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

23 lines
925 B
C

#include "syslib.h"
/*===========================================================================*
* sys_flagalrm *
*===========================================================================*/
PUBLIC int sys_flagalrm(ticks, flag_ptr)
clock_t ticks; /* number of ticks until the flag is set */
int *flag_ptr; /* pointer to timeout flag to be set */
{
/* Make a call to the clock to schedule a timeout flag alarm for the caller. */
message m;
if (flag_ptr != NULL) /* expect the worst */
*flag_ptr = 0; /* reset timeout flag first */
m.m_type = SYS_FLAGALRM; /* alarm type requested */
m.ALRM_PROC_NR = SELF; /* m_source will be used */
m.ALRM_EXP_TIME = ticks; /* alarm is due after ticks */
m.ALRM_ABS_TIME = 0; /* ticks are relative to now */
m.ALRM_FLAG_PTR = (char *) flag_ptr;
return _taskcall(SYSTASK, SYS_FLAGALRM, &m);
}