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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 "content/browser/gamepad/gamepad_service.h"
#include "base/bind.h"
#include "base/logging.h"
#include "base/memory/singleton.h"
#include "content/browser/gamepad/gamepad_data_fetcher.h"
#include "content/browser/gamepad/gamepad_provider.h"
#include "content/public/browser/render_process_host.h"
namespace content {
GamepadService::GamepadService() : num_readers_(0) {
}
GamepadService::GamepadService(scoped_ptr<GamepadDataFetcher> fetcher)
: num_readers_(0),
provider_(new GamepadProvider(fetcher.Pass())) {
thread_checker_.DetachFromThread();
}
GamepadService::~GamepadService() {
}
GamepadService* GamepadService::GetInstance() {
return Singleton<GamepadService,
LeakySingletonTraits<GamepadService> >::get();
}
void GamepadService::AddConsumer() {
DCHECK(thread_checker_.CalledOnValidThread());
num_readers_++;
DCHECK(num_readers_ > 0);
if (!provider_)
provider_.reset(new GamepadProvider);
provider_->Resume();
}
void GamepadService::RemoveConsumer() {
DCHECK(thread_checker_.CalledOnValidThread());
--num_readers_;
DCHECK(num_readers_ >= 0);
if (num_readers_ == 0)
provider_->Pause();
}
void GamepadService::RegisterForUserGesture(const base::Closure& closure) {
DCHECK(num_readers_ > 0);
DCHECK(thread_checker_.CalledOnValidThread());
provider_->RegisterForUserGesture(closure);
}
void GamepadService::Terminate() {
provider_.reset();
}
base::SharedMemoryHandle GamepadService::GetSharedMemoryHandleForProcess(
base::ProcessHandle handle) {
DCHECK(thread_checker_.CalledOnValidThread());
return provider_->GetSharedMemoryHandleForProcess(handle);
}
} // namespace content
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