Reland "Move webrtc/{base => rtc_base}" (https://codereview.webrtc.org/2877023002)
Reland the base->rtc_base without adding stub headers (will be
done in follow-up CL). This preserves git blame history of all files.
BUG=webrtc:7634
NOTRY=True
TBR=kwiberg@webrtc.org
Change-Id: Iea3bb6f3f67b8374c96337b63e8f5aa3e6181012
Reviewed-on: https://chromium-review.googlesource.com/554611
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18821}diff --git a/webrtc/rtc_base/platform_thread.h b/webrtc/rtc_base/platform_thread.h
new file mode 100644
index 0000000..84f2b67
--- /dev/null
+++ b/webrtc/rtc_base/platform_thread.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2015 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_RTC_BASE_PLATFORM_THREAD_H_
+#define WEBRTC_RTC_BASE_PLATFORM_THREAD_H_
+
+#include <string>
+
+#include "webrtc/base/constructormagic.h"
+#include "webrtc/base/event.h"
+#include "webrtc/base/platform_thread_types.h"
+#include "webrtc/base/thread_checker.h"
+
+namespace rtc {
+
+PlatformThreadId CurrentThreadId();
+PlatformThreadRef CurrentThreadRef();
+
+// Compares two thread identifiers for equality.
+bool IsThreadRefEqual(const PlatformThreadRef& a, const PlatformThreadRef& b);
+
+// Sets the current thread name.
+void SetCurrentThreadName(const char* name);
+
+// Callback function that the spawned thread will enter once spawned.
+// A return value of false is interpreted as that the function has no
+// more work to do and that the thread can be released.
+typedef bool (*ThreadRunFunctionDeprecated)(void*);
+typedef void (*ThreadRunFunction)(void*);
+
+enum ThreadPriority {
+#ifdef WEBRTC_WIN
+ kLowPriority = THREAD_PRIORITY_BELOW_NORMAL,
+ kNormalPriority = THREAD_PRIORITY_NORMAL,
+ kHighPriority = THREAD_PRIORITY_ABOVE_NORMAL,
+ kHighestPriority = THREAD_PRIORITY_HIGHEST,
+ kRealtimePriority = THREAD_PRIORITY_TIME_CRITICAL
+#else
+ kLowPriority = 1,
+ kNormalPriority = 2,
+ kHighPriority = 3,
+ kHighestPriority = 4,
+ kRealtimePriority = 5
+#endif
+};
+
+// Represents a simple worker thread. The implementation must be assumed
+// to be single threaded, meaning that all methods of the class, must be
+// called from the same thread, including instantiation.
+class PlatformThread {
+ public:
+ PlatformThread(ThreadRunFunctionDeprecated func,
+ void* obj,
+ const char* thread_name);
+ PlatformThread(ThreadRunFunction func,
+ void* obj,
+ const char* thread_name,
+ ThreadPriority priority = kNormalPriority);
+ virtual ~PlatformThread();
+
+ const std::string& name() const { return name_; }
+
+ // Spawns a thread and tries to set thread priority according to the priority
+ // from when CreateThread was called.
+ void Start();
+
+ bool IsRunning() const;
+
+ // Returns an identifier for the worker thread that can be used to do
+ // thread checks.
+ PlatformThreadRef GetThreadRef() const;
+
+ // Stops (joins) the spawned thread.
+ void Stop();
+
+ // Set the priority of the thread. Must be called when thread is running.
+ // TODO(tommi): Make private and only allow public support via ctor.
+ bool SetPriority(ThreadPriority priority);
+
+ protected:
+#if defined(WEBRTC_WIN)
+ // Exposed to derived classes to allow for special cases specific to Windows.
+ bool QueueAPC(PAPCFUNC apc_function, ULONG_PTR data);
+#endif
+
+ private:
+ void Run();
+
+ ThreadRunFunctionDeprecated const run_function_deprecated_ = nullptr;
+ ThreadRunFunction const run_function_ = nullptr;
+ const ThreadPriority priority_ = kNormalPriority;
+ void* const obj_;
+ // TODO(pbos): Make sure call sites use string literals and update to a const
+ // char* instead of a std::string.
+ const std::string name_;
+ rtc::ThreadChecker thread_checker_;
+ rtc::ThreadChecker spawned_thread_checker_;
+#if defined(WEBRTC_WIN)
+ static DWORD WINAPI StartThread(void* param);
+
+ bool stop_ = false;
+ HANDLE thread_ = nullptr;
+ DWORD thread_id_ = 0;
+#else
+ static void* StartThread(void* param);
+
+ // An atomic flag that we use to stop the thread. Only modified on the
+ // controlling thread and checked on the worker thread.
+ volatile int stop_flag_ = 0;
+ pthread_t thread_ = 0;
+#endif // defined(WEBRTC_WIN)
+ RTC_DISALLOW_COPY_AND_ASSIGN(PlatformThread);
+};
+
+} // namespace rtc
+
+#endif // WEBRTC_RTC_BASE_PLATFORM_THREAD_H_