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