1 #ifndef foopulseatomichfoo
2 #define foopulseatomichfoo
7 This file is part of PulseAudio.
9 Copyright 2006 Lennart Poettering
11 PulseAudio is free software; you can redistribute it and/or modify
12 it under the terms of the GNU Lesser General Public License as
13 published by the Free Software Foundation; either version 2 of the
14 License, or (at your option) any later version.
16 PulseAudio is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public
22 License along with PulseAudio; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #include <atomic_ops.h>
29 /* atomic_ops guarantees us that sizeof(AO_t) == sizeof(void*).
31 * It is not guaranteed however, that sizeof(AO_t) == sizeof(size_t).
32 * however very likely. */
34 typedef struct pa_atomic_int {
38 #define PA_ATOMIC_INIT(v) { .value = (v) }
40 /* For now we do only full memory barriers. Eventually we might want
41 * to support more elaborate memory barriers, in which case we will add
42 * suffixes to the function names */
44 static inline int pa_atomic_load(const pa_atomic_int_t *a) {
45 return (int) AO_load_full((AO_t*) &a->value);
48 static inline void pa_atomic_store(pa_atomic_int_t *a, int i) {
49 AO_store_full(&a->value, (AO_t) i);
52 static inline int pa_atomic_add(pa_atomic_int_t *a, int i) {
53 return AO_fetch_and_add_full(&a->value, (AO_t) i);
56 static inline int pa_atomic_sub(pa_atomic_int_t *a, int i) {
57 return AO_fetch_and_add_full(&a->value, (AO_t) -i);
60 static inline int pa_atomic_inc(pa_atomic_int_t *a) {
61 return AO_fetch_and_add1_full(&a->value);
64 static inline int pa_atomic_dec(pa_atomic_int_t *a) {
65 return AO_fetch_and_sub1_full(&a->value);
68 static inline int pa_atomic_cmpxchg(pa_atomic_int_t *a, int old_i, int new_i) {
69 return AO_compare_and_swap_full(&a->value, old_i, new_i);
72 typedef struct pa_atomic_ptr {
76 static inline void* pa_atomic_ptr_load(const pa_atomic_ptr_t *a) {
77 return (void*) AO_load_full((AO_t*) &a->value);
80 static inline void pa_atomic_ptr_store(pa_atomic_ptr_t *a, void *p) {
81 AO_store_full(&a->value, (AO_t) p);
84 static inline int pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) {
85 return AO_compare_and_swap_full(&a->value, (AO_t) old_p, (AO_t) new_p);