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/* wait queue for multiple threads on kernel objects */
/*
* Copyright (c) 2015 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_KERNEL_INCLUDE_WAIT_Q_H_
#define ZEPHYR_KERNEL_INCLUDE_WAIT_Q_H_
#include <zephyr/kernel_structs.h>
#include <zephyr/sys/dlist.h>
#include <zephyr/sys/rb.h>
#include <zephyr/kernel/sched_priq.h>
#include <zephyr/timeout_q.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef CONFIG_WAITQ_SCALABLE
#define _WAIT_Q_FOR_EACH(wq, thread_ptr) \
RB_FOR_EACH_CONTAINER(&(wq)->waitq.tree, thread_ptr, base.qnode_rb)
static inline void z_waitq_init(_wait_q_t *w)
{
w->waitq = (struct _priq_rb) {
.tree = {
.lessthan_fn = z_priq_rb_lessthan
}
};
}
static inline struct k_thread *z_waitq_head(_wait_q_t *w)
{
return (struct k_thread *)rb_get_min(&w->waitq.tree);
}
#else /* !CONFIG_WAITQ_SCALABLE: */
#define _WAIT_Q_FOR_EACH(wq, thread_ptr) \
SYS_DLIST_FOR_EACH_CONTAINER(&((wq)->waitq), thread_ptr, \
base.qnode_dlist)
static inline void z_waitq_init(_wait_q_t *w)
{
sys_dlist_init(&w->waitq);
}
static inline struct k_thread *z_waitq_head(_wait_q_t *w)
{
return (struct k_thread *)sys_dlist_peek_head(&w->waitq);
}
#endif /* !CONFIG_WAITQ_SCALABLE */
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_KERNEL_INCLUDE_WAIT_Q_H_ */