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/single_thread_task_runner.h"
   8 #include "cc/trees/blocking_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> main_task_runner,
  70              scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
  71 #if !DCHECK_IS_ON()
  72     : main_task_runner_(main_task_runner),
  73       impl_task_runner_(impl_task_runner),
  74       blocking_main_thread_task_runner_(
  75           BlockingTaskRunner::Create(main_task_runner)) {
  76 #else
  77     : main_task_runner_(main_task_runner),
  78       impl_task_runner_(impl_task_runner),
  79       blocking_main_thread_task_runner_(
  80           BlockingTaskRunner::Create(main_task_runner)),
  81       main_thread_id_(base::PlatformThread::CurrentId()),
  82       impl_thread_is_overridden_(false),
  83       is_main_thread_blocked_(false) {
  84 #endif
  85 }
  86
  87 Proxy::~Proxy() {
  88   DCHECK(IsMainThread());
  89 }
  90
  91 }  // namespace cc