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 #if !(defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_ARM64))
9 #include "rte_stack_lf_stubs.h"
11 #ifdef RTE_USE_C11_MEM_MODEL
12 #include "rte_stack_lf_c11.h"
14 #include "rte_stack_lf_generic.h"
19 * @internal Push several objects on the lock-free stack (MT-safe).
22 * A pointer to the stack structure.
24 * A pointer to a table of void * pointers (objects).
26 * The number of objects to push on the stack from the obj_table.
28 * Actual number of objects enqueued.
30 static __rte_always_inline unsigned int
31 __rte_stack_lf_push(struct rte_stack *s,
32 void * const *obj_table,
35 struct rte_stack_lf_elem *tmp, *first, *last = NULL;
41 /* Pop n free elements */
42 first = __rte_stack_lf_pop_elems(&s->stack_lf.free, n, NULL, &last);
43 if (unlikely(first == NULL))
46 /* Construct the list elements */
47 for (tmp = first, i = 0; i < n; i++, tmp = tmp->next)
48 tmp->data = obj_table[n - i - 1];
50 /* Push them to the used list */
51 __rte_stack_lf_push_elems(&s->stack_lf.used, first, last, n);
57 * @internal Pop several objects from the lock-free stack (MT-safe).
60 * A pointer to the stack structure.
62 * A pointer to a table of void * pointers (objects).
64 * The number of objects to pull from the stack.
66 * - Actual number of objects popped.
68 static __rte_always_inline unsigned int
69 __rte_stack_lf_pop(struct rte_stack *s, void **obj_table, unsigned int n)
71 struct rte_stack_lf_elem *first, *last = NULL;
76 /* Pop n used elements */
77 first = __rte_stack_lf_pop_elems(&s->stack_lf.used,
79 if (unlikely(first == NULL))
82 /* Push the list elements to the free list */
83 __rte_stack_lf_push_elems(&s->stack_lf.free, first, last, n);
89 * @internal Initialize a lock-free stack.
92 * A pointer to the stack structure.
94 * The size of the stack.
97 rte_stack_lf_init(struct rte_stack *s, unsigned int count);
100 * @internal Return the memory required for a lock-free stack.
103 * The size of the stack.
105 * The bytes to allocate for a lock-free stack.
108 rte_stack_lf_get_memsize(unsigned int count);
110 #endif /* _RTE_STACK_LF_H_ */