src/libultra/os/settimer.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

#include "ultra64.h"

int osSetTimer(OSTimer* t, OSTime countdown, OSTime interval, OSMesgQueue* mq, OSMesg msg) {
    OSTime time;
    OSTimer* next;
    u32 count;
    u32 value;
    u32 saveMask;

    t->next = NULL;
    t->prev = NULL;
    t->interval = interval;
    if (countdown != 0) {
        t->value = countdown;
    } else {
        t->value = interval;
    }
    t->mq = mq;
    t->msg = msg;

    saveMask = __osDisableInt();

    if (__osTimerList->next == __osTimerList) {
    } else {
        next = __osTimerList->next;
        count = osGetCount();
        value = count - __osTimerCounter;
        if (value < next->value) {
            next->value -= value;
        } else {
            next->value = 1;
        }
    }

    time = __osInsertTimer(t);
    __osSetTimerIntr(__osTimerList->next->value);

    __osRestoreInt(saveMask);

    return 0;
}