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/*
* @(#)timer.c
*
* Copyright 2005 - 2013 David A. Bagley, bagleyd AT verizon.net
*
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of the author not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* 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.
*/
/* Methods file for timer */
#include "timer.h"
#ifndef WINVER
#ifndef HAVE_USLEEP
#if !defined( VMS ) || defined( XVMSUTILS ) || ( __VMS_VER >= 70000000 )
#ifdef USE_XVMSUTILS
#include <X11/unix_time.h>
#endif
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#endif
#endif
#if defined(SYSV) || defined(SVR4)
#ifdef LESS_THAN_AIX3_2
#include <sys/poll.h>
#else /* !LESS_THAN_AIX3_2 */
#include <poll.h>
#endif /* !LESS_THAN_AIX3_2 */
#endif /* defined(SYSV) || defined(SVR4) */
/* not static in case usleep found in system include */
int
usleep(unsigned int usec)
{
#if (defined (SYSV) || defined(SVR4)) && !defined(__hpux)
#if defined(HAVE_NANOSLEEP)
{
struct timespec rqt;
rqt.tv_nsec = 1000 * (usec % (unsigned int) 1000000);
rqt.tv_sec = usec / (unsigned int) 1000000;
return nanosleep(&rqt, NULL);
}
#else
(void) poll(
#if defined(__cplusplus) || defined(c_plusplus)
(pollfd *) /* guess */
#else
(void *)
#endif
0, (int) 0, usec / 1000); /* ms resolution */
#endif
#else
#ifdef VMS
long timadr[2];
if (usec != 0) {
timadr[0] = -usec * 10;
timadr[1] = -1;
sys$setimr(4, &timadr, 0, 0, 0);
sys$waitfr(4);
}
#else
struct timeval time_out;
#if 0
/* (!defined(AIXV3) && !defined(__hpux)) */
extern int select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
#endif
time_out.tv_usec = usec % (unsigned int) 1000000;
time_out.tv_sec = usec / (unsigned int) 1000000;
(void) select(0, (void *) 0, (void *) 0, (void *) 0, &time_out);
#endif
#endif
return 0;
}
#endif
#if (!defined(WINVER) || (WINVER <= 0x030a)) /* if X or WINDOWS 3.1 or less */
void
Sleep(unsigned int cMilliseconds)
{
#if (defined(WINVER) && (WINVER <= 0x030a))
unsigned long time_out = GetTickCount() + cMilliseconds;
while (time_out > GetTickCount());
#else
(void) usleep(cMilliseconds * 1000);
#endif
}
#endif
#endif
void
useTimer(TimeVal * oldTime, int delay)
{
int sleepTime;
#ifdef WINVER
long tv = (long) GetTickCount();
sleepTime = delay - (tv - (*oldTime));
*oldTime = tv;
if (sleepTime > 0) {
Sleep((unsigned int) sleepTime);
}
#else
struct timeval tv;
(void) X_GETTIMEOFDAY(&tv);
sleepTime = delay * 1000 -
((tv.tv_sec - (*oldTime).tv_sec) * 1000000 +
tv.tv_usec - (*oldTime).tv_usec);
(*oldTime).tv_sec = tv.tv_sec;
(*oldTime).tv_usec = tv.tv_usec;
if (sleepTime > 0) {
(void) usleep((unsigned int) sleepTime);
}
#endif
}
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