123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
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#include <defs.h>
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#include <list.h>
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#include <sync.h>
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#include <wait.h>
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#include <proc.h>
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void
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wait_init(wait_t *wait, struct proc_struct *proc) {
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wait->proc = proc;
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wait->wakeup_flags = WT_INTERRUPTED;
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list_init(&(wait->wait_link));
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}
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void
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wait_queue_init(wait_queue_t *queue) {
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list_init(&(queue->wait_head));
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}
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void
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wait_queue_add(wait_queue_t *queue, wait_t *wait) {
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assert(list_empty(&(wait->wait_link)) && wait->proc != NULL);
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wait->wait_queue = queue;
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list_add_before(&(queue->wait_head), &(wait->wait_link));
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}
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void
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wait_queue_del(wait_queue_t *queue, wait_t *wait) {
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assert(!list_empty(&(wait->wait_link)) && wait->wait_queue == queue);
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list_del_init(&(wait->wait_link));
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}
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wait_t *
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wait_queue_next(wait_queue_t *queue, wait_t *wait) {
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assert(!list_empty(&(wait->wait_link)) && wait->wait_queue == queue);
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list_entry_t *le = list_next(&(wait->wait_link));
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if (le != &(queue->wait_head)) {
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return le2wait(le, wait_link);
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}
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return NULL;
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}
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wait_t *
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wait_queue_prev(wait_queue_t *queue, wait_t *wait) {
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assert(!list_empty(&(wait->wait_link)) && wait->wait_queue == queue);
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list_entry_t *le = list_prev(&(wait->wait_link));
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if (le != &(queue->wait_head)) {
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return le2wait(le, wait_link);
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}
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return NULL;
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}
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wait_t *
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wait_queue_first(wait_queue_t *queue) {
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list_entry_t *le = list_next(&(queue->wait_head));
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if (le != &(queue->wait_head)) {
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return le2wait(le, wait_link);
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}
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return NULL;
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}
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wait_t *
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wait_queue_last(wait_queue_t *queue) {
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list_entry_t *le = list_prev(&(queue->wait_head));
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if (le != &(queue->wait_head)) {
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return le2wait(le, wait_link);
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}
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return NULL;
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}
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bool
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wait_queue_empty(wait_queue_t *queue) {
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return list_empty(&(queue->wait_head));
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}
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bool
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wait_in_queue(wait_t *wait) {
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return !list_empty(&(wait->wait_link));
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}
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void
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wakeup_wait(wait_queue_t *queue, wait_t *wait, uint32_t wakeup_flags, bool del) {
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if (del) {
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wait_queue_del(queue, wait);
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}
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wait->wakeup_flags = wakeup_flags;
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wakeup_proc(wait->proc);
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}
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void
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wakeup_first(wait_queue_t *queue, uint32_t wakeup_flags, bool del) {
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wait_t *wait;
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if ((wait = wait_queue_first(queue)) != NULL) {
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wakeup_wait(queue, wait, wakeup_flags, del);
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}
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}
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void
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wakeup_queue(wait_queue_t *queue, uint32_t wakeup_flags, bool del) {
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wait_t *wait;
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if ((wait = wait_queue_first(queue)) != NULL) {
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if (del) {
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do {
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wakeup_wait(queue, wait, wakeup_flags, 1);
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} while ((wait = wait_queue_first(queue)) != NULL);
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}
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else {
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do {
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wakeup_wait(queue, wait, wakeup_flags, 0);
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} while ((wait = wait_queue_next(queue, wait)) != NULL);
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}
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}
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}
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void
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wait_current_set(wait_queue_t *queue, wait_t *wait, uint32_t wait_state) {
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assert(current != NULL);
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wait_init(wait, current);
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current->state = PROC_SLEEPING;
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current->wait_state = wait_state;
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wait_queue_add(queue, wait);
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}
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