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Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h')
-rw-r--r--nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h167
1 files changed, 76 insertions, 91 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h
index be47bd752e..88e94b9905 100644
--- a/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h
@@ -19,19 +19,24 @@
#ifndef _LOWLEVELLOCK_H
#define _LOWLEVELLOCK_H 1
+#ifndef __ASSEMBLER__
#include <time.h>
#include <sys/param.h>
#include <bits/pthreadtypes.h>
#include <kernel-features.h>
+#endif
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
+#define FUTEX_CMP_REQUEUE 4
+#define FUTEX_WAKE_OP 5
#define FUTEX_LOCK_PI 6
#define FUTEX_UNLOCK_PI 7
#define FUTEX_TRYLOCK_PI 8
#define FUTEX_PRIVATE_FLAG 128
+#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
/* Values for 'private' parameter of locking macros. Yes, the
definition seems to be backwards. But it is not. The bit will be
@@ -64,20 +69,30 @@
# endif
#endif
+#ifndef __ASSEMBLER__
/* Initializer for compatibility lock. */
-#define LLL_MUTEX_LOCK_INITIALIZER (0)
-#define LLL_MUTEX_LOCK_INITIALIZER_LOCKED (1)
-#define LLL_MUTEX_LOCK_INITIALIZER_WAITERS (2)
-
-extern int __lll_mutex_lock_wait (int val, int *__futex) attribute_hidden;
-extern int __lll_mutex_timedlock_wait (int val, int *__futex,
- const struct timespec *abstime)
- attribute_hidden;
-extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
-
-
-#define lll_mutex_trylock(futex) \
+#define LLL_LOCK_INITIALIZER (0)
+#define LLL_LOCK_INITIALIZER_LOCKED (1)
+#define LLL_LOCK_INITIALIZER_WAITERS (2)
+
+extern int __lll_lock_wait_private (int val, int *__futex)
+ attribute_hidden;
+extern int __lll_lock_wait (int val, int *__futex, int private)
+ attribute_hidden;
+extern int __lll_timedlock_wait (int val, int *__futex,
+ const struct timespec *abstime, int private)
+ attribute_hidden;
+extern int __lll_robust_lock_wait (int val, int *__futex, int private)
+ attribute_hidden;
+extern int __lll_robust_timedlock_wait (int val, int *__futex,
+ const struct timespec *abstime,
+ int private)
+ attribute_hidden;
+extern int __lll_unlock_wake_private (int *__futex) attribute_hidden;
+extern int __lll_unlock_wake (int *__futex, int private) attribute_hidden;
+
+#define lll_trylock(futex) \
({ unsigned char __result; \
__asm __volatile ("\
.align 2\n\
@@ -94,12 +109,12 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
negc %0,%0"\
: "=r" (__result) \
: "r" (&(futex)), \
- "r" (LLL_MUTEX_LOCK_INITIALIZER_LOCKED), \
- "r" (LLL_MUTEX_LOCK_INITIALIZER) \
+ "r" (LLL_LOCK_INITIALIZER_LOCKED), \
+ "r" (LLL_LOCK_INITIALIZER) \
: "r0", "r1", "r2", "t", "memory"); \
__result; })
-#define lll_robust_mutex_trylock(futex, id) \
+#define lll_robust_trylock(futex, id) \
({ unsigned char __result; \
__asm __volatile ("\
.align 2\n\
@@ -117,11 +132,11 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=r" (__result) \
: "r" (&(futex)), \
"r" (id), \
- "r" (LLL_MUTEX_LOCK_INITIALIZER) \
+ "r" (LLL_LOCK_INITIALIZER) \
: "r0", "r1", "r2", "t", "memory"); \
__result; })
-#define lll_mutex_cond_trylock(futex) \
+#define lll_cond_trylock(futex) \
({ unsigned char __result; \
__asm __volatile ("\
.align 2\n\
@@ -138,13 +153,13 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
negc %0,%0"\
: "=r" (__result) \
: "r" (&(futex)), \
- "r" (LLL_MUTEX_LOCK_INITIALIZER_WAITERS), \
- "r" (LLL_MUTEX_LOCK_INITIALIZER) \
