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// Copyright (c) 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_CONNECTION_LINUX_H_
#define DEVICE_HID_HID_CONNECTION_LINUX_H_
#include <queue>
#include "base/files/file.h"
#include "base/memory/weak_ptr.h"
#include "device/hid/hid_connection.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace device {
class HidConnectionLinux : public HidConnection {
public:
HidConnectionLinux(
const HidDeviceInfo& device_info,
base::File device_file,
scoped_refptr<base::SingleThreadTaskRunner> file_thread_runner);
private:
class Helper;
friend class Helper;
friend class base::RefCountedThreadSafe<HidConnectionLinux>;
typedef base::Callback<void(ssize_t)> InternalWriteCallback;
typedef base::Callback<void(int)> IoctlCallback;
~HidConnectionLinux() override;
// HidConnection implementation.
void PlatformClose() override;
void PlatformRead(const ReadCallback& callback) override;
void PlatformWrite(scoped_refptr<net::IOBuffer> buffer,
size_t size,
const WriteCallback& callback) override;
void PlatformGetFeatureReport(uint8_t report_id,
const ReadCallback& callback) override;
void PlatformSendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
size_t size,
const WriteCallback& callback) override;
// Callbacks for blocking operations run on the FILE thread.
void FinishWrite(size_t expected_size,
const WriteCallback& callback,
ssize_t result);
void FinishGetFeatureReport(uint8_t report_id,
scoped_refptr<net::IOBuffer> buffer,
const ReadCallback& callback,
int result);
void FinishSendFeatureReport(const WriteCallback& callback, int result);
// Writes to the device. This operation may block.
static void BlockingWrite(
base::PlatformFile platform_file,
scoped_refptr<net::IOBuffer> buffer,
size_t size,
const InternalWriteCallback& callback,
scoped_refptr<base::SingleThreadTaskRunner> task_runner);
// Performs an ioctl on the device. This operation may block.
static void BlockingIoctl(
base::PlatformFile platform_file,
int request,
scoped_refptr<net::IOBuffer> buffer,
const IoctlCallback& callback,
scoped_refptr<base::SingleThreadTaskRunner> task_runner);
// Closes the device file descriptor. Must be called on the FILE thread.
static void CloseDevice(base::File device_file);
void ProcessInputReport(scoped_refptr<net::IOBuffer> buffer, size_t size);
void ProcessReadQueue();
base::File device_file_;
Helper* helper_;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
std::queue<PendingHidReport> pending_reports_;
std::queue<PendingHidRead> pending_reads_;
base::WeakPtrFactory<HidConnectionLinux> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(HidConnectionLinux);
};
} // namespace device
#endif // DEVICE_HID_HID_CONNECTION_LINUX_H_