753eada3aa
Corresponds to upstream commit 524e9b043e7e86fd72353b987c9d5f6a1ebf83e1 Update notes: * Pull in third party license file * Replace .gypi files with BUILD.gn to keep track of what changes upstream * Bunch of new filse pulled in as dependencies * Won't build yet due to changes needed on top of these
108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/system_wrappers/source/thread_win.h"
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#include <process.h>
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#include <stdio.h>
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#include <windows.h>
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#include "webrtc/base/checks.h"
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#include "webrtc/base/platform_thread.h"
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#include "webrtc/system_wrappers/interface/trace.h"
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namespace webrtc {
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namespace {
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void CALLBACK RaiseFlag(ULONG_PTR param) {
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*reinterpret_cast<bool*>(param) = true;
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}
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}
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ThreadWindows::ThreadWindows(ThreadRunFunction func, void* obj,
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const char* thread_name)
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: run_function_(func),
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obj_(obj),
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stop_(false),
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thread_(NULL),
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name_(thread_name ? thread_name : "webrtc") {
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RTC_DCHECK(func);
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}
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ThreadWindows::~ThreadWindows() {
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RTC_DCHECK(main_thread_.CalledOnValidThread());
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RTC_DCHECK(!thread_);
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}
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// static
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uint32_t ThreadWrapper::GetThreadId() {
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return GetCurrentThreadId();
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}
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// static
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DWORD WINAPI ThreadWindows::StartThread(void* param) {
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static_cast<ThreadWindows*>(param)->Run();
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return 0;
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}
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bool ThreadWindows::Start() {
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RTC_DCHECK(main_thread_.CalledOnValidThread());
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RTC_DCHECK(!thread_);
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stop_ = false;
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// See bug 2902 for background on STACK_SIZE_PARAM_IS_A_RESERVATION.
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// Set the reserved stack stack size to 1M, which is the default on Windows
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// and Linux.
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DWORD thread_id;
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thread_ = ::CreateThread(NULL, 1024 * 1024, &StartThread, this,
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STACK_SIZE_PARAM_IS_A_RESERVATION, &thread_id);
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if (!thread_ ) {
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RTC_DCHECK(false) << "CreateThread failed";
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return false;
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}
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return true;
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}
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bool ThreadWindows::Stop() {
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RTC_DCHECK(main_thread_.CalledOnValidThread());
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if (thread_) {
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// Set stop_ to |true| on the worker thread.
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QueueUserAPC(&RaiseFlag, thread_, reinterpret_cast<ULONG_PTR>(&stop_));
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WaitForSingleObject(thread_, INFINITE);
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CloseHandle(thread_);
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thread_ = nullptr;
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}
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return true;
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}
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bool ThreadWindows::SetPriority(ThreadPriority priority) {
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RTC_DCHECK(main_thread_.CalledOnValidThread());
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return thread_ && SetThreadPriority(thread_, priority);
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}
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void ThreadWindows::Run() {
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if (!name_.empty())
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rtc::SetCurrentThreadName(name_.c_str());
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do {
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// The interface contract of Start/Stop is that for a successfull call to
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// Start, there should be at least one call to the run function. So we
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// call the function before checking |stop_|.
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if (!run_function_(obj_))
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break;
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// Alertable sleep to permit RaiseFlag to run and update |stop_|.
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SleepEx(0, true);
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} while (!stop_);
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}
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} // namespace webrtc
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