diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asterisk/lock.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/asterisk/lock.h b/include/asterisk/lock.h index dc9cf9a28..67deba4dd 100644 --- a/include/asterisk/lock.h +++ b/include/asterisk/lock.h @@ -666,4 +666,31 @@ static inline int ast_cond_timedwait(ast_cond_t *cond, ast_mutex_t *t, const str #define pthread_create __use_ast_pthread_create_instead__ #endif +int ast_atomic_fetchadd_int_slow(volatile int *p, int v); + +#include "asterisk/inline_api.h" + +#if defined (__i386__) +AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), +{ + __asm __volatile ( + " lock xaddl %0, %1 ; " + : "+r" (v), /* 0 (result) */ + "=m" (*p) /* 1 */ + : "m" (*p)); /* 2 */ + return (v); +}) +#else /* low performance version in utils.c */ +AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), +{ + return ast_atomic_fetchadd_int_slow(p, v); +}) +#endif + +AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), +{ + int a = ast_atomic_fetchadd_int(p, -1); + return a == 1; /* true if the value is 0 now (so it was 1 previously) */ +}) + #endif /* _ASTERISK_LOCK_H */ |