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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/trees/task_runner_provider.h"
#include "base/task/single_thread_task_runner.h"
namespace cc {
base::SingleThreadTaskRunner* TaskRunnerProvider::MainThreadTaskRunner() const {
return main_task_runner_.get();
}
bool TaskRunnerProvider::HasImplThread() const {
return for_display_tree_ || !!impl_task_runner_.get();
}
base::SingleThreadTaskRunner* TaskRunnerProvider::ImplThreadTaskRunner() const {
return for_display_tree_ ? main_task_runner_.get() : impl_task_runner_.get();
}
bool TaskRunnerProvider::IsMainThread() const {
if (for_display_tree_) {
return true;
}
#if DCHECK_IS_ON()
if (impl_thread_is_overridden_)
return false;
bool is_main_thread = base::PlatformThread::CurrentId() == main_thread_id_;
if (is_main_thread && main_task_runner_.get()) {
DCHECK(main_task_runner_->BelongsToCurrentThread());
}
return is_main_thread;
#else
return true;
#endif
}
bool TaskRunnerProvider::IsImplThread() const {
if (for_display_tree_) {
return true;
}
#if DCHECK_IS_ON()
if (impl_thread_is_overridden_)
return true;
if (!impl_task_runner_.get())
return false;
return impl_task_runner_->BelongsToCurrentThread();
#else
return true;
#endif
}
#if DCHECK_IS_ON()
void TaskRunnerProvider::SetCurrentThreadIsImplThread(bool is_impl_thread) {
impl_thread_is_overridden_ = is_impl_thread;
}
#endif
bool TaskRunnerProvider::IsMainThreadBlocked() const {
if (for_display_tree_) {
// There's no need for thread blocking on the display tree. Since this
// method is used in various places only to assert that the thread is
// blocked (never to assert that it's *not* blocked), we lie to bypass such
// assertions.
return true;
}
#if DCHECK_IS_ON()
return is_main_thread_blocked_;
#else
return true;
#endif
}
#if DCHECK_IS_ON()
void TaskRunnerProvider::SetMainThreadBlocked(bool is_main_thread_blocked) {
is_main_thread_blocked_ = is_main_thread_blocked;
}
#endif
TaskRunnerProvider::TaskRunnerProvider(
scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
#if !DCHECK_IS_ON()
: main_task_runner_(main_task_runner), impl_task_runner_(impl_task_runner) {
#else
: main_task_runner_(main_task_runner),
impl_task_runner_(impl_task_runner),
main_thread_id_(base::PlatformThread::CurrentId()),
impl_thread_is_overridden_(false),
is_main_thread_blocked_(false) {
#endif
}
TaskRunnerProvider::~TaskRunnerProvider() {
DCHECK(IsMainThread());
}
} // namespace cc
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