9fab85c2de
* Renamed struct timer to struct minix_timer * Renamed timer_t to minix_timer_t * Ensured all the code uses the minix_timer_t typedef * Removed ifdef around _BSD_TIMER_T * Removed include/timers.h and merged it into include/minix/timers.h * Resolved prototype conflict by renaming kernel's (re)set_timer to (re)set_kernel_timer. Change-Id: I56f0f30dfed96e1a0575d92492294cf9a06468a5
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
#include "sysutil.h"
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#include <minix/timers.h>
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/*===========================================================================*
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* tickdelay *
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*===========================================================================*/
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int tickdelay(clock_t ticks)
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{
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/* This function uses the synchronous alarm to delay for a while. This works
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* even if a previous synchronous alarm was scheduled, because the remaining
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* tick of the previous alarm are returned so that it can be rescheduled.
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* Note however that a long tick_delay (longer than the remaining time of the
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* previous) alarm will also delay the previous alarm.
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*/
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message m, m_alarm;
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int s;
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if (ticks <= 0) return OK; /* check for robustness */
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m.ALRM_EXP_TIME = ticks; /* request message after ticks */
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m.ALRM_ABS_TIME = 0; /* ticks are relative to now */
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s = _kernel_call(SYS_SETALARM, &m);
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if (s != OK) return(s);
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sef_receive(CLOCK,&m_alarm); /* await synchronous alarm */
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/* Check if we must reschedule the current alarm. */
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if (m.ALRM_TIME_LEFT > 0 && m.ALRM_TIME_LEFT != TMR_NEVER) {
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m.ALRM_EXP_TIME = m.ALRM_TIME_LEFT - ticks;
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if (m.ALRM_EXP_TIME <= 0)
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m.ALRM_EXP_TIME = 1;
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s = _kernel_call(SYS_SETALARM, &m);
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}
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return(s);
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}
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