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