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// 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/plugin_message_loop_proxy.h"
#include "base/bind.h"
namespace remoting {
PluginMessageLoopProxy::PluginMessageLoopProxy(Delegate* delegate)
: plugin_thread_id_(base::PlatformThread::CurrentId()),
delegate_(delegate) {
}
PluginMessageLoopProxy::~PluginMessageLoopProxy() {
}
void PluginMessageLoopProxy::Detach() {
base::AutoLock auto_lock(lock_);
if (delegate_) {
DCHECK(BelongsToCurrentThread());
delegate_ = NULL;
}
}
bool PluginMessageLoopProxy::PostTask(
const tracked_objects::Location& from_here,
const base::Closure& task) {
return PostDelayedTask(from_here, task, 0);
}
bool PluginMessageLoopProxy::PostDelayedTask(
const tracked_objects::Location& from_here,
const base::Closure& task,
int64 delay_ms) {
base::AutoLock auto_lock(lock_);
if (!delegate_)
return false;
base::Closure* springpad_closure = new base::Closure(base::Bind(
&PluginMessageLoopProxy::RunClosureIf, this, task));
return delegate_->RunOnPluginThread(
delay_ms, &PluginMessageLoopProxy::TaskSpringboard, springpad_closure);
}
bool PluginMessageLoopProxy::PostNonNestableTask(
const tracked_objects::Location& from_here,
const base::Closure& task) {
// All tasks running on this message loop are non-nestable.
return PostTask(from_here, task);
}
bool PluginMessageLoopProxy::PostNonNestableDelayedTask(
const tracked_objects::Location& from_here,
const base::Closure& task,
int64 delay_ms) {
// All tasks running on this message loop are non-nestable.
return PostDelayedTask(from_here, task, delay_ms);
}
bool PluginMessageLoopProxy::BelongsToCurrentThread() {
// In pepper plugins ideally we should use pp::Core::IsMainThread,
// but it is problematic because we would need to keep reference to
// Core somewhere, e.g. make the delegate ref-counted.
return base::PlatformThread::CurrentId() == plugin_thread_id_;
}
// static
void PluginMessageLoopProxy::TaskSpringboard(void* data) {
base::Closure* task = reinterpret_cast<base::Closure*>(data);
task->Run();
delete task;
}
void PluginMessageLoopProxy::RunClosureIf(const base::Closure& task) {
// |delegate_| can be changed only from our thread, so it's safe to
// access it without acquiring |lock_|.
if (delegate_)
task.Run();
}
} // namespace remoting
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