__time.h

介绍：MySQL是比较出名的数据库软件

/* ==== __time.h ============================================================
 * Copyright (c) 1994 by Chris Provenzano, [e-mail]
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by Chris Provenzano.
 * 4. The name of Chris Provenzano may not be used to endorse or promote 
 *	  products derived from this software without specific prior written
 *	  permission.
 *
 * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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.
 *
 * $Id$
 *
 * Description : System specific time header.
 *
 *  1.00 94/11/07 proven
 *      -Started coding this file.
 */
 
#ifndef _SYS___TIME_H_
#define	_SYS___TIME_H_

#include <features.h>

struct timespec
  {
    long int tv_sec;		/* Seconds.  */
    long int tv_nsec;		/* Nanoseconds.  */
  };

#ifndef _SIZE_T
#define _SIZE_T
typedef unsigned int	size_t;
#endif
#ifndef _CLOCK_T
#define _CLOCK_T
typedef long    		clock_t;
#endif
#ifndef _TIME_T
#define _TIME_T
typedef long    		time_t;

#ifndef NULL
#ifdef __cplusplus
#define NULL	0
#else
#define NULL ((void *) 0)
#endif
#endif
#endif

#define CLOCKS_PER_SEC	100
#define CLK_TCK			100

extern long int timezone;
extern int daylight;

#endif