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Part of fs timers library, forgot to add this in previous commit.

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Ben Gras 2005-06-17 13:49:56 +00:00
parent 3ba1ddb037
commit 5954c7e303
1 changed files with 75 additions and 0 deletions
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servers/fs/timers.c Normal file
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/* FS timers library
*/
#include "fs.h"
#include "fs_timers.h"
#define VERBOSE 1
#include <timers.h>
#include <minix/syslib.h>
#include <minix/com.h>
PRIVATE timer_t *fs_timers = NULL;
PUBLIC void fs_set_timer(timer_t *tp, int ticks, tmr_func_t watchdog, int arg)
{
int r;
clock_t now, old_head = 0, new_head;
if((r = sys_getuptime(&now)) != OK)
panic(__FILE__, "FS couldn't get uptime from system task.", NO_NUM);
tmr_inittimer(tp);
tmr_arg(tp)->ta_int = arg;
old_head = tmrs_settimer(&fs_timers, tp, now+ticks, watchdog, &new_head);
/* reschedule our synchronous alarm if necessary */
if(!old_head || old_head > new_head) {
if(sys_syncalrm(SELF, new_head, 1) != OK)
panic(__FILE__, "FS set timer couldn't set synchronous alarm.", NO_NUM);
#if VERBOSE
else
printf("timers: after setting, set synalarm to %d -> %d\n", old_head, new_head);
#endif
}
return;
}
PUBLIC void fs_expire_timers(clock_t now)
{
clock_t new_head;
tmrs_exptimers(&fs_timers, now, &new_head);
if(new_head > 0) {
if(sys_syncalrm(SELF, new_head, 1) != OK)
panic(__FILE__, "FS expire timer couldn't set synchronous alarm.", NO_NUM);
else
#if VERBOSE
printf("timers: after expiry, set synalarm to %d\n", new_head);
#endif
}
#if VERBOSE
else printf("after expiry, no new timer set\n");
#endif
}
PUBLIC void fs_cancel_timer(timer_t *tp)
{
clock_t new_head, old_head;
old_head = tmrs_clrtimer(&fs_timers, tp, &new_head);
/* if the earliest timer has been removed, we have to set
* the synalarm to the next timer, or cancel the synalarm
* altogether if th last time has been cancelled (new_head
* will be 0 then).
*/
if(old_head < new_head || !new_head) {
if(sys_syncalrm(SELF, new_head, 1) != OK)
panic(__FILE__, "FS expire timer couldn't set synchronous alarm.", NO_NUM);
#if VERBOSE
printf("timers: after cancelling, set synalarm to %d -> %d\n", old_head, new_head);
#endif
}
}