user_atomic.h File Reference

#include <stdio.h>
#include <sys/types.h>

Go to the source code of this file.

Macros
#define	atomic_add_int(P, V)   (void) __sync_fetch_and_add(P, V)
#define	atomic_subtract_int(P, V)   (void) __sync_fetch_and_sub(P, V)
#define	atomic_fetchadd_int(p, v)   __sync_fetch_and_add(p, v)
#define	atomic_cmpset_int(dst, exp, src)   __sync_bool_compare_and_swap(dst, exp, src)
#define	SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr)   (atomic_fetchadd_int(addr, -1) == 1)
#define	SCTP_SAVE_ATOMIC_DECREMENT(addr, val)

Macro Definition Documentation

atomic_add_int

#define atomic_add_int	(		P,
			V
	)		(void) __sync_fetch_and_add(P, V)

atomic_cmpset_int

#define atomic_cmpset_int	(		dst,
			exp,
			src
	)		__sync_bool_compare_and_swap(dst, exp, src)

atomic_fetchadd_int

#define atomic_fetchadd_int	(		p,
			v
	)		__sync_fetch_and_add(p, v)

atomic_subtract_int

#define atomic_subtract_int	(		P,
			V
	)		(void) __sync_fetch_and_sub(P, V)

SCTP_DECREMENT_AND_CHECK_REFCOUNT

#define SCTP_DECREMENT_AND_CHECK_REFCOUNT

(

addr

)

(atomic_fetchadd_int(addr, -1) == 1)

SCTP_SAVE_ATOMIC_DECREMENT

#define SCTP_SAVE_ATOMIC_DECREMENT	(		addr,
			val
	)

Value:

{ \
    int32_t oldval; \
    oldval = atomic_fetchadd_int(addr, -val); \
    if (oldval < val) { \
        *addr = 0; \
    } \
}