mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-01 16:52:41 +00:00
b4b108de4d
Build breaks when enabling CONFIG_NEWLIB_LIBC because it has its own sched.h file. This is a bad symptom of a greater issue: the build system passes many '-I<path>' options to the compiler, and that allows including header files by simply specifying their names (when located somewhere else than <zephyr>/include/) and can cause clashes when several files in different locations have the same name, like in this case. Fixes ZEP-1062. Change-Id: I81d1d69ee6669a609cd0c420b1b8f870d17dcb67 Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
/*
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* Copyright (c) 2010-2016 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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*
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* @brief dynamic-size FIFO queue object.
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*/
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#include <kernel.h>
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#include <nano_private.h>
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#include <misc/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 <misc/slist.h>
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void k_fifo_init(struct k_fifo *fifo)
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{
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sys_slist_init(&fifo->data_q);
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sys_dlist_init(&fifo->wait_q);
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SYS_TRACING_OBJ_INIT(k_fifo, fifo);
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}
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static void prepare_thread_to_run(struct k_thread *thread, void *data)
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{
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_abort_thread_timeout(thread);
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_ready_thread(thread);
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_set_thread_return_value_with_data(thread, 0, data);
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}
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void k_fifo_put(struct k_fifo *fifo, 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(&fifo->wait_q);
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if (first_pending_thread) {
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prepare_thread_to_run(first_pending_thread, 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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sys_slist_append(&fifo->data_q, data);
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}
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irq_unlock(key);
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}
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void k_fifo_put_list(struct k_fifo *fifo, void *head, void *tail)
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{
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__ASSERT(head && tail, "invalid head or tail");
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struct k_thread *first_thread, *thread;
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unsigned int key;
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key = irq_lock();
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first_thread = _peek_first_pending_thread(&fifo->wait_q);
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while (head && ((thread = _unpend_first_thread(&fifo->wait_q)))) {
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prepare_thread_to_run(thread, head);
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head = *(void **)head;
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}
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if (head) {
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sys_slist_append_list(&fifo->data_q, head, tail);
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}
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if (first_thread) {
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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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}
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irq_unlock(key);
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}
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void k_fifo_put_slist(struct k_fifo *fifo, sys_slist_t *list)
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{
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__ASSERT(!sys_slist_is_empty(list), "list must not be empty");
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/*
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* note: this works as long as:
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* - the slist implementation keeps the next pointer as the first
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* field of the node object type
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* - list->tail->next = NULL.
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*/
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return k_fifo_put_list(fifo, list->head, list->tail);
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}
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void *k_fifo_get(struct k_fifo *fifo, 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(!sys_slist_is_empty(&fifo->data_q))) {
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data = sys_slist_get_not_empty(&fifo->data_q);
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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(&fifo->wait_q, timeout);
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return _Swap(key) ? NULL : _current->swap_data;
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}
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