the registered address."
<category: 'restoring'>
self address: (CFunctionDescriptor addressOf: self name) address.
]
printOn: aStream [
"Print a representation of the receiver onto aStream"
<category: 'printing'>
aStream
print: self class;
nextPut: $(.
self name isNil ifFalse: [ aStream nextPutAll: self name ].
self address = 0 ifFalse: [
self name isNil ifFalse: [ aStream nextPutAll: ' @ ' ].
aStream nextPutAll: (self address printStringRadix: 16)
].
aStream nextPut: $)
]
]
SystemDictionary extend [
system: aString [
<category: 'c call-outs'>
<cCall: 'system' returning: #int args: #(#string)>
]
getenv: aString [
<category: 'c call-outs'>
<cCall: 'getenv' returning: #string args: #(#string)>
]
putenv: aString [
<category: 'c call-outs'>
<cCall: 'putenv' returning: #int args: #(#string)>
]
getArgc [
<category: 'c call-outs'>
<cCall: 'getArgc' returning: #int args: #()>
]
getArgv: index [
<category: 'c call-outs'>
<cCall: 'getArgv' returning: #string args: #(#int)>
]
]
|