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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_UTILITY_SOURCE_PROCESS_THREAD_IMPL_H_
#define WEBRTC_MODULES_UTILITY_SOURCE_PROCESS_THREAD_IMPL_H_
#include <list>
#include <queue>
#include "webrtc/base/criticalsection.h"
#include "webrtc/base/platform_thread.h"
#include "webrtc/base/thread_checker.h"
#include "webrtc/modules/utility/include/process_thread.h"
#include "webrtc/system_wrappers/include/event_wrapper.h"
#include "webrtc/typedefs.h"
namespace webrtc {
class ProcessThreadImpl : public ProcessThread {
public:
explicit ProcessThreadImpl(const char* thread_name);
~ProcessThreadImpl() override;
void Start() override;
void Stop() override;
void WakeUp(Module* module) override;
void PostTask(rtc::scoped_ptr<ProcessTask> task) override;
void RegisterModule(Module* module) override;
void DeRegisterModule(Module* module) override;
protected:
static bool Run(void* obj);
bool Process();
private:
struct ModuleCallback {
ModuleCallback() : module(nullptr), next_callback(0) {}
ModuleCallback(const ModuleCallback& cb)
: module(cb.module), next_callback(cb.next_callback) {}
ModuleCallback(Module* module) : module(module), next_callback(0) {}
bool operator==(const ModuleCallback& cb) const {
return cb.module == module;
}
Module* const module;
int64_t next_callback; // Absolute timestamp.
private:
ModuleCallback& operator=(ModuleCallback&);
};
typedef std::list<ModuleCallback> ModuleList;
// Warning: For some reason, if |lock_| comes immediately before |modules_|
// with the current class layout, we will start to have mysterious crashes
// on Mac 10.9 debug. I (Tommi) suspect we're hitting some obscure alignemnt
// issues, but I haven't figured out what they are, if there are alignment
// requirements for mutexes on Mac or if there's something else to it.
// So be careful with changing the layout.
rtc::CriticalSection lock_; // Used to guard modules_, tasks_ and stop_.
rtc::ThreadChecker thread_checker_;
const rtc::scoped_ptr<EventWrapper> wake_up_;
// TODO(pbos): Remove scoped_ptr and stop recreating the thread.
rtc::scoped_ptr<rtc::PlatformThread> thread_;
ModuleList modules_;
// TODO(tommi): Support delayed tasks.
std::queue<ProcessTask*> queue_;
bool stop_;
const char* thread_name_;
};
} // namespace webrtc
#endif // WEBRTC_MODULES_UTILITY_SOURCE_PROCESS_THREAD_IMPL_H_
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