smart_fd.h

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/*
 * smart_fd.h
 *
 * Copyright 2002 Thomas A. Vaughan
 * All rights reserved.
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the <organization> nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THOMAS A. VAUGHAN ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THOMAS A. VAUGHAN BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * smart file descriptor wrapper.
 */

#ifndef WAVEPACKET_SMART_FD_H__
#define WAVEPACKET_SMART_FD_H__


/*
 * smart file descriptor class
 */
class smart_fd
{
public:
        // constructor, destructor ---------------------------------------------
        smart_fd(int fd = -1) throw() : m_fd(fd) { }
        ~smart_fd(void) throw() { this->close(); }

        // accessors -----------------------------------------------------------
        operator int (void) throw()
                {
                        return m_fd;
                }

        int get(void) throw()
                {
                        return m_fd;
                }

        int release(void) throw()
                {
                        int fd = m_fd;
                        m_fd = -1;
                        return fd;
                }

        void close(void) throw()
                {
                        if (m_fd >= 0)
				::close(m_fd);
                        m_fd = -1;
                }

        void reset(IN int fd) throw()
                {
                        this->close();
                        m_fd = fd;
                }

private:
        smart_fd(IN const smart_fd&) throw();
        const smart_fd& operator = (IN const smart_fd&) throw();

        // private member data -------------------------------------------------
        int     m_fd;   // the file descriptor
};


#endif  // WAVEPACKET_SMART_FD_H__