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ipc/chromium/src/base/lock_impl_posix.cc@6474c204b198 (annotated)

ipc/chromium/src/base/lock_impl_posix.cc

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
michael@0	2	// Use of this source code is governed by a BSD-style license that can be
michael@0	3	// found in the LICENSE file.
michael@0	4
michael@0	5	#include "base/lock_impl.h"
michael@0	6
michael@0	7	#include <errno.h>
michael@0	8
michael@0	9	#include "base/logging.h"
michael@0	10
michael@0	11	LockImpl::LockImpl() {
michael@0	12	#ifndef NDEBUG
michael@0	13	// In debug, setup attributes for lock error checking.
michael@0	14	pthread_mutexattr_t mta;
michael@0	15	int rv = pthread_mutexattr_init(&mta);
michael@0	16	DCHECK_EQ(rv, 0);
michael@0	17	rv = pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_ERRORCHECK);
michael@0	18	DCHECK_EQ(rv, 0);
michael@0	19	rv = pthread_mutex_init(&os_lock_, &mta);
michael@0	20	DCHECK_EQ(rv, 0);
michael@0	21	rv = pthread_mutexattr_destroy(&mta);
michael@0	22	DCHECK_EQ(rv, 0);
michael@0	23	#else
michael@0	24	// In release, go with the default lock attributes.
michael@0	25	pthread_mutex_init(&os_lock_, NULL);
michael@0	26	#endif
michael@0	27	}
michael@0	28
michael@0	29	LockImpl::~LockImpl() {
michael@0	30	int rv = pthread_mutex_destroy(&os_lock_);
michael@0	31	DCHECK_EQ(rv, 0);
michael@0	32	}
michael@0	33
michael@0	34	bool LockImpl::Try() {
michael@0	35	int rv = pthread_mutex_trylock(&os_lock_);
michael@0	36	DCHECK(rv == 0 || rv == EBUSY);
michael@0	37	return rv == 0;
michael@0	38	}
michael@0	39
michael@0	40	void LockImpl::Lock() {
michael@0	41	int rv = pthread_mutex_lock(&os_lock_);
michael@0	42	DCHECK_EQ(rv, 0);
michael@0	43	}
michael@0	44
michael@0	45	void LockImpl::Unlock() {
michael@0	46	int rv = pthread_mutex_unlock(&os_lock_);
michael@0	47	DCHECK_EQ(rv, 0);
michael@0	48	}