1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2019 Intel Corporation
5 #ifndef _RTE_STACK_LF_H_
6 #define _RTE_STACK_LF_H_
8 #include "rte_stack_lf_generic.h"
11 * @internal Push several objects on the lock-free stack (MT-safe).
14 * A pointer to the stack structure.
16 * A pointer to a table of void * pointers (objects).
18 * The number of objects to push on the stack from the obj_table.
20 * Actual number of objects enqueued.
22 static __rte_always_inline unsigned int __rte_experimental
23 __rte_stack_lf_push(struct rte_stack *s,
24 void * const *obj_table,
27 struct rte_stack_lf_elem *tmp, *first, *last = NULL;
33 /* Pop n free elements */
34 first = __rte_stack_lf_pop_elems(&s->stack_lf.free, n, NULL, &last);
35 if (unlikely(first == NULL))
38 /* Construct the list elements */
39 for (tmp = first, i = 0; i < n; i++, tmp = tmp->next)
40 tmp->data = obj_table[n - i - 1];
42 /* Push them to the used list */
43 __rte_stack_lf_push_elems(&s->stack_lf.used, first, last, n);
49 * @internal Pop several objects from the lock-free stack (MT-safe).
52 * A pointer to the stack structure.
54 * A pointer to a table of void * pointers (objects).
56 * The number of objects to pull from the stack.
58 * - Actual number of objects popped.
60 static __rte_always_inline unsigned int __rte_experimental
61 __rte_stack_lf_pop(struct rte_stack *s, void **obj_table, unsigned int n)
63 struct rte_stack_lf_elem *first, *last = NULL;
68 /* Pop n used elements */
69 first = __rte_stack_lf_pop_elems(&s->stack_lf.used,
71 if (unlikely(first == NULL))
74 /* Push the list elements to the free list */
75 __rte_stack_lf_push_elems(&s->stack_lf.free, first, last, n);
81 * @internal Initialize a lock-free stack.
84 * A pointer to the stack structure.
86 * The size of the stack.
89 rte_stack_lf_init(struct rte_stack *s, unsigned int count);
92 * @internal Return the memory required for a lock-free stack.
95 * The size of the stack.
97 * The bytes to allocate for a lock-free stack.
100 rte_stack_lf_get_memsize(unsigned int count);
102 #endif /* _RTE_STACK_LF_H_ */