2  * Copyright (c) 2010-2016 Wind River Systems, Inc.
4  * SPDX-License-Identifier: Apache-2.0
8  * @brief fixed-size stack object
30 	z_waitq_init(&stack->wait_q);  in k_stack_init()
31 	stack->lock = (struct k_spinlock) {};  in k_stack_init()
32 	stack->next = buffer;  in k_stack_init()
33 	stack->base = buffer;  in k_stack_init()
34 	stack->top = stack->base + num_entries;  in k_stack_init()
54 		stack->flags = K_STACK_FLAG_ALLOC;  in z_impl_k_stack_alloc_init()
57 		ret = -ENOMEM;  in z_impl_k_stack_alloc_init()
84 	CHECKIF(z_waitq_head(&stack->wait_q) != NULL) {  in k_stack_cleanup()
85 		SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_stack, cleanup, stack, -EAGAIN);  in k_stack_cleanup()
87 		return -EAGAIN;  in k_stack_cleanup()
90 	if ((stack->flags & K_STACK_FLAG_ALLOC) != (uint8_t)0) {  in k_stack_cleanup()
91 		k_free(stack->base);  in k_stack_cleanup()
92 		stack->base = NULL;  in k_stack_cleanup()
93 		stack->flags &= ~K_STACK_FLAG_ALLOC;  in k_stack_cleanup()
105 	k_spinlock_key_t key = k_spin_lock(&stack->lock);  in z_impl_k_stack_push()
109 	CHECKIF(stack->next == stack->top) {  in z_impl_k_stack_push()
110 		ret = -ENOMEM;  in z_impl_k_stack_push()
114 	first_pending_thread = z_unpend_first_thread(&stack->wait_q);  in z_impl_k_stack_push()
121 		z_reschedule(&stack->lock, key);  in z_impl_k_stack_push()
124 		*(stack->next) = data;  in z_impl_k_stack_push()
125 		stack->next++;  in z_impl_k_stack_push()
130 	k_spin_unlock(&stack->lock, key);  in z_impl_k_stack_push()
154 	key = k_spin_lock(&stack->lock);  in z_impl_k_stack_pop()
158 	if (likely(stack->next > stack->base)) {  in z_impl_k_stack_pop()
159 		stack->next--;  in z_impl_k_stack_pop()
160 		*data = *(stack->next);  in z_impl_k_stack_pop()
161 		k_spin_unlock(&stack->lock, key);  in z_impl_k_stack_pop()
171 		k_spin_unlock(&stack->lock, key);  in z_impl_k_stack_pop()
173 		SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_stack, pop, stack, timeout, -EBUSY);  in z_impl_k_stack_pop()
175 		return -EBUSY;  in z_impl_k_stack_pop()
178 	result = z_pend_curr(&stack->lock, key, &stack->wait_q, timeout);  in z_impl_k_stack_pop()
179 	if (result == -EAGAIN) {  in z_impl_k_stack_pop()
180 		SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_stack, pop, stack, timeout, -EAGAIN);  in z_impl_k_stack_pop()
182 		return -EAGAIN;  in z_impl_k_stack_pop()
185 	*data = (stack_data_t)arch_current_thread()->base.swap_data;  in z_impl_k_stack_pop()