+ "r" (LLL_LOCK_INITIALIZER_WAITERS), \
+ "r" (LLL_LOCK_INITIALIZER) \
: "r0", "r1", "r2", "t", "memory"); \
__result; })
-#define lll_mutex_lock(futex) \
- (void) ({ int __result, val, *__futex = &(futex); \
+#define lll_lock(futex, private) \
+ (void) ({ int __result, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
mova 1f,r0\n\
@@ -159,10 +174,17 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=&r" (__result) : "r" (1), "r" (__futex) \
: "r0", "r1", "t", "memory"); \
if (__result) \
- __lll_mutex_lock_wait (__result, __futex); })
-
-#define lll_robust_mutex_lock(futex, id) \
- ({ int __result, val, *__futex = &(futex); \
+ { \
+ if (__builtin_constant_p (private) \
+ && (private) == LLL_PRIVATE) \
+ __lll_lock_wait_private (__result, __futex); \
+ else \
+ __lll_lock_wait (__result, __futex, (private)); \
+ } \
+ })
+
+#define lll_robust_lock(futex, id, private) \
+ ({ int __result, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
mova 1f,r0\n\
@@ -177,13 +199,13 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=&r" (__result) : "r" (id), "r" (__futex) \
: "r0", "r1", "t", "memory"); \
if (__result) \
- __result = __lll_robust_mutex_lock_wait (__result, __futex); \
+ __result = __lll_robust_lock_wait (__result, __futex, private); \
__result; })
/* Special version of lll_mutex_lock which causes the unlock function to
always wakeup waiters. */
-#define lll_mutex_cond_lock(futex) \
- (void) ({ int __result, val, *__futex = &(futex); \
+#define lll_cond_lock(futex, private) \
+ (void) ({ int __result, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
mova 1f,r0\n\
@@ -198,10 +220,10 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=&r" (__result) : "r" (2), "r" (__futex) \
: "r0", "r1", "t", "memory"); \
if (__result) \
- __lll_mutex_lock_wait (__result, __futex); })
+ __lll_lock_wait (__result, __futex, private); })
-#define lll_robust_mutex_cond_lock(futex, id) \
- ({ int __result, val, *__futex = &(futex); \
+#define lll_robust_cond_lock(futex, id, private) \
+ ({ int __result, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
mova 1f,r0\n\
@@ -216,11 +238,11 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=&r" (__result) : "r" (id | FUTEX_WAITERS), "r" (__futex) \
: "r0", "r1", "t", "memory"); \
if (__result) \
- __result = __lll_robust_mutex_lock_wait (__result, __futex); \
+ __result = __lll_robust_lock_wait (__result, __futex, private); \
__result; })
-#define lll_mutex_timedlock(futex, timeout) \
- ({ int __result, val, *__futex = &(futex); \
+#define lll_timedlock(futex, timeout, private) \
+ ({ int __result, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
mova 1f,r0\n\
@@ -235,11 +257,11 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=&r" (__result) : "r" (1), "r" (__futex) \
: "r0", "r1", "t", "memory"); \
if (__result) \
- __result = __lll_mutex_timedlock_wait (__result, __futex, timeout); \
+ __result = __lll_timedlock_wait (__result, __futex, timeout, private); \
__result; })
-#define lll_robust_mutex_timedlock(futex, timeout, id) \
- ({ int __result, val, *__futex = &(futex); \
+#define lll_robust_timedlock(futex, timeout, id, private) \
+ ({ int __result, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
mova 1f,r0\n\
@@ -254,11 +276,11 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=&r" (__result) : "r" (id), "r" (__futex) \
: "r0", "r1", "t", "memory"); \
if (__result) \
- __result = __lll_robust_mutex_timedlock_wait (__result, __futex, \
