ac9ab099c8
- clean up kernel section of minix/com.h somewhat - remove ALLOCMEM and VM_ALLOCMEM calls - remove non-safecopy and minix-vmd support from Inet - remove SYS_VIRVCOPY and SYS_PHYSVCOPY calls - remove obsolete segment encoding in SYS_SAFECOPY* - remove DEVCTL call, svrctl(FSDEVUNMAP), map_driverX - remove declarations of unimplemented svrctl requests - remove everything related to swapping to disk - remove floppysetup.sh - remove traces of rescue device - update DESCRIBE.sh with new devices - some other small changes
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
#include "sysutil.h"
|
|
#include <timers.h>
|
|
|
|
/*===========================================================================*
|
|
* tickdelay *
|
|
*===========================================================================*/
|
|
PUBLIC int tickdelay(ticks)
|
|
long ticks; /* number of ticks to wait */
|
|
{
|
|
/* This function uses the synchronous alarm to delay for a while. This works
|
|
* even if a previous synchronous alarm was scheduled, because the remaining
|
|
* tick of the previous alarm are returned so that it can be rescheduled.
|
|
* Note however that a long tick_delay (longer than the remaining time of the
|
|
* previous) alarm will also delay the previous alarm.
|
|
*/
|
|
message m, m_alarm;
|
|
int s;
|
|
|
|
if (ticks <= 0) return OK; /* check for robustness */
|
|
|
|
m.ALRM_EXP_TIME = ticks; /* request message after ticks */
|
|
m.ALRM_ABS_TIME = 0; /* ticks are relative to now */
|
|
s = _taskcall(SYSTASK, SYS_SETALARM, &m);
|
|
if (s != OK) return(s);
|
|
|
|
receive(CLOCK,&m_alarm); /* await synchronous alarm */
|
|
|
|
/* Check if we must reschedule the current alarm. */
|
|
if (m.ALRM_TIME_LEFT > 0 && m.ALRM_TIME_LEFT != TMR_NEVER) {
|
|
m.ALRM_EXP_TIME = m.ALRM_TIME_LEFT - ticks;
|
|
if (m.ALRM_EXP_TIME <= 0)
|
|
m.ALRM_EXP_TIME = 1;
|
|
s = _taskcall(SYSTASK, SYS_SETALARM, &m);
|
|
}
|
|
|
|
return(s);
|
|
}
|
|
|
|
|
|
|
|
|
|
|