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// Copyright 2014 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.
#ifndef DEVICE_HID_HID_SERVICE_LINUX_H_
#define DEVICE_HID_HID_SERVICE_LINUX_H_
#include <libudev.h>
#include <map>
#include <string>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_pump_libevent.h"
#include "device/hid/hid_device_info.h"
#include "device/hid/hid_service.h"
namespace device {
class HidConnection;
template<typename T, void func(T*)>
void DiscardReturnType(T* arg) { func(arg); }
template<typename T, T* func(T*)>
void DiscardReturnType(T* arg) { func(arg); }
template<typename T, void func(T*)>
struct Deleter {
void operator()(T* enumerate) const {
if (enumerate != NULL)
func(enumerate);
}
};
typedef Deleter<
udev_enumerate,
DiscardReturnType<udev_enumerate, udev_enumerate_unref> >
UdevEnumerateDeleter;
typedef Deleter<
udev_device,
DiscardReturnType<udev_device, udev_device_unref> > UdevDeviceDeleter;
typedef Deleter<udev, DiscardReturnType<udev, udev_unref> > UdevDeleter;
typedef Deleter<
udev_monitor,
DiscardReturnType<udev_monitor, udev_monitor_unref> > UdevMonitorDeleter;
typedef scoped_ptr<udev_device, UdevDeviceDeleter> ScopedUdevDevicePtr;
typedef scoped_ptr<udev_enumerate, UdevEnumerateDeleter> ScopedUdevEnumeratePtr;
class HidServiceLinux : public HidService,
public base::MessagePumpLibevent::Watcher {
public:
HidServiceLinux();
virtual scoped_refptr<HidConnection> Connect(const HidDeviceId& device_id)
OVERRIDE;
// Implements base::MessagePumpLibevent::Watcher
virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
private:
virtual ~HidServiceLinux();
void Enumerate();
void PlatformAddDevice(udev_device* device);
void PlatformRemoveDevice(udev_device* raw_dev);
scoped_ptr<udev, UdevDeleter> udev_;
scoped_ptr<udev_monitor, UdevMonitorDeleter> monitor_;
int monitor_fd_;
base::MessagePumpLibevent::FileDescriptorWatcher monitor_watcher_;
DISALLOW_COPY_AND_ASSIGN(HidServiceLinux);
};
} // namespace device
#endif // DEVICE_HID_HID_SERVICE_LINUX_H_
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