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// Copyright 2013 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/device_orientation/device_motion_service.h"
#include "base/bind.h"
#include "base/logging.h"
#include "base/memory/singleton.h"
#include "content/browser/device_orientation/device_motion_provider.h"
#include "content/public/browser/render_process_host.h"
namespace content {
DeviceMotionService::DeviceMotionService()
: num_readers_(0),
is_shutdown_(false) {
}
DeviceMotionService::~DeviceMotionService() {
}
DeviceMotionService* DeviceMotionService::GetInstance() {
return Singleton<DeviceMotionService,
LeakySingletonTraits<DeviceMotionService> >::get();
}
void DeviceMotionService::AddConsumer() {
DCHECK(thread_checker_.CalledOnValidThread());
if (is_shutdown_)
return;
num_readers_++;
DCHECK(num_readers_ > 0);
if (!provider_.get())
provider_.reset(new DeviceMotionProvider);
provider_->StartFetchingDeviceMotionData();
}
void DeviceMotionService::RemoveConsumer() {
DCHECK(thread_checker_.CalledOnValidThread());
if (is_shutdown_)
return;
--num_readers_;
DCHECK(num_readers_ >= 0);
if (num_readers_ == 0) {
LOG(INFO) << "ACTIVE service stop fetching";
provider_->StopFetchingDeviceMotionData();
}
}
void DeviceMotionService::Shutdown() {
provider_.reset();
is_shutdown_ = true;
}
base::SharedMemoryHandle DeviceMotionService::GetSharedMemoryHandleForProcess(
base::ProcessHandle handle) {
DCHECK(thread_checker_.CalledOnValidThread());
return provider_->GetSharedMemoryHandleForProcess(handle);
}
} // namespace content
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