15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/synchronization/lock_impl.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <errno.h> 83551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#include <string.h> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace internal { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)LockImpl::LockImpl() { 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef NDEBUG 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In debug, setup attributes for lock error checking. 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pthread_mutexattr_t mta; 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int rv = pthread_mutexattr_init(&mta); 203551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) DCHECK_EQ(rv, 0) << ". " << strerror(rv); 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_ERRORCHECK); 223551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) DCHECK_EQ(rv, 0) << ". " << strerror(rv); 23d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) rv = pthread_mutex_init(&native_handle_, &mta); 243551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) DCHECK_EQ(rv, 0) << ". " << strerror(rv); 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = pthread_mutexattr_destroy(&mta); 263551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) DCHECK_EQ(rv, 0) << ". " << strerror(rv); 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In release, go with the default lock attributes. 29d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) pthread_mutex_init(&native_handle_, NULL); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)LockImpl::~LockImpl() { 34d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) int rv = pthread_mutex_destroy(&native_handle_); 353551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) DCHECK_EQ(rv, 0) << ". " << strerror(rv); 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool LockImpl::Try() { 39d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) int rv = pthread_mutex_trylock(&native_handle_); 403551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) DCHECK(rv == 0 || rv == EBUSY) << ". " << strerror(rv); 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return rv == 0; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void LockImpl::Lock() { 45d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) int rv = pthread_mutex_lock(&native_handle_); 463551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) DCHECK_EQ(rv, 0) << ". " << strerror(rv); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void LockImpl::Unlock() { 50d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) int rv = pthread_mutex_unlock(&native_handle_); 513551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) DCHECK_EQ(rv, 0) << ". " << strerror(rv); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace internal 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 56