minix/lib/syslib/sys_signalrm.c
2005-04-21 14:53:53 +00:00

26 lines
942 B
C

#include "syslib.h"
/*===========================================================================*
* sys_signalrm *
*===========================================================================*/
PUBLIC int sys_signalrm(proc_nr, ticks)
int proc_nr; /* process to send SYN_ALARM message to */
clock_t *ticks; /* how many ticks / return ticks left here */
{
/* Ask the clock to schedule a synchronous alarm for the caller. The process
* number can be SELF if the caller doesn't know its process number.
*/
message m;
int s;
m.m_type= SYS_SIGNALRM; /* the alarm type requested */
m.ALRM_PROC_NR = proc_nr; /* receiving process */
m.ALRM_EXP_TIME = *ticks; /* the expiration time */
m.ALRM_ABS_TIME = 0; /* ticks are relative to now */
s = _taskcall(SYSTASK, SYS_SIGNALRM, &m);
*ticks = m.ALRM_TIME_LEFT; /* returned by SYSTEM task */
return s;
}