2 * Copyright 2010-2015 Samy Al Bahra.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <ck_stddef.h>
36 #define CK_HP_STACK_SLOTS_COUNT 1
37 #define CK_HP_STACK_SLOTS_SIZE sizeof(void *)
39 CK_CC_INLINE static void
40 ck_hp_stack_push_mpmc(struct ck_stack *target, struct ck_stack_entry *entry)
43 ck_stack_push_upmc(target, entry);
47 CK_CC_INLINE static bool
48 ck_hp_stack_trypush_mpmc(struct ck_stack *target, struct ck_stack_entry *entry)
51 return ck_stack_trypush_upmc(target, entry);
54 CK_CC_INLINE static struct ck_stack_entry *
55 ck_hp_stack_pop_mpmc(ck_hp_record_t *record, struct ck_stack *target)
57 struct ck_stack_entry *entry, *update;
60 entry = ck_pr_load_ptr(&target->head);
64 ck_hp_set_fence(record, 0, entry);
65 } while (entry != ck_pr_load_ptr(&target->head));
67 while (ck_pr_cas_ptr_value(&target->head, entry, entry->next, &entry) == false) {
71 ck_hp_set_fence(record, 0, entry);
73 update = ck_pr_load_ptr(&target->head);
74 while (entry != update) {
75 ck_hp_set_fence(record, 0, update);
77 update = ck_pr_load_ptr(&target->head);
86 CK_CC_INLINE static bool
87 ck_hp_stack_trypop_mpmc(ck_hp_record_t *record, struct ck_stack *target, struct ck_stack_entry **r)
89 struct ck_stack_entry *entry;
91 entry = ck_pr_load_ptr(&target->head);
95 ck_hp_set_fence(record, 0, entry);
96 if (entry != ck_pr_load_ptr(&target->head))
99 if (ck_pr_cas_ptr_value(&target->head, entry, entry->next, &entry) == false)
106 ck_hp_set(record, 0, NULL);
110 #endif /* CK_HP_STACK_H */