| // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/message_loop/message_pump_default.h" |
| |
| #include "base/auto_reset.h" |
| #include "base/logging.h" |
| #include "base/threading/thread_restrictions.h" |
| #include "build/build_config.h" |
| |
| #if defined(OS_MACOSX) |
| #include <mach/thread_policy.h> |
| |
| #include "base/mac/mach_logging.h" |
| #include "base/mac/scoped_mach_port.h" |
| #include "base/mac/scoped_nsautorelease_pool.h" |
| #endif |
| |
| namespace base { |
| |
| MessagePumpDefault::MessagePumpDefault() |
| : keep_running_(true), |
| event_(WaitableEvent::ResetPolicy::AUTOMATIC, |
| WaitableEvent::InitialState::NOT_SIGNALED) { |
| event_.declare_only_used_while_idle(); |
| } |
| |
| MessagePumpDefault::~MessagePumpDefault() = default; |
| |
| void MessagePumpDefault::Run(Delegate* delegate) { |
| AutoReset<bool> auto_reset_keep_running(&keep_running_, true); |
| |
| for (;;) { |
| #if defined(OS_MACOSX) |
| mac::ScopedNSAutoreleasePool autorelease_pool; |
| #endif |
| |
| Delegate::NextWorkInfo next_work_info = delegate->DoSomeWork(); |
| bool has_more_immediate_work = next_work_info.is_immediate(); |
| if (!keep_running_) |
| break; |
| |
| if (has_more_immediate_work) |
| continue; |
| |
| has_more_immediate_work = delegate->DoIdleWork(); |
| if (!keep_running_) |
| break; |
| |
| if (has_more_immediate_work) |
| continue; |
| |
| if (next_work_info.delayed_run_time.is_max()) { |
| event_.Wait(); |
| } else { |
| event_.TimedWait(next_work_info.remaining_delay()); |
| } |
| // Since event_ is auto-reset, we don't need to do anything special here |
| // other than service each delegate method. |
| } |
| } |
| |
| void MessagePumpDefault::Quit() { |
| keep_running_ = false; |
| } |
| |
| void MessagePumpDefault::ScheduleWork() { |
| // Since this can be called on any thread, we need to ensure that our Run |
| // loop wakes up. |
| event_.Signal(); |
| } |
| |
| void MessagePumpDefault::ScheduleDelayedWork( |
| const TimeTicks& delayed_work_time) { |
| // Since this is always called from the same thread as Run(), there is nothing |
| // to do as the loop is already running. It will wait in Run() with the |
| // correct timeout when it's out of immediate tasks. |
| // TODO(gab): Consider removing ScheduleDelayedWork() when all pumps function |
| // this way (bit.ly/merge-message-pump-do-work). |
| } |
| |
| #if defined(OS_MACOSX) |
| void MessagePumpDefault::SetTimerSlack(TimerSlack timer_slack) { |
| thread_latency_qos_policy_data_t policy{}; |
| policy.thread_latency_qos_tier = timer_slack == TIMER_SLACK_MAXIMUM |
| ? LATENCY_QOS_TIER_3 |
| : LATENCY_QOS_TIER_UNSPECIFIED; |
| mac::ScopedMachSendRight thread_port(mach_thread_self()); |
| kern_return_t kr = |
| thread_policy_set(thread_port.get(), THREAD_LATENCY_QOS_POLICY, |
| reinterpret_cast<thread_policy_t>(&policy), |
| THREAD_LATENCY_QOS_POLICY_COUNT); |
| MACH_DVLOG_IF(1, kr != KERN_SUCCESS, kr) << "thread_policy_set"; |
| } |
| #endif |
| |
| } // namespace base |