- timeout); \
+ __result = __lll_robust_timedlock_wait (__result, __futex, \
+ timeout, private); \
__result; })
-#define lll_mutex_unlock(futex) \
+#define lll_unlock(futex, private) \
(void) ({ int __result, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
@@ -272,9 +294,16 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=&r" (__result) : "r" (__futex) \
: "r0", "r1", "memory"); \
if (__result) \
- __lll_mutex_unlock_wake (__futex); })
-
-#define lll_robust_mutex_unlock(futex) \
+ { \
+ if (__builtin_constant_p (private) \
+ && (private) == LLL_PRIVATE) \
+ __lll_unlock_wake_private (__futex); \
+ else \
+ __lll_unlock_wake (__futex, (private)); \
+ } \
+ })
+
+#define lll_robust_unlock(futex, private) \
(void) ({ int __result, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
@@ -288,9 +317,9 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
: "=&r" (__result) : "r" (__futex), "r" (FUTEX_WAITERS) \
: "r0", "r1", "memory"); \
if (__result) \
- __lll_mutex_unlock_wake (__futex); })
+ __lll_unlock_wake (__futex, private); })
-#define lll_robust_mutex_dead(futex) \
+#define lll_robust_dead(futex, private) \
(void) ({ int __ignore, *__futex = &(futex); \
__asm __volatile ("\
.align 2\n\
@@ -303,22 +332,7 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
1: mov r1,r15"\
: "=&r" (__ignore) : "r" (__futex), "r" (FUTEX_OWNER_DIED) \
: "r0", "r1", "memory"); \
- lll_futex_wake (__futex, 1, LLL_SHARED); })
-
-#define lll_mutex_islocked(futex) \
- (futex != 0)
-
-
-/* We have a separate internal lock implementation which is not tied
- to binary compatibility. */
-
-/* Type for lock object. */
-typedef int lll_lock_t;
-
-/* Initializers for lock. */
-#define LLL_LOCK_INITIALIZER (0)
-#define LLL_LOCK_INITIALIZER_LOCKED (1)
-
+ lll_futex_wake (__futex, 1, private); })
# ifdef NEED_SYSCALL_INST_PAD
# define SYSCALL_WITH_INST_PAD "\
@@ -367,25 +381,14 @@ typedef int lll_lock_t;
} while (0)
-/* The states of a lock are:
- 0 - untaken
- 1 - taken by one user
- 2 - taken by more users */
-
-#define lll_trylock(futex) lll_mutex_trylock (futex)
-#define lll_lock(futex) lll_mutex_lock (futex)
-#define lll_unlock(futex) lll_mutex_unlock (futex)
-
#define lll_islocked(futex) \
(futex != LLL_LOCK_INITIALIZER)
-
/* The kernel notifies a process with uses CLONE_CLEARTID via futex
wakeup when the clone terminates. The memory location contains the
thread ID while the clone is running and is reset to zero
afterwards. */
-extern int __lll_wait_tid (int *tid) attribute_hidden;
#define lll_wait_tid(tid) \
do { \
__typeof (tid) *__tid = &(tid); \
@@ -407,24 +410,6 @@ extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime)
} \
__result; })
-
-/* Conditional variable handling. */
-
-extern void __lll_cond_wait (pthread_cond_t *cond) attribute_hidden;
-extern int __lll_cond_timedwait (pthread_cond_t *cond,
- const struct timespec *abstime)
- attribute_hidden;
-extern void __lll_cond_wake (pthread_cond_t *cond) attribute_hidden;
-extern void __lll_cond_broadcast (pthread_cond_t *cond) attribute_hidden;
-
-
-#define lll_cond_wait(cond) \
- __lll_cond_wait (cond)
-#define lll_cond_timedwait(cond, abstime) \
- __lll_cond_timedwait (cond, abstime)
-#define lll_cond_wake(cond) \
- __lll_cond_wake (cond)
-#define lll_cond_broadcast(cond) \
- __lll_cond_broadcast (cond)
+#endif /* !__ASSEMBLER__ */
#endif /* lowlevellock.h */
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