56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/synchronization/lock_impl.h"
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#include <errno.h>
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#include <string.h>
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#include "base/logging.h"
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namespace base {
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namespace internal {
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LockImpl::LockImpl() {
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#ifndef NDEBUG
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// In debug, setup attributes for lock error checking.
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pthread_mutexattr_t mta;
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int rv = pthread_mutexattr_init(&mta);
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DCHECK_EQ(rv, 0) << ". " << strerror(rv);
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rv = pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_ERRORCHECK);
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DCHECK_EQ(rv, 0) << ". " << strerror(rv);
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rv = pthread_mutex_init(&os_lock_, &mta);
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DCHECK_EQ(rv, 0) << ". " << strerror(rv);
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rv = pthread_mutexattr_destroy(&mta);
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DCHECK_EQ(rv, 0) << ". " << strerror(rv);
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#else
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// In release, go with the default lock attributes.
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pthread_mutex_init(&os_lock_, NULL);
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#endif
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}
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LockImpl::~LockImpl() {
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int rv = pthread_mutex_destroy(&os_lock_);
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DCHECK_EQ(rv, 0) << ". " << strerror(rv);
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}
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bool LockImpl::Try() {
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int rv = pthread_mutex_trylock(&os_lock_);
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DCHECK(rv == 0 || rv == EBUSY) << ". " << strerror(rv);
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return rv == 0;
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}
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void LockImpl::Lock() {
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int rv = pthread_mutex_lock(&os_lock_);
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DCHECK_EQ(rv, 0) << ". " << strerror(rv);
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}
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void LockImpl::Unlock() {
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int rv = pthread_mutex_unlock(&os_lock_);
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DCHECK_EQ(rv, 0) << ". " << strerror(rv);
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}
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} // namespace internal
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} // namespace base
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