153 lines
3.2 KiB
C
153 lines
3.2 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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* Copyright (c) 2016 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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*
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* Workqueue support functions
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*/
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#include <kernel_structs.h>
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#include <wait_q.h>
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#include <spinlock.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <sys/check.h>
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#define WORKQUEUE_THREAD_NAME "workqueue"
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#ifdef CONFIG_SYS_CLOCK_EXISTS
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static struct k_spinlock lock;
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#endif
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extern void z_work_q_main(void *work_q_ptr, void *p2, void *p3);
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void k_work_q_start(struct k_work_q *work_q, k_thread_stack_t *stack,
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size_t stack_size, int prio)
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{
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k_queue_init(&work_q->queue);
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(void)k_thread_create(&work_q->thread, stack, stack_size, z_work_q_main,
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work_q, NULL, NULL, prio, 0, K_NO_WAIT);
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k_thread_name_set(&work_q->thread, WORKQUEUE_THREAD_NAME);
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}
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#ifdef CONFIG_SYS_CLOCK_EXISTS
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static void work_timeout(struct _timeout *t)
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{
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struct k_delayed_work *w = CONTAINER_OF(t, struct k_delayed_work,
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timeout);
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/* submit work to workqueue */
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k_work_submit_to_queue(w->work_q, &w->work);
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}
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void k_delayed_work_init(struct k_delayed_work *work, k_work_handler_t handler)
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{
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k_work_init(&work->work, handler);
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z_init_timeout(&work->timeout);
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work->work_q = NULL;
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}
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static int work_cancel(struct k_delayed_work *work)
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{
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CHECKIF(work->work_q == NULL) {
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return -EALREADY;
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}
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if (k_work_pending(&work->work)) {
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/* Remove from the queue if already submitted */
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if (!k_queue_remove(&work->work_q->queue, &work->work)) {
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return -EINVAL;
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}
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} else {
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int err = z_abort_timeout(&work->timeout);
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if (err) {
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return -EALREADY;
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}
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}
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/* Detach from workqueue */
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work->work_q = NULL;
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atomic_clear_bit(work->work.flags, K_WORK_STATE_PENDING);
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return 0;
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}
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int k_delayed_work_submit_to_queue(struct k_work_q *work_q,
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struct k_delayed_work *work,
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k_timeout_t delay)
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{
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k_spinlock_key_t key = k_spin_lock(&lock);
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int err = 0;
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/* Work cannot be active in multiple queues */
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if (work->work_q != NULL && work->work_q != work_q) {
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err = -EADDRINUSE;
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goto done;
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}
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/* Cancel if work has been submitted */
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if (work->work_q == work_q) {
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err = work_cancel(work);
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/* -EALREADY indicates the work has already completed so this
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* is likely a recurring work.
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*/
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if (err == -EALREADY) {
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err = 0;
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} else if (err < 0) {
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goto done;
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}
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}
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/* Attach workqueue so the timeout callback can submit it */
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work->work_q = work_q;
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/* Submit work directly if no delay. Note that this is a
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* blocking operation, so release the lock first.
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*/
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if (K_TIMEOUT_EQ(delay, K_NO_WAIT)) {
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k_spin_unlock(&lock, key);
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k_work_submit_to_queue(work_q, &work->work);
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return 0;
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}
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#ifdef CONFIG_LEGACY_TIMEOUT_API
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delay = _TICK_ALIGN + k_ms_to_ticks_ceil32(delay);
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#endif
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/* Add timeout */
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z_add_timeout(&work->timeout, work_timeout, delay);
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done:
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k_spin_unlock(&lock, key);
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return err;
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}
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int k_delayed_work_cancel(struct k_delayed_work *work)
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{
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if (!work->work_q) {
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return -EINVAL;
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}
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k_spinlock_key_t key = k_spin_lock(&lock);
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int ret = work_cancel(work);
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k_spin_unlock(&lock, key);
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return ret;
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}
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bool k_delayed_work_pending(struct k_delayed_work *work)
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{
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return !z_is_inactive_timeout(&work->timeout) ||
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k_work_pending(&work->work);
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}
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#endif /* CONFIG_SYS_CLOCK_EXISTS */
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