Move base/thread.h to base/threading, fix up callers to use the new location....

base/thread.cc

-// Copyright (c) 2006-2009 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/thread.h"
-
-#include "base/lazy_instance.h"
-#include "base/third_party/dynamic_annotations/dynamic_annotations.h"
-#include "base/threading/thread_local.h"
-#include "base/waitable_event.h"
-
-namespace base {
-
-// This task is used to trigger the message loop to exit.
-class ThreadQuitTask : public Task {
- public:
-  virtual void Run() {
-    MessageLoop::current()->Quit();
-    Thread::SetThreadWasQuitProperly(true);
-  }
-};
-
-// Used to pass data to ThreadMain.  This structure is allocated on the stack
-// from within StartWithOptions.
-struct Thread::StartupData {
-  // We get away with a const reference here because of how we are allocated.
-  const Thread::Options& options;
-
-  // Used to synchronize thread startup.
-  WaitableEvent event;
-
-  explicit StartupData(const Options& opt)
-      : options(opt),
-        event(false, false) {}
-};
-
-Thread::Thread(const char* name)
-    : started_(false),
-      stopping_(false),
-      startup_data_(NULL),
-      thread_(0),
-      message_loop_(NULL),
-      thread_id_(kInvalidThreadId),
-      name_(name) {
-}
-
-Thread::~Thread() {
-  Stop();
-}
-
-namespace {
-
-// We use this thread-local variable to record whether or not a thread exited
-// because its Stop method was called.  This allows us to catch cases where
-// MessageLoop::Quit() is called directly, which is unexpected when using a
-// Thread to setup and run a MessageLoop.
-base::LazyInstance<base::ThreadLocalBoolean> lazy_tls_bool(
-    base::LINKER_INITIALIZED);
-
-}  // namespace
-
-void Thread::SetThreadWasQuitProperly(bool flag) {
-  lazy_tls_bool.Pointer()->Set(flag);
-}
-
-bool Thread::GetThreadWasQuitProperly() {
-  bool quit_properly = true;
-#ifndef NDEBUG
-  quit_properly = lazy_tls_bool.Pointer()->Get();
-#endif
-  return quit_properly;
-}
-
-bool Thread::Start() {
-  return StartWithOptions(Options());
-}
-
-bool Thread::StartWithOptions(const Options& options) {
-  DCHECK(!message_loop_);
-
-  SetThreadWasQuitProperly(false);
-
-  StartupData startup_data(options);
-  startup_data_ = &startup_data;
-
-  if (!PlatformThread::Create(options.stack_size, this, &thread_)) {
-    DLOG(ERROR) << "failed to create thread";
-    startup_data_ = NULL;
-    return false;
-  }
-
-  // Wait for the thread to start and initialize message_loop_
-  startup_data.event.Wait();
-
-  // set it to NULL so we don't keep a pointer to some object on the stack.
-  startup_data_ = NULL;
-  started_ = true;
-
-  DCHECK(message_loop_);
-  return true;
-}
-
-void Thread::Stop() {
-  if (!thread_was_started())
-    return;
-
-  StopSoon();
-
-  // Wait for the thread to exit.
-  //
-  // TODO(darin): Unfortunately, we need to keep message_loop_ around until
-  // the thread exits.  Some consumers are abusing the API.  Make them stop.
-  //
-  PlatformThread::Join(thread_);
-
-  // The thread should NULL message_loop_ on exit.
-  DCHECK(!message_loop_);
-
-  // The thread no longer needs to be joined.
-  started_ = false;
-
-  stopping_ = false;
-}
-
-void Thread::StopSoon() {
-  // We should only be called on the same thread that started us.
-
-  // Reading thread_id_ without a lock can lead to a benign data race
-  // with ThreadMain, so we annotate it to stay silent under ThreadSanitizer.
-  DCHECK_NE(ANNOTATE_UNPROTECTED_READ(thread_id_), PlatformThread::CurrentId());
-
-  if (stopping_ || !message_loop_)
-    return;
-
-  stopping_ = true;
-  message_loop_->PostTask(FROM_HERE, new ThreadQuitTask());
-}
-
-void Thread::Run(MessageLoop* message_loop) {
-  message_loop->Run();
-}
-
-void Thread::ThreadMain() {
-  {
-    // The message loop for this thread.
-    MessageLoop message_loop(startup_data_->options.message_loop_type);
-
-    // Complete the initialization of our Thread object.
-    thread_id_ = PlatformThread::CurrentId();
-    PlatformThread::SetName(name_.c_str());
-    ANNOTATE_THREAD_NAME(name_.c_str());  // Tell the name to race detector.
-    message_loop.set_thread_name(name_);
-    message_loop_ = &message_loop;
-    message_loop_proxy_ = MessageLoopProxy::CreateForCurrentThread();
-
-    // Let the thread do extra initialization.
-    // Let's do this before signaling we are started.
-    Init();
-
-    startup_data_->event.Signal();
-    // startup_data_ can't be touched anymore since the starting thread is now
-    // unlocked.
-
-    Run(message_loop_);
-
-    // Let the thread do extra cleanup.
-    CleanUp();
-
-    // Assert that MessageLoop::Quit was called by ThreadQuitTask.
-    DCHECK(GetThreadWasQuitProperly());
-
-    // We can't receive messages anymore.
-    message_loop_ = NULL;
-    message_loop_proxy_ = NULL;
-  }
-  CleanUpAfterMessageLoopDestruction();
-  thread_id_ = kInvalidThreadId;
-}
-
-}  // namespace base