ObjFW  Artifact [eaefae089e]

Artifact eaefae089ef542e5bad023cdf1ea01fcee426e1d6112938ff5559cbb01a5a29e:

• File src/OFPlugin.m — part of check-in [e1e7ffa903] at 2011-09-22 23:25:42 on branch trunk — Exceptions are now autoreleased.

  This is safe as an "exception loop" can't happen, since if allocating
  an exception fails, it throws an OFAllocFailedException which is
  preallocated and can always be thrown.

  So, the worst case would be that an autorelease of an exception fails,
  triggering an OFOutOfMemoryException for which there is no memory,
  resulting in an OFAllocFailedException to be thrown. (user: js, size: 2042) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#include <stdlib.h>
#include <string.h>

#ifndef _WIN32
#include <dlfcn.h>
#endif

#import "OFPlugin.h"
#import "OFString.h"
#import "OFAutoreleasePool.h"

#import "OFInitializationFailedException.h"
#import "OFNotImplementedException.h"

#ifdef _WIN32
# define dlopen(file, mode) LoadLibrary(file)
# define dlsym(handle, symbol) GetProcAddress(handle, symbol)
# define dlclose(handle) FreeLibrary(handle)
#endif

@implementation OFPlugin
+ pluginFromFile: (OFString*)path
{
	OFAutoreleasePool *pool;
	OFMutableString *file;
	of_plugin_handle_t handle;
	OFPlugin *(*initPlugin)();
	OFPlugin *plugin;

	pool = [[OFAutoreleasePool alloc] init];
	file = [OFMutableString stringWithString: path];
	[file appendString: @PLUGIN_SUFFIX];

	if ((handle = dlopen([file cStringWithEncoding:
	    OF_STRING_ENCODING_NATIVE], RTLD_LAZY)) == NULL)
		@throw [OFInitializationFailedException
		    exceptionWithClass: self];

	[pool release];

	initPlugin = (OFPlugin*(*)())dlsym(handle, "init_plugin");
	if (initPlugin == NULL || (plugin = initPlugin()) == nil) {
		dlclose(handle);
		@throw [OFInitializationFailedException
		    exceptionWithClass: self];
	}

	plugin->handle = handle;
	return plugin;
}

- init
{
	if (isa == [OFPlugin class]) {
		Class c = isa;
		[self release];
		@throw [OFNotImplementedException exceptionWithClass: c
							    selector: _cmd];
	}

	return [super init];
}

- (void)dealloc
{
	of_plugin_handle_t h = handle;

	[super dealloc];

	dlclose(h);
}
@end