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92ea95e34a
In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC from src/webrtc to src/ (in order to preserve an healthy git history). This CL takes care of fixing header guards, #include paths, etc... NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578 Reviewed-on: https://webrtc-review.googlesource.com/1561 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19846}
124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
/*
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* Copyright (c) 2015 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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#ifndef RTC_BASE_PLATFORM_THREAD_H_
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#define RTC_BASE_PLATFORM_THREAD_H_
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#include <string>
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#include "rtc_base/constructormagic.h"
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#include "rtc_base/event.h"
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#include "rtc_base/platform_thread_types.h"
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#include "rtc_base/thread_checker.h"
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namespace rtc {
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PlatformThreadId CurrentThreadId();
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PlatformThreadRef CurrentThreadRef();
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// Compares two thread identifiers for equality.
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bool IsThreadRefEqual(const PlatformThreadRef& a, const PlatformThreadRef& b);
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// Sets the current thread name.
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void SetCurrentThreadName(const char* name);
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// Callback function that the spawned thread will enter once spawned.
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// A return value of false is interpreted as that the function has no
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// more work to do and that the thread can be released.
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typedef bool (*ThreadRunFunctionDeprecated)(void*);
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typedef void (*ThreadRunFunction)(void*);
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enum ThreadPriority {
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#ifdef WEBRTC_WIN
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kLowPriority = THREAD_PRIORITY_BELOW_NORMAL,
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kNormalPriority = THREAD_PRIORITY_NORMAL,
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kHighPriority = THREAD_PRIORITY_ABOVE_NORMAL,
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kHighestPriority = THREAD_PRIORITY_HIGHEST,
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kRealtimePriority = THREAD_PRIORITY_TIME_CRITICAL
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#else
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kLowPriority = 1,
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kNormalPriority = 2,
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kHighPriority = 3,
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kHighestPriority = 4,
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kRealtimePriority = 5
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#endif
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};
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// Represents a simple worker thread. The implementation must be assumed
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// to be single threaded, meaning that all methods of the class, must be
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// called from the same thread, including instantiation.
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class PlatformThread {
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public:
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PlatformThread(ThreadRunFunctionDeprecated func,
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void* obj,
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const char* thread_name);
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PlatformThread(ThreadRunFunction func,
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void* obj,
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const char* thread_name,
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ThreadPriority priority = kNormalPriority);
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virtual ~PlatformThread();
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const std::string& name() const { return name_; }
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// Spawns a thread and tries to set thread priority according to the priority
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// from when CreateThread was called.
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void Start();
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bool IsRunning() const;
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// Returns an identifier for the worker thread that can be used to do
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// thread checks.
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PlatformThreadRef GetThreadRef() const;
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// Stops (joins) the spawned thread.
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void Stop();
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// Set the priority of the thread. Must be called when thread is running.
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// TODO(tommi): Make private and only allow public support via ctor.
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bool SetPriority(ThreadPriority priority);
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protected:
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#if defined(WEBRTC_WIN)
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// Exposed to derived classes to allow for special cases specific to Windows.
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bool QueueAPC(PAPCFUNC apc_function, ULONG_PTR data);
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#endif
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private:
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void Run();
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ThreadRunFunctionDeprecated const run_function_deprecated_ = nullptr;
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ThreadRunFunction const run_function_ = nullptr;
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const ThreadPriority priority_ = kNormalPriority;
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void* const obj_;
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// TODO(pbos): Make sure call sites use string literals and update to a const
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// char* instead of a std::string.
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const std::string name_;
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rtc::ThreadChecker thread_checker_;
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rtc::ThreadChecker spawned_thread_checker_;
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#if defined(WEBRTC_WIN)
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static DWORD WINAPI StartThread(void* param);
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bool stop_ = false;
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HANDLE thread_ = nullptr;
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DWORD thread_id_ = 0;
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#else
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static void* StartThread(void* param);
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// An atomic flag that we use to stop the thread. Only modified on the
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// controlling thread and checked on the worker thread.
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volatile int stop_flag_ = 0;
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pthread_t thread_ = 0;
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#endif // defined(WEBRTC_WIN)
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RTC_DISALLOW_COPY_AND_ASSIGN(PlatformThread);
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};
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} // namespace rtc
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#endif // RTC_BASE_PLATFORM_THREAD_H_
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