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/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <lha_internal.h>
#include <sys/time.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <clplumbing/timers.h>
#include <clplumbing/cl_log.h>
#include <clplumbing/cl_signal.h>
#include <clplumbing/longclock.h>
int
setmsrepeattimer(long ms)
{
long secs = ms / 1000L;
long usecs = (ms % 1000L)*1000L;
struct itimerval nexttime =
{ {secs, usecs} /* Repeat Interval */
, {secs, usecs} /* Timer Value */
};
#if 0
cl_log(LOG_DEBUG, "Setting repeating timer for %ld ms"
, ms);
#endif
/* Is this right??? */
CL_IGNORE_SIG(SIGALRM);
return setitimer(ITIMER_REAL, &nexttime, NULL);
}
int
setmsalarm(long ms)
{
long secs = ms / 1000L;
long usecs = (ms % 1000L)*1000L;
struct itimerval nexttime =
{ {0L, 0L} /* Repeat Interval */
, {secs, usecs} /* Timer Value */
};
return setitimer(ITIMER_REAL, &nexttime, NULL);
}
int
cancelmstimer(void)
{
struct itimerval nexttime =
{ {0L, 0L} /* Repeat Interval */
, {0L, 0L} /* Timer Value */
};
return setitimer(ITIMER_REAL, &nexttime, NULL);
}
static int alarmpopped = 0;
static void
st_timer_handler(int nsig)
{
++alarmpopped;
}
/*
* Pretty simple:
* 1) Set up SIGALRM signal handler
* 2) set alarmpopped to FALSE;
* 2) Record current time
* 3) Call setmsalarm(ms)
* 4) Call pause(2)
* 5) Call cancelmstimer()
* 6) Reset signal handler
* 7) See if SIGALRM happened
* if so: return zero
* if not: get current time, and compute milliseconds left 'til signal
* should arrive, and return that...
*/
long
mssleep(long ms)
{
struct sigaction saveaction;
longclock_t start;
longclock_t finish;
unsigned long elapsedms;
memset(&saveaction, 0, sizeof(saveaction));
cl_signal_set_simple_handler(SIGALRM, st_timer_handler, &saveaction);
alarmpopped = 0;
start = time_longclock();
setmsalarm(ms);
pause();
cancelmstimer();
cl_signal_set_simple_handler(SIGALRM, saveaction.sa_handler, &saveaction);
if (alarmpopped) {
return 0;
}
finish = time_longclock();
elapsedms = longclockto_ms(sub_longclock(finish, start));
return ms - elapsedms;
}
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