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Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h')
-rw-r--r--nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h118
1 files changed, 19 insertions, 99 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
index 0136b97595..2bee000730 100644
--- a/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
@@ -13,7 +13,7 @@
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
+ License along with the GNU C Libr \ary; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
@@ -33,11 +33,6 @@
#define FUTEX_WAKE 1
#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
-#define FUTEX_WAKE_OP 5
-#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
-#define FUTEX_LOCK_PI 6
-#define FUTEX_UNLOCK_PI 7
-#define FUTEX_TRYLOCK_PI 8
/* Initializer for compatibility lock. */
#define LLL_MUTEX_LOCK_INITIALIZER (0)
@@ -72,17 +67,6 @@
INTERNAL_SYSCALL_ERROR_P (__ret, __err) ? -__ret : __ret; \
})
-#define lll_robust_mutex_dead(futexv) \
- do \
- { \
- INTERNAL_SYSCALL_DECL (__err); \
- int *__futexp = &(futexv); \
- \
- atomic_or (__futexp, FUTEX_OWNER_DIED); \
- INTERNAL_SYSCALL (futex, __err, 4, __futexp, FUTEX_WAKE, 1, 0); \
- } \
- while (0)
-
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val) \
({ \
@@ -95,43 +79,16 @@
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
})
-/* Returns non-zero if error happened, zero if success. */
-#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2) \
- ({ \
- INTERNAL_SYSCALL_DECL (__err); \
- long int __ret; \
- \
- __ret = INTERNAL_SYSCALL (futex, __err, 6, \
- (futexp), FUTEX_WAKE_OP, (nr_wake), \
- (nr_wake2), (futexp2), \
- FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \
- INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
- })
-
#ifdef UP
# define __lll_acq_instr ""
# define __lll_rel_instr ""
#else
# define __lll_acq_instr "isync"
-# ifdef _ARCH_PWR4
-/*
- * Newer powerpc64 processors support the new "light weight" sync (lwsync)
- * So if the build is using -mcpu=[power4,power5,power5+,970] we can
- * safely use lwsync.
- */
-# define __lll_rel_instr "lwsync"
-# else
-/*
- * Older powerpc32 processors don't support the new "light weight"
- * sync (lwsync). So the only safe option is to use normal sync
- * for all powerpc32 applications.
- */
-# define __lll_rel_instr "sync"
-# endif
+# define __lll_rel_instr "sync"
#endif
-/* Set *futex to ID if it is 0, atomically. Returns the old value */
-#define __lll_robust_trylock(futex, id) \
+/* Set *futex to 1 if it is 0, atomically. Returns the old value */
+#define __lll_trylock(futex) \
({ int __val; \
__asm __volatile ("1: lwarx %0,0,%2\n" \
" cmpwi 0,%0,0\n" \
@@ -140,26 +97,31 @@
" bne- 1b\n" \
"2: " __lll_acq_instr \
: "=&r" (__val), "=m" (*futex) \
- : "r" (futex), "r" (id), "m" (*futex) \
+ : "r" (futex), "r" (1), "m" (*futex) \
: "cr0", "memory"); \
__val; \
})
-#define lll_robust_mutex_trylock(lock, id) __lll_robust_trylock (&(lock), id)
-
-/* Set *futex to 1 if it is 0, atomically. Returns the old value */
-#define __lll_trylock(futex) __lll_robust_trylock (futex, 1)
-
#define lll_mutex_trylock(lock) __lll_trylock (&(lock))
/* Set *futex to 2 if it is 0, atomically. Returns the old value */
-#define __lll_cond_trylock(futex) __lll_robust_trylock (futex, 2)
-
+#define __lll_cond_trylock(futex) \
+ ({ int __val; \
+ __asm __volatile ("1: lwarx %0,0,%2\n" \
+ " cmpwi 0,%0,0\n" \
+ " bne 2f\n" \
+ " stwcx. %3,0,%2\n" \
+ " bne- 1b\n" \
+ "2: " __lll_acq_instr \
+ : "=&r" (__val), "=m" (*futex) \
+ : "r" (futex), "r" (2), "m" (*futex) \
+ : "cr0", "memory"); \
+ __val; \
+ })
#define lll_mutex_cond_trylock(lock) __lll_cond_trylock (&(lock))
extern void __lll_lock_wait (int *futex) attribute_hidden;
-extern int __lll_robust_lock_wait (int *futex) attribute_hidden;
#define lll_mutex_lock(lock) \
(void) ({ \
@@ -169,16 +131,6 @@ extern int __lll_robust_lock_wait (int *futex) attribute_hidden;
__lll_lock_wait (__futex); \
})
-#define lll_robust_mutex_lock(lock, id) \
- ({ \
- int *__futex = &(lock); \
- int __val = 0; \
- if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id, \
- 0), 0)) \
- __val = __lll_robust_lock_wait (__futex); \
- __val; \
- })
-
#define lll_mutex_cond_lock(lock) \
(void) ({ \
int *__futex = &(lock); \
@@ -187,22 +139,8 @@ extern int __lll_robust_lock_wait (int *futex) attribute_hidden;
__lll_lock_wait (__futex); \
})
-#define lll_robust_mutex_cond_lock(lock, id) \
- ({ \
- int *__futex = &(lock); \
- int __val = 0; \
- int __id = id | FUTEX_WAITERS; \
- if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, __id,\
- 0), 0)) \
- __val = __lll_robust_lock_wait (__futex); \
- __val; \
- })
-
-
extern int __lll_timedlock_wait
(int *futex, const struct timespec *) attribute_hidden;
-extern int __lll_robust_timedlock_wait
- (int *futex, const struct timespec *) attribute_hidden;
#define lll_mutex_timedlock(lock, abstime) \
({ \
@@ -214,16 +152,6 @@ extern int __lll_robust_timedlock_wait
__val; \
})
-#define lll_robust_mutex_timedlock(lock, abstime, id) \
- ({ \
- int *__futex = &(lock); \
- int __val = 0; \
- if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id, \
- 0), 0)) \
- __val = __lll_robust_timedlock_wait (__futex, abstime); \
- __val; \
- })
-
#define lll_mutex_unlock(lock) \
((void) ({ \
int *__futex = &(lock); \
@@ -232,14 +160,6 @@ extern int __lll_robust_timedlock_wait
lll_futex_wake (__futex, 1); \
}))
-#define lll_robust_mutex_unlock(lock) \
- ((void) ({ \
- int *__futex = &(lock); \
- int __val = atomic_exchange_rel (__futex, 0); \
- if (__builtin_expect (__val & FUTEX_WAITERS, 0)) \
- lll_futex_wake (__futex, 1); \
- }))
-
#define lll_mutex_unlock_force(lock) \
((void) ({ \
int *__futex = &(lock); \
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-08 18:21:22 +0000