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spa: add atomic.h and port macros to it

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This commit is contained in:
Wim Taymans 2023-07-13 12:25:22 +02:00
parent e86a770349
commit 0501ef165a
9 changed files with 76 additions and 66 deletions
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5
spa/include/spa/graph/graph.h
View file

@ -18,6 +18,7 @@ extern "C" {
* \{
*/
#include <spa/utils/atomic.h>
#include <spa/utils/defs.h>
#include <spa/utils/list.h>
#include <spa/utils/hook.h>
@ -53,7 +54,7 @@ struct spa_graph_link {
#define spa_graph_link_signal(l) ((l)->signal((l)->signal_data))
#define spa_graph_state_dec(s,c) (__atomic_sub_fetch(&(s)->pending, c, __ATOMIC_SEQ_CST) == 0)
#define spa_graph_state_dec(s) (SPA_ATOMIC_DEC(s->pending) == 0)
static inline int spa_graph_link_trigger(struct spa_graph_link *link)
{
@ -62,7 +63,7 @@ static inline int spa_graph_link_trigger(struct spa_graph_link *link)
spa_debug("link %p: state %p: pending %d/%d", link, state,
state->pending, state->required);
if (spa_graph_state_dec(state, 1))
if (spa_graph_state_dec(state))
spa_graph_link_signal(link);
return state->status;

35
spa/include/spa/utils/atomic.h Normal file
View file

@ -0,0 +1,35 @@
/* Atomic operations */
/* SPDX-FileCopyrightText: Copyright © 2023 Wim Taymans */
/* SPDX-License-Identifier: MIT */
#ifndef SPA_ATOMIC_H
#define SPA_ATOMIC_H
#ifdef __cplusplus
extern "C" {
#endif
#define SPA_ATOMIC_CAS(v,ov,nv) \
({ \
__typeof__(v) __ov = (ov); \
__atomic_compare_exchange_n(&(v), &__ov, (nv), \
0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \
})
#define SPA_ATOMIC_DEC(s) __atomic_sub_fetch(&(s), 1, __ATOMIC_SEQ_CST)
#define SPA_ATOMIC_INC(s) __atomic_add_fetch(&(s), 1, __ATOMIC_SEQ_CST)
#define SPA_ATOMIC_LOAD(s) __atomic_load_n(&(s), __ATOMIC_SEQ_CST)
#define SPA_ATOMIC_STORE(s,v) __atomic_store_n(&(s), (v), __ATOMIC_SEQ_CST)
#define SPA_ATOMIC_XCHG(s,v) __atomic_exchange_n(&(s), (v), __ATOMIC_SEQ_CST)
#define SPA_SEQ_WRITE(s) SPA_ATOMIC_INC(s)
#define SPA_SEQ_WRITE_SUCCESS(s1,s2) ((s1) + 1 == (s2) && ((s2) & 1) == 0)
#define SPA_SEQ_READ(s) SPA_ATOMIC_LOAD(s)
#define SPA_SEQ_READ_SUCCESS(s1,s2) ((s1) == (s2) && ((s2) & 1) == 0)
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SPA_ATOMIC_H */