+2003-03-20 Ulrich Drepper <drepper@redhat.com>
+
+ * sysdeps/unix/sysv/linux/ia64/lowlevellock.h: Include <atomic.h>.
+ Remove __lll_add, __lll_dev_if_positive, and __lll_test_and_set
+ definitions. Replace uses with calls to atomic_* functions.
+ * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: Likewise.
+ * sysdeps/unix/sysv/linux/lowlevellock.c: Replace __lll_add and
+ __lll_test_and_set calls with atomic_exchange_and_add and
+ atomic_exchange calls respectively.
+ * sysdeps/unix/sysv/linux/sem_post.c: Likewise.
+ * sysdeps/unix/sysv/linux/sem_timedwait.c: Likewise.
+ * sysdeps/unix/sysv/linux/sem_trywait.c: Likewise.
+ * sysdeps/unix/sysv/linux/sem_wait.c: Likewise.
+ * sysdeps/unix/sysv/linux/ia64/pthread_once.c: Likewise.
+ * sysdeps/unix/sysv/linux/ia64/sem_port.c: Likewise.
+ * sysdeps/unix/sysv/linux/powerpc/pthread_once.c: Likewise.
+
+ * allocatestack.c (allocate_stack): Assume atomic_exchange_and_add
+ returns the old value.
+
2003-03-20 Martin Schwidefsky <sky@mschwid3.boeblingen.de.ibm.com>
* sysdeps/s390/pthread_spin_lock.c (pthread_spin_lock): Use type
#include <sys/param.h>
#include <bits/pthreadtypes.h>
#include <ia64intrin.h>
+#include <atomic.h>
#define SYS_futex 1230
#define FUTEX_WAIT 0
#define __lll_compare_and_swap(futex, oldval, newval) \
__sync_val_compare_and_swap_si ((futex), (oldval), (newval))
-/* Add inc to *futex atomically and return the old value. */
-#define __lll_add(futex, inc) \
- ({ \
- int __val, __oldval; \
- int *__futex = (futex); \
- int __inc = inc; \
- \
- __val = *__futex; \
- do \
- { \
- __oldval = __val; \
- __val = __lll_compare_and_swap (__futex, __oldval, __oldval + __inc); \
- } \
- while (__builtin_expect (__val != __oldval, 0)); \
- __val; \
- })
-
-/* Decrement *futex if it is > 0, and return the old value. */
-#define __lll_dec_if_positive(futex) \
- ({ \
- int __val, __oldval; \
- int *__futex = (futex); \
- \
- __val = *__futex; \
- do \
- { \
- if (__builtin_expect (__val <= 0, 0)) \
- break; \
- __oldval = __val; \
- __val = __lll_compare_and_swap (__futex, __oldval, __oldval - 1); \
- } \
- while (__builtin_expect (__val != __oldval, 0)); \
- __val; \
- })
-
-/* Atomically store newval and return the old value. */
-#define __lll_test_and_set(futex, newval) \
- __sync_lock_test_and_set_si ((futex), (newval))
-
static inline int
__attribute__ ((always_inline))
__lll_mutex_trylock (int *futex)
__attribute__ ((always_inline))
__lll_mutex_unlock (int *futex)
{
- int val = __lll_test_and_set (futex, 0);
+ int val = atomic_exchange (futex, 0);
if (__builtin_expect (val > 1, 0))
lll_futex_wake (futex, 1);
#include <time.h>
#include <sys/param.h>
#include <bits/pthreadtypes.h>
+#include <atomic.h>
+
#define __NR_futex 221
#define FUTEX_WAIT 0
__val; \
})
-#define lll_mutex_trylock(lock) __lll_trylock(&(lock))
-
-/* Add inc to *futex atomically and return the old value. */
-#define __lll_add(futex, inc) \
- ({ int __val, __tmp; \
- __asm __volatile ("1: lwarx %0,0,%3\n" \
- " addi %1,%0,%4\n" \
- " stwcx. %1,0,%3\n" \
- " bne- 1b" \
- : "=&b" (__val), "=&r" (__tmp), "=m" (*futex) \
- : "r" (futex), "I" (inc), "2" (*futex) \
- : "cr0"); \
- __val; \
- })
-
-/* Atomically store newval and return the old value. */
-#define __lll_test_and_set(futex, newval) \
- ({ int __val; \
- __asm __volatile (__lll_rel_instr "\n" \
- "1: lwarx %0,0,%2\n" \
- " stwcx. %3,0,%2\n" \
- " bne- 1b" \
- : "=&r" (__val), "=m" (*futex) \
- : "r" (futex), "r" (newval), "1" (*futex) \
- : "cr0", "memory"); \
- __val; })
+#define lll_mutex_trylock(lock) __lll_trylock (&(lock))
extern void __lll_lock_wait (int *futex, int val) attribute_hidden;
#define lll_mutex_lock(lock) \
(void) ({ \
int *__futex = &(lock); \
- int __val = __lll_add (__futex, 1); \
+ int __val = atomic_exchange_and_add (__futex, 1); \
__asm __volatile (__lll_acq_instr ::: "memory"); \
if (__builtin_expect (__val != 0, 0)) \
__lll_lock_wait (__futex, __val); \
#define lll_mutex_timedlock(lock, abstime) \
({ int *__futex = &(lock); \
- int __val = __lll_add (__futex, 1); \
+ int __val = atomic_exchange_and_add (__futex, 1); \
__asm __volatile (__lll_acq_instr ::: "memory"); \
if (__builtin_expect (__val != 0, 0)) \
__val = __lll_timedlock_wait (__futex, __val, (abstime)); \
#define lll_mutex_unlock(lock) \
((void) ({ \
int *__futex = &(lock); \
- int __val = __lll_test_and_set (__futex, 0); \
+ int __val = atomic_exchange (__futex, 0); \
if (__builtin_expect (__val > 1, 0)) \
lll_futex_wake (__futex, 1); \
}))
})
-/* Decrement *futex if it is > 0, and return the old value */
-#define __lll_dec_if_positive(futex) \
- ({ int __val, __tmp; \
- __asm __volatile ("1: lwarx %0,0,%3\n" \
- " cmpwi 0,%0,0\n" \
- " addi %1,%0,-1\n" \
- " ble 2f\n" \
- " stwcx. %1,0,%3\n" \
- " bne- 1b\n" \
- "2: " __lll_acq_instr \
- : "=&b" (__val), "=&r" (__tmp), "=m" (*futex) \
- : "r" (futex), "2" (*futex) \
- : "cr0"); \
- __val; \
- })
-
-
/* Conditional variable handling. */
extern void __lll_cond_wait (pthread_cond_t *cond)
projects / platform / upstream / glibc.git / commitdiff