license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame] | 1 | // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
mmentovai@google.com | f5a4000 | 2008-08-09 01:19:43 +0900 | [diff] [blame] | 4 | |
| 5 | #include "base/lock_impl.h" |
| 6 | |
| 7 | #include <errno.h> |
| 8 | |
| 9 | #include "base/logging.h" |
| 10 | |
| 11 | LockImpl::LockImpl() { |
deanm@chromium.org | d4eb87f | 2008-10-01 23:45:24 +0900 | [diff] [blame] | 12 | #ifndef NDEBUG |
| 13 | // In debug, setup attributes for lock error checking. |
erikkay@google.com | 3620e4c | 2008-08-12 00:38:27 +0900 | [diff] [blame] | 14 | pthread_mutexattr_t mta; |
| 15 | int rv = pthread_mutexattr_init(&mta); |
deanm@chromium.org | 538e8bb | 2009-03-17 03:03:34 +0900 | [diff] [blame] | 16 | DCHECK_EQ(rv, 0); |
deanm@chromium.org | d4eb87f | 2008-10-01 23:45:24 +0900 | [diff] [blame] | 17 | rv = pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_ERRORCHECK); |
deanm@chromium.org | 538e8bb | 2009-03-17 03:03:34 +0900 | [diff] [blame] | 18 | DCHECK_EQ(rv, 0); |
erikkay@google.com | 3620e4c | 2008-08-12 00:38:27 +0900 | [diff] [blame] | 19 | rv = pthread_mutex_init(&os_lock_, &mta); |
deanm@chromium.org | 538e8bb | 2009-03-17 03:03:34 +0900 | [diff] [blame] | 20 | DCHECK_EQ(rv, 0); |
erikkay@google.com | 3620e4c | 2008-08-12 00:38:27 +0900 | [diff] [blame] | 21 | rv = pthread_mutexattr_destroy(&mta); |
deanm@chromium.org | 538e8bb | 2009-03-17 03:03:34 +0900 | [diff] [blame] | 22 | DCHECK_EQ(rv, 0); |
deanm@chromium.org | d4eb87f | 2008-10-01 23:45:24 +0900 | [diff] [blame] | 23 | #else |
| 24 | // In release, go with the default lock attributes. |
| 25 | pthread_mutex_init(&os_lock_, NULL); |
| 26 | #endif |
mmentovai@google.com | f5a4000 | 2008-08-09 01:19:43 +0900 | [diff] [blame] | 27 | } |
| 28 | |
| 29 | LockImpl::~LockImpl() { |
| 30 | int rv = pthread_mutex_destroy(&os_lock_); |
deanm@chromium.org | 538e8bb | 2009-03-17 03:03:34 +0900 | [diff] [blame] | 31 | DCHECK_EQ(rv, 0); |
mmentovai@google.com | f5a4000 | 2008-08-09 01:19:43 +0900 | [diff] [blame] | 32 | } |
| 33 | |
| 34 | bool LockImpl::Try() { |
| 35 | int rv = pthread_mutex_trylock(&os_lock_); |
| 36 | DCHECK(rv == 0 || rv == EBUSY); |
| 37 | return rv == 0; |
| 38 | } |
| 39 | |
| 40 | void LockImpl::Lock() { |
| 41 | int rv = pthread_mutex_lock(&os_lock_); |
deanm@chromium.org | 538e8bb | 2009-03-17 03:03:34 +0900 | [diff] [blame] | 42 | DCHECK_EQ(rv, 0); |
mmentovai@google.com | f5a4000 | 2008-08-09 01:19:43 +0900 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | void LockImpl::Unlock() { |
| 46 | int rv = pthread_mutex_unlock(&os_lock_); |
deanm@chromium.org | 538e8bb | 2009-03-17 03:03:34 +0900 | [diff] [blame] | 47 | DCHECK_EQ(rv, 0); |
mmentovai@google.com | f5a4000 | 2008-08-09 01:19:43 +0900 | [diff] [blame] | 48 | } |