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498b8300c3
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@36860 72102866-910b-0410-8b05-ffd578937521
133 lines
3.4 KiB
Objective-C
133 lines
3.4 KiB
Objective-C
/**Implementation for NSInvocationOperation for GNUStep
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Copyright (C) 2013 Free Software Foundation, Inc.
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Written by: Graham Lee <iamleeg@gmail.com>
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Date: 2013
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This file is part of the GNUstep Base Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02111 USA.
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<title>NSInvocationOperation class reference</title>
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$Date$ $Revision$
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*/
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#import "common.h"
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#import <Foundation/NSInvocationOperation.h>
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#import <Foundation/NSException.h>
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#import <Foundation/NSInvocation.h>
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#import <Foundation/NSMethodSignature.h>
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#import <Foundation/NSValue.h>
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@implementation NSInvocationOperation
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- (id) initWithInvocation: (NSInvocation *)inv
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{
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if (((self = [super init])) != nil)
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{
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[inv retainArguments];
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_invocation = [inv retain];
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}
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return self;
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}
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- (id) initWithTarget: (id)target selector: (SEL)aSelector object: (id)arg
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{
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NSMethodSignature *methodSignature;
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NSInvocation *inv;
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methodSignature = [target methodSignatureForSelector: aSelector];
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inv = [NSInvocation invocationWithMethodSignature: methodSignature];
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[inv setTarget: target];
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[inv setSelector: aSelector];
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if ([methodSignature numberOfArguments] > 2)
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[inv setArgument: &arg atIndex: 2];
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return [self initWithInvocation: inv];
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}
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- (void) main
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{
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if (![self isCancelled])
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{
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NS_DURING
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[_invocation invoke];
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NS_HANDLER
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_exception = [localException copy];
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NS_ENDHANDLER
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}
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}
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- (NSInvocation *) invocation
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{
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return [[_invocation retain] autorelease];
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}
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- (id) result
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{
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id result = nil;
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if (![self isFinished])
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{
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return nil;
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}
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if (nil != _exception)
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{
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[_exception raise];
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}
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else if ([self isCancelled])
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{
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[NSException raise: (id)NSInvocationOperationCancelledException
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format: @"*** %s: operation was cancelled", __PRETTY_FUNCTION__];
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}
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else
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{
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const char *returnType = [[_invocation methodSignature] methodReturnType];
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if (0 == strncmp(@encode(void), returnType, 1))
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{
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[NSException raise: (id)NSInvocationOperationVoidResultException
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format: @"*** %s: void result", __PRETTY_FUNCTION__];
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}
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else if (0 == strncmp(@encode(id), returnType, 1))
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{
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[_invocation getReturnValue: &result];
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}
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else
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{
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unsigned char *buffer = malloc([[_invocation methodSignature]
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methodReturnLength]);
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[_invocation getReturnValue: buffer];
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result = [NSValue valueWithBytes: buffer objCType: returnType];
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}
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}
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return result;
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}
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- (void) dealloc
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{
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[_invocation release];
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[_exception release];
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[super dealloc];
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}
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@end
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const NSString * NSInvocationOperationVoidResultException
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= @"NSInvocationOperationVoidResultException";
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const NSString * NSInvocationOperationCancelledException
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= @"NSInvcationOperationCancelledException";
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