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comparison: ipc/chromium/src/base/condition_variable_posix.cc
ipc/chromium/src/base/condition_variable_posix.cc
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:9c2dab871c05 |
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| 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. | |
| 4 | |
| 5 #include "base/condition_variable.h" | |
| 6 | |
| 7 #include <errno.h> | |
| 8 #include <sys/time.h> | |
| 9 | |
| 10 #include "base/lock.h" | |
| 11 #include "base/lock_impl.h" | |
| 12 #include "base/logging.h" | |
| 13 #include "base/time.h" | |
| 14 | |
| 15 using base::Time; | |
| 16 using base::TimeDelta; | |
| 17 | |
| 18 ConditionVariable::ConditionVariable(Lock* user_lock) | |
| 19 : user_mutex_(user_lock->lock_impl()->os_lock()) { | |
| 20 int rv = 0; | |
| 21 #if !defined(OS_MACOSX) && !defined(OS_ANDROID) | |
| 22 pthread_condattr_t attrs; | |
| 23 rv = pthread_condattr_init(&attrs); | |
| 24 DCHECK_EQ(0, rv); | |
| 25 pthread_condattr_setclock(&attrs, CLOCK_MONOTONIC); | |
| 26 rv = pthread_cond_init(&condition_, &attrs); | |
| 27 pthread_condattr_destroy(&attrs); | |
| 28 #else | |
| 29 rv = pthread_cond_init(&condition_, NULL); | |
| 30 #endif | |
| 31 DCHECK_EQ(0, rv); | |
| 32 } | |
| 33 | |
| 34 ConditionVariable::~ConditionVariable() { | |
| 35 int rv = pthread_cond_destroy(&condition_); | |
| 36 DCHECK(rv == 0); | |
| 37 } | |
| 38 | |
| 39 void ConditionVariable::Wait() { | |
| 40 int rv = pthread_cond_wait(&condition_, user_mutex_); | |
| 41 DCHECK(rv == 0); | |
| 42 } | |
| 43 | |
| 44 void ConditionVariable::TimedWait(const TimeDelta& max_time) { | |
| 45 int64_t usecs = max_time.InMicroseconds(); | |
| 46 | |
| 47 struct timespec relative_time; | |
| 48 relative_time.tv_sec = usecs / Time::kMicrosecondsPerSecond; | |
| 49 relative_time.tv_nsec = | |
| 50 (usecs % Time::kMicrosecondsPerSecond) * Time::kNanosecondsPerMicrosecond; | |
| 51 | |
| 52 #if defined(OS_MACOSX) | |
| 53 int rv = pthread_cond_timedwait_relative_np( | |
| 54 &condition_, user_mutex_, &relative_time); | |
| 55 #else | |
| 56 // The timeout argument to pthread_cond_timedwait is in absolute time. | |
| 57 struct timespec now; | |
| 58 clock_gettime(CLOCK_MONOTONIC, &now); | |
| 59 | |
| 60 struct timespec absolute_time; | |
| 61 absolute_time.tv_sec = now.tv_sec; | |
| 62 absolute_time.tv_nsec = now.tv_nsec; | |
| 63 absolute_time.tv_sec += relative_time.tv_sec; | |
| 64 absolute_time.tv_nsec += relative_time.tv_nsec; | |
| 65 absolute_time.tv_sec += absolute_time.tv_nsec / Time::kNanosecondsPerSecond; | |
| 66 absolute_time.tv_nsec %= Time::kNanosecondsPerSecond; | |
| 67 DCHECK_GE(absolute_time.tv_sec, now.tv_sec); // Overflow paranoia | |
| 68 | |
| 69 #if defined(OS_ANDROID) | |
| 70 int rv = pthread_cond_timedwait_monotonic_np( | |
| 71 &condition_, user_mutex_, &absolute_time); | |
| 72 #else | |
| 73 int rv = pthread_cond_timedwait(&condition_, user_mutex_, &absolute_time); | |
| 74 #endif // OS_ANDROID | |
| 75 #endif // OS_MACOSX | |
| 76 | |
| 77 DCHECK(rv == 0 || rv == ETIMEDOUT); | |
| 78 } | |
| 79 | |
| 80 void ConditionVariable::Broadcast() { | |
| 81 int rv = pthread_cond_broadcast(&condition_); | |
| 82 DCHECK(rv == 0); | |
| 83 } | |
| 84 | |
| 85 void ConditionVariable::Signal() { | |
| 86 int rv = pthread_cond_signal(&condition_); | |
| 87 DCHECK(rv == 0); | |
| 88 } |
