diff options
Diffstat (limited to 'include/atomic/rwlock.h')
| -rw-r--r-- | include/atomic/rwlock.h | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/include/atomic/rwlock.h b/include/atomic/rwlock.h index 12d0dd3f069..3d8edb9e27e 100644 --- a/include/atomic/rwlock.h +++ b/include/atomic/rwlock.h @@ -14,7 +14,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -typedef struct {pthread_rwlock_t rw;} my_atomic_rwlock_t; +typedef struct {pthread_mutex_t rw;} my_atomic_rwlock_t; #ifdef MY_ATOMIC_MODE_DUMMY /* @@ -32,13 +32,18 @@ typedef struct {pthread_rwlock_t rw;} my_atomic_rwlock_t; #define my_atomic_rwlock_wrunlock(name) #define MY_ATOMIC_MODE "dummy (non-atomic)" #else -#define my_atomic_rwlock_destroy(name) pthread_rwlock_destroy(& (name)->rw) -#define my_atomic_rwlock_init(name) pthread_rwlock_init(& (name)->rw, 0) -#define my_atomic_rwlock_rdlock(name) pthread_rwlock_rdlock(& (name)->rw) -#define my_atomic_rwlock_wrlock(name) pthread_rwlock_wrlock(& (name)->rw) -#define my_atomic_rwlock_rdunlock(name) pthread_rwlock_unlock(& (name)->rw) -#define my_atomic_rwlock_wrunlock(name) pthread_rwlock_unlock(& (name)->rw) -#define MY_ATOMIC_MODE "rwlocks" +/* + we're using read-write lock macros but map them to mutex locks, and they're + faster. Still, having semantically rich API we can change the + underlying implementation, if necessary. +*/ +#define my_atomic_rwlock_destroy(name) pthread_mutex_destroy(& (name)->rw) +#define my_atomic_rwlock_init(name) pthread_mutex_init(& (name)->rw, 0) +#define my_atomic_rwlock_rdlock(name) pthread_mutex_lock(& (name)->rw) +#define my_atomic_rwlock_wrlock(name) pthread_mutex_lock(& (name)->rw) +#define my_atomic_rwlock_rdunlock(name) pthread_mutex_unlock(& (name)->rw) +#define my_atomic_rwlock_wrunlock(name) pthread_mutex_unlock(& (name)->rw) +#define MY_ATOMIC_MODE "mutex" #endif #define make_atomic_add_body(S) int ## S sav; sav= *a; *a+= v; v=sav; |