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/*
* Copyright (c) 2010-2015 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/** @file
*
* @brief dynamic-size LIFO queue object
*/
#include <kernel.h>
#include <kernel_structs.h>
#include <debug/object_tracing_common.h>
#include <toolchain.h>
#include <sections.h>
#include <wait_q.h>
#include <ksched.h>
#include <init.h>
extern struct k_lifo _k_lifo_list_start[];
extern struct k_lifo _k_lifo_list_end[];
struct k_lifo *_trace_list_k_lifo;
#ifdef CONFIG_OBJECT_TRACING
/*
* Complete initialization of statically defined lifos.
*/
static int init_lifo_module(struct device *dev)
{
ARG_UNUSED(dev);
struct k_lifo *lifo;
for (lifo = _k_lifo_list_start; lifo < _k_lifo_list_end; lifo++) {
SYS_TRACING_OBJ_INIT(k_lifo, lifo);
}
return 0;
}
SYS_INIT(init_lifo_module, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_OBJECTS);
#endif /* CONFIG_OBJECT_TRACING */
void k_lifo_init(struct k_lifo *lifo)
{
lifo->list = (void *)0;
sys_dlist_init(&lifo->wait_q);
SYS_TRACING_OBJ_INIT(k_lifo, lifo);
}
void k_lifo_put(struct k_lifo *lifo, void *data)
{
struct k_thread *first_pending_thread;
unsigned int key;
key = irq_lock();
first_pending_thread = _unpend_first_thread(&lifo->wait_q);
if (first_pending_thread) {
_abort_thread_timeout(first_pending_thread);
_ready_thread(first_pending_thread);
_set_thread_return_value_with_data(first_pending_thread,
0, data);
if (!_is_in_isr() && _must_switch_threads()) {
(void)_Swap(key);
return;
}
} else {
*(void **)data = lifo->list;
lifo->list = data;
}
irq_unlock(key);
}
void *k_lifo_get(struct k_lifo *lifo, int32_t timeout)
{
unsigned int key;
void *data;
key = irq_lock();
if (likely(lifo->list)) {
data = lifo->list;
lifo->list = *(void **)data;
irq_unlock(key);
return data;
}
if (timeout == K_NO_WAIT) {
irq_unlock(key);
return NULL;
}
_pend_current_thread(&lifo->wait_q, timeout);
return _Swap(key) ? NULL : _current->base.swap_data;
}
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