DPDK  19.05.0
rte_stack_std.h
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright(c) 2019 Intel Corporation
3  */
4 
5 #ifndef _RTE_STACK_STD_H_
6 #define _RTE_STACK_STD_H_
7 
9 
22 static __rte_always_inline unsigned int __rte_experimental
23 __rte_stack_std_push(struct rte_stack *s, void * const *obj_table,
24  unsigned int n)
25 {
26  struct rte_stack_std *stack = &s->stack_std;
27  unsigned int index;
28  void **cache_objs;
29 
30  rte_spinlock_lock(&stack->lock);
31  cache_objs = &stack->objs[stack->len];
32 
33  /* Is there sufficient space in the stack? */
34  if ((stack->len + n) > s->capacity) {
35  rte_spinlock_unlock(&stack->lock);
36  return 0;
37  }
38 
39  /* Add elements back into the cache */
40  for (index = 0; index < n; ++index, obj_table++)
41  cache_objs[index] = *obj_table;
42 
43  stack->len += n;
44 
45  rte_spinlock_unlock(&stack->lock);
46  return n;
47 }
48 
61 static __rte_always_inline unsigned int __rte_experimental
62 __rte_stack_std_pop(struct rte_stack *s, void **obj_table, unsigned int n)
63 {
64  struct rte_stack_std *stack = &s->stack_std;
65  unsigned int index, len;
66  void **cache_objs;
67 
68  rte_spinlock_lock(&stack->lock);
69 
70  if (unlikely(n > stack->len)) {
71  rte_spinlock_unlock(&stack->lock);
72  return 0;
73  }
74 
75  cache_objs = stack->objs;
76 
77  for (index = 0, len = stack->len - 1; index < n;
78  ++index, len--, obj_table++)
79  *obj_table = cache_objs[len];
80 
81  stack->len -= n;
82  rte_spinlock_unlock(&stack->lock);
83 
84  return n;
85 }
86 
95 static __rte_always_inline unsigned int __rte_experimental
96 __rte_stack_std_count(struct rte_stack *s)
97 {
98  return (unsigned int)s->stack_std.len;
99 }
100 
107 void
108 rte_stack_std_init(struct rte_stack *s);
109 
118 ssize_t
119 rte_stack_std_get_memsize(unsigned int count);
120 
121 #endif /* _RTE_STACK_STD_H_ */