cc/trees/proxy.cc

   1 // Copyright 2011 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 "cc/trees/proxy.h"
   6
   7 #include "base/message_loop/message_loop_proxy.h"
   8 #include "base/single_thread_task_runner.h"
   9
  10 namespace cc {
  11
  12 base::SingleThreadTaskRunner* Proxy::MainThreadTaskRunner() const {
  13   return main_task_runner_.get();
  14 }
  15
  16 bool Proxy::HasImplThread() const { return !!impl_task_runner_.get(); }
  17
  18 base::SingleThreadTaskRunner* Proxy::ImplThreadTaskRunner() const {
  19   return impl_task_runner_.get();
  20 }
  21
  22 bool Proxy::IsMainThread() const {
  23 #if DCHECK_IS_ON
  24   if (impl_thread_is_overridden_)
  25     return false;
  26
  27   bool is_main_thread = base::PlatformThread::CurrentId() == main_thread_id_;
  28   if (is_main_thread && main_task_runner_.get()) {
  29     DCHECK(main_task_runner_->BelongsToCurrentThread());
  30   }
  31   return is_main_thread;
  32 #else
  33   return true;
  34 #endif
  35 }
  36
  37 bool Proxy::IsImplThread() const {
  38 #if DCHECK_IS_ON
  39   if (impl_thread_is_overridden_)
  40     return true;
  41   if (!impl_task_runner_.get())
  42     return false;
  43   return impl_task_runner_->BelongsToCurrentThread();
  44 #else
  45   return true;
  46 #endif
  47 }
  48
  49 #if DCHECK_IS_ON
  50 void Proxy::SetCurrentThreadIsImplThread(bool is_impl_thread) {
  51   impl_thread_is_overridden_ = is_impl_thread;
  52 }
  53 #endif
  54
  55 bool Proxy::IsMainThreadBlocked() const {
  56 #if DCHECK_IS_ON
  57   return is_main_thread_blocked_;
  58 #else
  59   return true;
  60 #endif
  61 }
  62
  63 #if DCHECK_IS_ON
  64 void Proxy::SetMainThreadBlocked(bool is_main_thread_blocked) {
  65   is_main_thread_blocked_ = is_main_thread_blocked;
  66 }
  67 #endif
  68
  69 Proxy::Proxy(scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
  70     : main_task_runner_(base::MessageLoopProxy::current()),
  71 #if !DCHECK_IS_ON
  72       impl_task_runner_(impl_task_runner) {
  73 #else
  74       impl_task_runner_(impl_task_runner),
  75       main_thread_id_(base::PlatformThread::CurrentId()),
  76       impl_thread_is_overridden_(false),
  77       is_main_thread_blocked_(false) {
  78 #endif
  79 }
  80
  81 Proxy::~Proxy() {
  82   DCHECK(IsMainThread());
  83 }
  84
  85 scoped_ptr<base::Value> Proxy::SchedulerAsValueForTesting() {
  86   return make_scoped_ptr(base::Value::CreateNullValue());
  87 }
  88
  89 }  // namespace cc