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Fix a race with the xadd functions.

This commit is contained in:
ad 2008-06-22 09:42:56 +00:00
parent 768e748678
commit 998b5a2fd0
1 changed files with 5 additions and 7 deletions
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12
usr.sbin/bind/include/isc/atomic.h
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@ -1,4 +1,4 @@
/* $NetBSD: atomic.h,v 1.7 2008/06/22 00:14:06 christos Exp $ */
/* $NetBSD: atomic.h,v 1.8 2008/06/22 09:42:56 ad Exp $ */
#ifndef ISC_ATOMIC_H
#define ISC_ATOMIC_H 1
@ -12,17 +12,15 @@
*/
static __inline isc_int32_t
isc_atomic_xadd(isc_int32_t *p, isc_int32_t val) {
isc_int32_t prev = val;
atomic_add_32((volatile uint32_t *)p, (uint32_t)val);
return prev;
return (isc_int32_t)atomic_add_32_nv((volatile uint32_t *)p,
(uint32_t)val) - val;
}
#ifdef ISC_PLATFORM_HAVEXADDQ
static __inline isc_int64_t
isc_atomic_xaddq(isc_int64_t *p, isc_int64_t val) {
isc_int64_t prev = val;
atomic_add_64((volatile uint64_t *)p, (uint64_t)val);
return prev;
return (isc_int64_t)atomic_add_64((volatile uint64_t *)p,
(uint64_t)val) - val;
}
#endif