/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019, 2020
* Jonathan Schleifer <js@nil.im>
*
* 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 <errno.h>
#import "OFRecursiveMutex.h"
#import "OFString.h"
#import "OFInitializationFailedException.h"
#import "OFLockFailedException.h"
#import "OFStillLockedException.h"
#import "OFUnlockFailedException.h"
@implementation OFRecursiveMutex
@synthesize name = _name;
+ (instancetype)mutex
{
return [[[self alloc] init] autorelease];
}
- (instancetype)init
{
self = [super init];
if (!of_rmutex_new(&_rmutex)) {
Class c = self.class;
[self release];
@throw [OFInitializationFailedException exceptionWithClass: c];
}
_initialized = true;
return self;
}
- (void)dealloc
{
if (_initialized) {
if (!of_rmutex_free(&_rmutex)) {
OF_ENSURE(errno == EBUSY);
@throw [OFStillLockedException exceptionWithLock: self];
}
}
[_name release];
[super dealloc];
}
- (void)lock
{
if (!of_rmutex_lock(&_rmutex))
@throw [OFLockFailedException exceptionWithLock: self
errNo: errno];
}
- (bool)tryLock
{
if (!of_rmutex_trylock(&_rmutex)) {
if (errno == EBUSY)
return false;
else
@throw [OFLockFailedException exceptionWithLock: self
errNo: errno];
}
return true;
}
- (void)unlock
{
if (!of_rmutex_unlock(&_rmutex))
@throw [OFUnlockFailedException exceptionWithLock: self
errNo: errno];
}
- (OFString *)description
{
if (_name == nil)
return super.description;
return [OFString stringWithFormat: @"<%@: %@>", self.className, _name];
}
@end