96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
/*
|
|
* Copyright (c) 2010-2016 Wind River Systems, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @brief fixed-size stack object
|
|
*/
|
|
|
|
#include <kernel.h>
|
|
#include <nano_private.h>
|
|
#include <misc/debug/object_tracing_common.h>
|
|
#include <toolchain.h>
|
|
#include <sections.h>
|
|
#include <ksched.h>
|
|
#include <wait_q.h>
|
|
#include <misc/__assert.h>
|
|
|
|
void k_stack_init(struct k_stack *stack, uint32_t *buffer, int num_entries)
|
|
{
|
|
sys_dlist_init(&stack->wait_q);
|
|
stack->next = stack->base = buffer;
|
|
stack->top = stack->base + num_entries;
|
|
|
|
SYS_TRACING_OBJ_INIT(k_stack, stack);
|
|
}
|
|
|
|
void k_stack_push(struct k_stack *stack, uint32_t data)
|
|
{
|
|
struct k_thread *first_pending_thread;
|
|
unsigned int key;
|
|
|
|
__ASSERT(stack->next != stack->top, "stack is full");
|
|
|
|
key = irq_lock();
|
|
|
|
first_pending_thread = _unpend_first_thread(&stack->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, (void *)data);
|
|
|
|
if (!_is_in_isr() && _must_switch_threads()) {
|
|
(void)_Swap(key);
|
|
return;
|
|
}
|
|
} else {
|
|
*(stack->next) = data;
|
|
stack->next++;
|
|
}
|
|
|
|
irq_unlock(key);
|
|
}
|
|
|
|
int k_stack_pop(struct k_stack *stack, uint32_t *data, int32_t timeout)
|
|
{
|
|
unsigned int key;
|
|
int result;
|
|
|
|
key = irq_lock();
|
|
|
|
if (likely(stack->next > stack->base)) {
|
|
stack->next--;
|
|
*data = *(stack->next);
|
|
irq_unlock(key);
|
|
return 0;
|
|
}
|
|
|
|
if (timeout == K_NO_WAIT) {
|
|
irq_unlock(key);
|
|
return -EBUSY;
|
|
}
|
|
|
|
_pend_current_thread(&stack->wait_q, timeout);
|
|
|
|
result = _Swap(key);
|
|
if (result == 0) {
|
|
*data = (uint32_t)_current->swap_data;
|
|
}
|
|
return result;
|
|
}
|