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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 "webkit/plugins/ppapi/ppb_flash_message_loop_impl.h"
#include "base/callback.h"
#include "base/message_loop/message_loop.h"
#include "ppapi/c/pp_errors.h"
using ppapi::thunk::PPB_Flash_MessageLoop_API;
namespace webkit {
namespace ppapi {
class PPB_Flash_MessageLoop_Impl::State
: public base::RefCounted<PPB_Flash_MessageLoop_Impl::State> {
public:
State() : result_(PP_OK), run_called_(false), quit_called_(false) {
}
int32_t result() const { return result_; }
void set_result(int32_t result) { result_ = result; }
bool run_called() const { return run_called_; }
void set_run_called() { run_called_ = true; }
bool quit_called() const { return quit_called_; }
void set_quit_called() { quit_called_ = true; }
const RunFromHostProxyCallback& run_callback() const { return run_callback_; }
void set_run_callback(const RunFromHostProxyCallback& run_callback) {
run_callback_ = run_callback;
}
private:
int32_t result_;
bool run_called_;
bool quit_called_;
RunFromHostProxyCallback run_callback_;
};
PPB_Flash_MessageLoop_Impl::PPB_Flash_MessageLoop_Impl(PP_Instance instance)
: Resource(::ppapi::OBJECT_IS_IMPL, instance),
state_(new State()) {
}
PPB_Flash_MessageLoop_Impl::~PPB_Flash_MessageLoop_Impl() {
// It is a no-op if either Run() hasn't been called or Quit() has been called
// to balance the call to Run().
InternalQuit(PP_ERROR_ABORTED);
}
// static
PP_Resource PPB_Flash_MessageLoop_Impl::Create(PP_Instance instance) {
return (new PPB_Flash_MessageLoop_Impl(instance))->GetReference();
}
PPB_Flash_MessageLoop_API*
PPB_Flash_MessageLoop_Impl::AsPPB_Flash_MessageLoop_API() {
return this;
}
int32_t PPB_Flash_MessageLoop_Impl::Run() {
return InternalRun(RunFromHostProxyCallback());
}
void PPB_Flash_MessageLoop_Impl::RunFromHostProxy(
const RunFromHostProxyCallback& callback) {
InternalRun(callback);
}
void PPB_Flash_MessageLoop_Impl::Quit() {
InternalQuit(PP_OK);
}
int32_t PPB_Flash_MessageLoop_Impl::InternalRun(
const RunFromHostProxyCallback& callback) {
if (state_->run_called()) {
if (!callback.is_null())
callback.Run(PP_ERROR_FAILED);
return PP_ERROR_FAILED;
}
state_->set_run_called();
state_->set_run_callback(callback);
// It is possible that the PPB_Flash_MessageLoop_Impl object has been
// destroyed when the nested message loop exits.
scoped_refptr<State> state_protector(state_);
{
base::MessageLoop::ScopedNestableTaskAllower allow(
base::MessageLoop::current());
base::MessageLoop::current()->Run();
}
// Don't access data members of the class below.
return state_protector->result();
}
void PPB_Flash_MessageLoop_Impl::InternalQuit(int32_t result) {
if (!state_->run_called() || state_->quit_called())
return;
state_->set_quit_called();
state_->set_result(result);
base::MessageLoop::current()->QuitNow();
if (!state_->run_callback().is_null())
state_->run_callback().Run(result);
}
} // namespace ppapi
} // namespace webkit
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