base: Support setting thread priorities generically.

remoting/base/auto_thread.cc

 // Copyright (c) 2012 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 "remoting/base/auto_thread.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/threading/thread_local.h"
@@ skipping 74 matching lines @@
     delete thread;
   return task_runner;
 }
 #endif
 
 AutoThread::AutoThread(const char* name)
   : startup_data_(NULL),
 #if defined(OS_WIN)
     com_init_type_(COM_INIT_NONE),
 #endif
-    thread_(0),
+    thread_(),
     name_(name),
     was_quit_properly_(false) {
 }
 
 AutoThread::AutoThread(const char* name, AutoThreadTaskRunner* joiner)
   : startup_data_(NULL),
 #if defined(OS_WIN)
     com_init_type_(COM_INIT_NONE),
 #endif
-    thread_(0),
+    thread_(),
     name_(name),
     was_quit_properly_(false),
     joiner_(joiner) {
 }
 
 AutoThread::~AutoThread() {
   DCHECK(!startup_data_);
 
   // Wait for the thread to exit.
-  if (thread_) {
+  if (!thread_.is_null()) {
     base::PlatformThread::Join(thread_);
   }
 }
 
 scoped_refptr<AutoThreadTaskRunner> AutoThread::StartWithType(
     base::MessageLoop::Type type) {
-  DCHECK(!thread_);
+  DCHECK(thread_.is_null());
 #if defined(OS_WIN)
   DCHECK(com_init_type_ != COM_INIT_STA || type == base::MessageLoop::TYPE_UI);
 #endif
 
   StartupData startup_data(type);
   startup_data_ = &startup_data;
 
   if (!base::PlatformThread::Create(0, this, &thread_)) {
     DLOG(ERROR) << "failed to create thread";
     startup_data_ = NULL;
@@ skipping 71 matching lines @@
       CreateComInitializer(com_init_type_));
 #endif
 
   message_loop.Run();
 
   // Assert that MessageLoop::Quit was called by AutoThread::QuitThread.
   DCHECK(was_quit_properly_);
 }
 
 }  // namespace base