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/**Implementation for NSInvocationOperation for GNUStep
Copyright (C) 2013 Free Software Foundation, Inc.
Written by: Graham Lee <iamleeg@gmail.com>
Date: 2013
This file is part of the GNUstep Base Library.
This 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 of the License, or (at your option) any later version.
This 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 this library; if not, write to the Free
Software Foundation, Inc., 31 Milk Street #960789 Boston, MA 02196 USA.
<title>NSInvocationOperation class reference</title>
$Date$ $Revision$
*/
#import "common.h"
#import "Foundation/NSInvocationOperation.h"
#import "Foundation/NSException.h"
#import "Foundation/NSInvocation.h"
#import "Foundation/NSMethodSignature.h"
#import "Foundation/NSValue.h"
#import "GNUstepBase/GSObjCRuntime.h"
@implementation NSInvocationOperation
- (id) initWithInvocation: (NSInvocation *)inv
{
if (((self = [super init])) != nil)
{
[inv retainArguments];
_invocation = RETAIN(inv);
}
return self;
}
- (id) initWithTarget: (id)target selector: (SEL)aSelector object: (id)arg
{
NSMethodSignature *methodSignature;
NSInvocation *inv;
methodSignature = [target methodSignatureForSelector: aSelector];
inv = [NSInvocation invocationWithMethodSignature: methodSignature];
[inv setTarget: target];
[inv setSelector: aSelector];
if ([methodSignature numberOfArguments] > 2)
{
[inv setArgument: &arg atIndex: 2];
}
return [self initWithInvocation: inv];
}
- (void) main
{
if (![self isCancelled])
{
NS_DURING
{
[_invocation invoke];
}
NS_HANDLER
{
ASSIGN(_exception, localException);
}
NS_ENDHANDLER
}
}
- (NSInvocation *) invocation
{
return AUTORELEASE(RETAIN(_invocation));
}
- (id) result
{
id result = nil;
if (![self isFinished])
{
return nil;
}
if (nil != _exception)
{
[_exception raise];
}
else if ([self isCancelled])
{
[NSException raise: (id)NSInvocationOperationCancelledException
format: @"*** %s: operation was cancelled", __PRETTY_FUNCTION__];
}
else
{
const char *returnType = [[_invocation methodSignature] methodReturnType];
if (0 == strncmp(@encode(void),
GSSkipTypeQualifierAndLayoutInfo(returnType), 1))
{
[NSException raise: (id)NSInvocationOperationVoidResultException
format: @"*** %s: void result", __PRETTY_FUNCTION__];
}
else if (0 == strncmp(@encode(id),
GSSkipTypeQualifierAndLayoutInfo(returnType), 1))
{
[_invocation getReturnValue: &result];
}
else
{
unsigned char *buffer = malloc([[_invocation methodSignature]
methodReturnLength]);
[_invocation getReturnValue: buffer];
result = [NSValue valueWithBytes: buffer objCType: returnType];
free(buffer);
}
}
return result;
}
- (void) dealloc
{
DESTROY(_invocation);
DESTROY(_exception);
[super dealloc];
}
@end
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