chrome/browser/devtools/refcounted_adb_thread.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/devtools/refcounted_adb_thread.h"
   6
   7 #include "content/public/browser/browser_thread.h"
   8
   9 using content::BrowserThread;
  10
  11 const char kDevToolsAdbBridgeThreadName[] = "Chrome_DevToolsADBThread";
  12
  13 RefCountedAdbThread* RefCountedAdbThread::instance_ = NULL;
  14
  15 // static
  16 scoped_refptr<RefCountedAdbThread> RefCountedAdbThread::GetInstance() {
  17   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  18   if (!instance_)
  19     new RefCountedAdbThread();
  20   return instance_;
  21 }
  22
  23 RefCountedAdbThread::RefCountedAdbThread() {
  24   instance_ = this;
  25   thread_ = new base::Thread(kDevToolsAdbBridgeThreadName);
  26   base::Thread::Options options;
  27   options.message_loop_type = base::MessageLoop::TYPE_IO;
  28   if (!thread_->StartWithOptions(options)) {
  29     delete thread_;
  30     thread_ = NULL;
  31   }
  32 }
  33
  34 base::MessageLoop* RefCountedAdbThread::message_loop() {
  35   return thread_ ? thread_->message_loop() : NULL;
  36 }
  37
  38 // static
  39 void RefCountedAdbThread::StopThread(base::Thread* thread) {
  40   thread->Stop();
  41 }
  42
  43 RefCountedAdbThread::~RefCountedAdbThread() {
  44   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  45   instance_ = NULL;
  46   if (!thread_)
  47     return;
  48   // Shut down thread on FILE thread to join into IO.
  49   BrowserThread::PostTask(
  50       BrowserThread::FILE, FROM_HERE,
  51       base::Bind(&RefCountedAdbThread::StopThread, thread_));
  52 }