void
interrupt_handler20(int* esp)
{
timer_t* timer;
char ts = 0;
io_out8(PIC0_OCW2, 0x60); /* send sign to PIC from IRQ-00 */
++g_timerctl.count;
if (g_timerctl.next > g_timerctl.count)
return; /* not the next timeout timer, break */
timer = g_timerctl.timer0;
for ( ; ; ) {
/* timers are all using, donot need to check flags */
if (timer->timeout > g_timerctl.count)
break;
/* timeout */
timer->flags = TIMER_FLAGS_ALLOC;
if (timer != g_mttimer)
fifo_put(timer->fifo, timer->data);
else
ts = 1; /* g_mttimer timeout */
timer = timer->next;
}
g_timerctl.timer0 = timer;
g_timerctl.next = timer->timeout;
/* task switch */
if (0 != ts)
mt_taskswitch();
}
void inthandler20(int *esp)
{
struct TIMER *timer;
char ts = 0;
io_out8(PIC0_OCW2, 0x60);
timerctl.count++;
if (timerctl.next > timerctl.count) {
return;
}
timer = timerctl.t0;
for (;;) {
if (timer->timeout > timerctl.count) {
break;
}
timer->flags = TIMER_FLAGS_ALLOC;
if (timer != mt_timer) {
fifo32_put(timer->fifo, timer->data);
} else {
ts = 1;
}
timer = timer->next;
}
timerctl.t0 = timer;
timerctl.next = timer->timeout;
if (ts != 0) {
mt_taskswitch();
}
return;
}
void inthandler20(int *esp)
{
struct TIMER *timer;
char ts = 0;
io_out8(PIC0_OCW2, 0x60); /* 把IRQ-00接收信号结束的信息通知给PIC */
timerctl.count++;
if (timerctl.next > timerctl.count) {
return;
}
timer = timerctl.t0; /* 首先把最前面的地址赋给timer */
for (;;) {
/* 因为timers的定时器都处于运行状态，所以不确认flags */
if (timer->timeout > timerctl.count) {
break;
}
/* 超时 */
timer->flags = TIMER_FLAGS_ALLOC;
if (timer != mt_timer) {
fifo32_put(timer->fifo, timer->data);
} else {
ts = 1; /* mt_timer超时*/
}
timer = timer->next; /* 将下一个定时器的地址赋给timer*/
}
timerctl.t0 = timer;
timerctl.next = timer->timeout;
if (ts != 0) {
mt_taskswitch();
}
return;
}
