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#ifndef foopulseatomichfoo
#define foopulseatomichfoo
/* $Id$ */
/***
This file is part of PulseAudio.
Copyright 2006 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <atomic_ops.h>
/* atomic_ops guarantees us that sizeof(AO_t) == sizeof(void*).
*
* It is not guaranteed however, that sizeof(AO_t) == sizeof(size_t).
* however very likely. */
typedef struct pa_atomic_int {
volatile AO_t value;
} pa_atomic_int_t;
#define PA_ATOMIC_INIT(v) { .value = (v) }
/* For now we do only full memory barriers. Eventually we might want
* to support more elaborate memory barriers, in which case we will add
* suffixes to the function names */
static inline int pa_atomic_load(const pa_atomic_int_t *a) {
return (int) AO_load_full((AO_t*) &a->value);
}
static inline void pa_atomic_store(pa_atomic_int_t *a, int i) {
AO_store_full(&a->value, (AO_t) i);
}
static inline int pa_atomic_add(pa_atomic_int_t *a, int i) {
return AO_fetch_and_add_full(&a->value, (AO_t) i);
}
static inline int pa_atomic_inc(pa_atomic_int_t *a) {
return AO_fetch_and_add1_full(&a->value);
}
static inline int pa_atomic_dec(pa_atomic_int_t *a) {
return AO_fetch_and_sub1_full(&a->value);
}
static inline int pa_atomic_cmpxchg(pa_atomic_int_t *a, int old_i, int new_i) {
return AO_compare_and_swap_full(&a->value, old_i, new_i);
}
typedef struct pa_atomic_ptr {
volatile AO_t value;
} pa_atomic_ptr_t;
static inline void* pa_atomic_ptr_load(const pa_atomic_ptr_t *a) {
return (void*) AO_load_full((AO_t*) &a->value);
}
static inline void pa_atomic_ptr_store(pa_atomic_ptr_t *a, void *p) {
AO_store_full(&a->value, (AO_t) p);
}
static inline int pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) {
return AO_compare_and_swap_full(&a->value, (AO_t) old_p, (AO_t) new_p);
}
#endif
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