device.h

来自「Linux下比较早的基于命令行的DVD播放器」· C头文件 代码 · 共 71 行

//
// Copyright (c) 2002 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef DXR3PLAYER_UTIL_DEVICE_H
#define DXR3PLAYER_UTIL_DEVICE_H
//------------------------------------------------------------------------------

#include "util/FileDescriptor.h"

//------------------------------------------------------------------------------

/**
 * Device file. On any I/O error, it simply aborts the program.
 *
 * It is a mixin, which has its ultimate base class a FileDescriptor.
 */
template <class Super = FileDescriptor>
class Device : public Super
{
protected:
    /**
     * Import 'fd' from the superclass.
     */
    Super::fd;

public:
    /**
     * Perform an ioctl request on the device.
     */
    void ioctl(int request, void* argument,
               const char* errorMessage = "ioctl", ...);
};

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

template <class Super>
inline void Device<Super>::ioctl(int request, void* argument,
                                 const char* errorMessage, ...)
{
    va_list ap;
    va_start(ap, errorMessage);

    POSIX::ioctl(fd, request, argument, errorMessage, ap);
}

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_UTIL_DEVICE_H

// Local variables:
// mode: c++
// End: