* include/atomic.h (atomic_and, atomic_or): Define.

5 files changed, 363 insertions, 20 deletions

diff --git a/nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h
index ab325d2b06..1a2e8cbb07 100644
--- a/nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -64,6 +64,15 @@
     INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret : __ret;		      \
   })
 
+#define lll_robust_mutex_dead(futexv) \
+  do									      \
+    {									      \
+      int *__futexp = &(futexv);					      \
+      atomic_or (__futexp, FUTEX_OWNER_DIED);				      \
+      lll_futex_wake (__futexp, 1);					      \
+    }									      \
+  while (0)
+
 /* Returns non-zero if error happened, zero if success.  */
 #define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val) \
   ({									      \
@@ -106,7 +115,16 @@ __lll_mutex_cond_trylock(int *futex)
 #define lll_mutex_cond_trylock(lock)	__lll_mutex_cond_trylock (&(lock))
 
 
+static inline int __attribute__((always_inline))
+__lll_robust_mutex_trylock(int *futex, int id)
+{
+  return atomic_compare_and_exchange_val_acq (futex, id, 0) != 0;
+}
+#define lll_robust_mutex_trylock(lock, id) \
+  __lll_robust_mutex_trylock (&(lock), id)
+
 extern void __lll_lock_wait (int *futex) attribute_hidden;
+extern int __lll_robust_lock_wait (int *futex) attribute_hidden;
 
 static inline void __attribute__((always_inline))
 __lll_mutex_lock(int *futex)
@@ -117,6 +135,18 @@ __lll_mutex_lock(int *futex)
 #define lll_mutex_lock(futex) __lll_mutex_lock (&(futex))
 
 
+static inline int __attribute__ ((always_inline))
+__lll_robust_mutex_lock (int *futex, int id)
+{
+  int result = 0;
+  if (atomic_compare_and_exchange_bool_acq (futex, id, 0) != 0)
+    result = __lll_robust_lock_wait (futex);
+  return result;
+}
+#define lll_robust_mutex_lock(futex, id) \
+  __lll_robust_mutex_lock (&(futex), id)
+
+
 static inline void __attribute__ ((always_inline))
 __lll_mutex_cond_lock (int *futex)
 {
@@ -126,8 +156,14 @@ __lll_mutex_cond_lock (int *futex)
 #define lll_mutex_cond_lock(futex) __lll_mutex_cond_lock (&(futex))
 
 
+#define lll_robust_mutex_cond_lock(futex, id) \
+  __lll_robust_mutex_lock (&(futex), (id) | FUTEX_WAITERS)
+
+
 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;
 
 static inline int __attribute__ ((always_inline))
 __lll_mutex_timedlock (int *futex, const struct timespec *abstime)
@@ -141,6 +177,19 @@ __lll_mutex_timedlock (int *futex, const struct timespec *abstime)
   __lll_mutex_timedlock (&(futex), abstime)
 
 
+static inline int __attribute__ ((always_inline))
+__lll_robust_mutex_timedlock (int *futex, const struct timespec *abstime,
+			      int id)
+{
+  int result = 0;
+  if (atomic_compare_and_exchange_bool_acq (futex, id, 0) != 0)
+    result = __lll_robust_timedlock_wait (futex, abstime);
+  return result;
+}
+#define lll_robust_mutex_timedlock(futex, abstime, id) \
+  __lll_robust_mutex_timedlock (&(futex), abstime, id)
+
+
 static inline void __attribute__ ((always_inline))
 __lll_mutex_unlock (int *futex)
 {
@@ -152,6 +201,17 @@ __lll_mutex_unlock (int *futex)
 
 
 static inline void __attribute__ ((always_inline))
+__lll_robust_mutex_unlock (int *futex, int mask)
+{
+  int val = atomic_exchange_rel (futex, 0);
+  if (__builtin_expect (val & mask, 0))
+    lll_futex_wake (futex, 1);
+}
+#define lll_robust_mutex_unlock(futex) \
+  __lll_robust_mutex_unlock(&(futex), FUTEX_WAITERS)
+
+
+static inline void __attribute__ ((always_inline))
 __lll_mutex_unlock_force (int *futex)
 {
   (void) atomic_exchange_rel (futex, 0);
diff --git a/nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
index 4219fe2716..ece9a7fc72 100644
--- a/nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
 
@@ -55,6 +55,15 @@
    _r10 == -1 ? -_retval : _retval;					\
 })
 
+#define lll_robust_mutex_dead(futexv)					\
+do									\
+  {									\
+    int *__futexp = &(futexv);						\
+    atomic_or (__futexp, FUTEX_OWNER_DIED);				\
+    DO_INLINE_SYSCALL(futex, 3, (long) __futexp, FUTEX_WAKE, 1);	\
+  }									\
+while (0)
+
 /* Returns non-zero if error happened, zero if success.  */
 #define lll_futex_requeue(ftx, nr_wake, nr_move, mutex, val)		     \
 ({									     \
@@ -79,12 +88,19 @@
 #define lll_mutex_trylock(futex) __lll_mutex_trylock (&(futex))
 
 
+#define __lll_robust_mutex_trylock(futex, id) \
+  (atomic_compare_and_exchange_val_acq (futex, id, 0) != 0)
+#define lll_robust_mutex_trylock(futex, id) \
+  __lll_robust_mutex_trylock (&(futex), id)
+
+
 #define __lll_mutex_cond_trylock(futex) \
   (atomic_compare_and_exchange_val_acq (futex, 2, 0) != 0)
 #define lll_mutex_cond_trylock(futex) __lll_mutex_cond_trylock (&(futex))
 
 
 extern void __lll_lock_wait (int *futex) attribute_hidden;
+extern int __lll_robust_lock_wait (int *futex) attribute_hidden;
 
 
 #define __lll_mutex_lock(futex)						\
@@ -96,6 +112,18 @@ extern void __lll_lock_wait (int *futex) attribute_hidden;
 #define lll_mutex_lock(futex) __lll_mutex_lock (&(futex))
 
 
+#define __lll_robust_mutex_lock(futex, id)				\
+  ({									\
+    int *__futex = (futex);						\
+    int __val = 0;							\
+									\
+    if (atomic_compare_and_exchange_bool_acq (__futex, id, 0) != 0)	\
+      __val = __lll_robust_lock_wait (__futex);				\
+    __val;								\
+  })
+#define lll_robust_mutex_lock(futex, id) __lll_robust_mutex_lock (&(futex), id)
+
+
 #define __lll_mutex_cond_lock(futex)					\
   ((void) ({								\
     int *__futex = (futex);						\
@@ -105,8 +133,24 @@ extern void __lll_lock_wait (int *futex) attribute_hidden;
 #define lll_mutex_cond_lock(futex) __lll_mutex_cond_lock (&(futex))
 
 
+#define __lll_robust_mutex_cond_lock(futex, id)				\
+  ({									\
+    int *__futex = (futex);						\
+    int __val = 0;							\
+    int __id = (id) | FUTEX_WAITERS;					\
+									\
+    if (atomic_compare_and_exchange_bool_acq (__futex, __id, 0) != 0)	\
+      __val = __lll_robust_lock_wait (__futex);				\
+    __val;								\
+  })
+#define lll_robust_mutex_cond_lock(futex, id) \
+  __lll_robust_mutex_cond_lock (&(futex), id)
+
+
 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(futex, abstime)				\
@@ -122,6 +166,19 @@ extern int __lll_timedlock_wait (int *futex, const struct timespec *)
   __lll_mutex_timedlock (&(futex), abstime)
 
 
+#define __lll_robust_mutex_timedlock(futex, abstime, id)		\
+  ({									\
+    int *__futex = (futex);						\
+    int __val = 0;							\
+									\
+    if (atomic_compare_and_exchange_bool_acq (__futex, id, 0) != 0)	\
+      __val = __lll_robust_timedlock_wait (__futex, abstime);		\
+    __val;								\
+  })
+#define lll_robust_mutex_timedlock(futex, abstime, id) \
+  __lll_robust_mutex_timedlock (&(futex), abstime, id)
+
+
 #define __lll_mutex_unlock(futex)			\
   ((void) ({						\
     int *__futex = (futex);				\
@@ -134,6 +191,18 @@ extern int __lll_timedlock_wait (int *futex, const struct timespec *)
   __lll_mutex_unlock(&(futex))
 
 
+#define __lll_robust_mutex_unlock(futex)		\
+  ((void) ({						\
+    int *__futex = (futex);				\
+    int __val = atomic_exchange_rel (__futex, 0);	\
+							\
+    if (__builtin_expect (__val & FUTEX_WAITERS, 0))	\
+      lll_futex_wake (__futex, 1);			\
+  }))
+#define lll_robust_mutex_unlock(futex) \
+  __lll_robust_mutex_unlock(&(futex))
+
+
 #define __lll_mutex_unlock_force(futex)		\
   ((void) ({					\
     int *__futex = (futex);			\
diff --git a/nptl/sysdeps/unix/sysv/linux/lowlevelrobustlock.c b/nptl/sysdeps/unix/sysv/linux/lowlevelrobustlock.c
new file mode 100644
index 0000000000..b7faeaf257
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/lowlevelrobustlock.c
@@ -0,0 +1,95 @@
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+   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
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+#include <sys/time.h>
+#include <pthreadP.h>
+
+
+int
+__lll_robust_lock_wait (int *futex)
+{
+  int oldval = *futex;
+  int tid = THREAD_GETMEM (THREAD_SELF, tid);
+
+  do
+    {
+      if (__builtin_expect (oldval & FUTEX_OWNER_DIED, 0))
+	return oldval;
+
+      int newval = oldval | FUTEX_WAITERS;
+      if (oldval != newval
+	  && atomic_compare_and_exchange_bool_acq (futex, newval, oldval))
+	continue;
+
+      lll_futex_wait (futex, newval);
+    }
+  while ((oldval = atomic_compare_and_exchange_val_acq (futex, tid, 0)) != 0);
+  return 0;
+}
+
+
+int
+__lll_robust_timedlock_wait (int *futex, const struct timespec *abstime)
+{
+  /* Reject invalid timeouts.  */
+  if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+    return EINVAL;
+
+  int tid = THREAD_GETMEM (THREAD_SELF, tid);
+
+  do
+    {
+      struct timeval tv;
+      struct timespec rt;
+
+      /* Get the current time.  */
+      (void) __gettimeofday (&tv, NULL);
+
+      /* Compute relative timeout.  */
+      rt.tv_sec = abstime->tv_sec - tv.tv_sec;
+      rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+      if (rt.tv_nsec < 0)
+	{
+	  rt.tv_nsec += 1000000000;
+	  --rt.tv_sec;
+	}
+
+      /* Already timed out?  */
+      if (rt.tv_sec < 0)
+	return ETIMEDOUT;
+
+      /* Wait.  */
+      int oldval = *futex;
+      if (__builtin_expect (oldval & FUTEX_OWNER_DIED, 0))
+	return oldval;
+
+      int newval = oldval | FUTEX_WAITERS;
+      if (oldval != newval
+	  && atomic_compare_and_exchange_bool_acq (futex, newval, oldval))
+	continue;
+
+      lll_futex_timed_wait (futex, newval, &rt);
+    }
+  while (atomic_compare_and_exchange_bool_acq (futex, tid, 0));
+
+  return 0;
+}
diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
index f9eaa11e98..fcc1240fef 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 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
 
@@ -69,6 +69,17 @@
     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) \
   ({									      \
@@ -102,8 +113,8 @@
 # define __lll_rel_instr	"sync"
 #endif
 
-/* Set *futex to 1 if it is 0, atomically.  Returns the old value */
-#define __lll_trylock(futex) \
+/* Set *futex to ID if it is 0, atomically.  Returns the old value */
+#define __lll_robust_trylock(futex, id) \
   ({ int __val;								      \
      __asm __volatile ("1:	lwarx	%0,0,%2\n"			      \
 		       "	cmpwi	0,%0,0\n"			      \
@@ -112,31 +123,26 @@
 		       "	bne-	1b\n"				      \
 		       "2:	" __lll_acq_instr			      \
 		       : "=&r" (__val), "=m" (*futex)			      \
-		       : "r" (futex), "r" (1), "m" (*futex)		      \
+		       : "r" (futex), "r" (id), "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) \
-  ({ 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_cond_trylock(futex) __lll_robust_trylock (futex, 2)
+
 #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) ({								      \
@@ -146,6 +152,16 @@ extern void __lll_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);						      \
@@ -154,8 +170,22 @@ extern void __lll_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) \
   ({									      \
@@ -167,6 +197,16 @@ extern int __lll_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);						      \
@@ -175,6 +215,14 @@ extern int __lll_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);						      \
diff --git a/nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h
index 5f20537943..6baab90f56 100644
--- a/nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
 
@@ -85,6 +85,17 @@
   })
 
 
+#define lll_robust_mutex_dead(futexv) \
+  do									      \
+    {									      \
+      int *__futexp = &(futexv);					      \
+									      \
+      atomic_or (__futexp, FUTEX_OWNER_DIED);				      \
+      lll_futex_wake (__futexp, 1);					      \
+    }									      \
+  while (0)
+
+
 /* Returns non-zero if error happened, zero if success.  */
 #define lll_futex_requeue(futex, nr_wake, nr_move, mutex, val) \
   ({									      \
@@ -167,7 +178,23 @@ __lll_mutex_cond_trylock (int *futex)
 #define lll_mutex_cond_trylock(futex) __lll_mutex_cond_trylock (&(futex))
 
 
+static inline int
+__attribute__ ((always_inline))
+__lll_robust_mutex_trylock (int *futex, int id)
+{
+    unsigned int old;
+
+    __asm __volatile ("cs %0,%3,%1"
+		       : "=d" (old), "=Q" (*futex)
+		       : "0" (0), "d" (id), "m" (*futex) : "cc", "memory" );
+    return old != 0;
+}
+#define lll_robust_mutex_trylock(futex, id) \
+  __lll_robust_mutex_trylock (&(futex), id)
+
+
 extern void __lll_lock_wait (int *futex) attribute_hidden;
+extern int __lll_robust_lock_wait (int *futex) attribute_hidden;
 
 static inline void
 __attribute__ ((always_inline))
@@ -178,6 +205,17 @@ __lll_mutex_lock (int *futex)
 }
 #define lll_mutex_lock(futex) __lll_mutex_lock (&(futex))
 
+static inline int
+__attribute__ ((always_inline))
+__lll_robust_mutex_lock (int *futex, int id)
+{
+  int result = 0;
+  if (atomic_compare_and_exchange_bool_acq (futex, id, 0) != 0)
+    result = __lll_robust_lock_wait (futex);
+  return result;
+}
+#define lll_robust_mutex_lock(futex, id) __lll_robust_mutex_lock (&(futex), id)
+
 static inline void
 __attribute__ ((always_inline))
 __lll_mutex_cond_lock (int *futex)
@@ -187,8 +225,13 @@ __lll_mutex_cond_lock (int *futex)
 }
 #define lll_mutex_cond_lock(futex) __lll_mutex_cond_lock (&(futex))
 
+#define lll_robust_mutex_cond_lock(futex, id) \
+  __lll_robust_mutex_lock (&(futex), (id) | FUTEX_WAITERS)
+
 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;
 
 static inline int
 __attribute__ ((always_inline))
@@ -202,6 +245,19 @@ __lll_mutex_timedlock (int *futex, const struct timespec *abstime)
 #define lll_mutex_timedlock(futex, abstime) \
   __lll_mutex_timedlock (&(futex), abstime)
 
+static inline int
+__attribute__ ((always_inline))
+__lll_robust_mutex_timedlock (int *futex, const struct timespec *abstime,
+			      int id)
+{
+  int result = 0;
+  if (atomic_compare_and_exchange_bool_acq (futex, id, 0) != 0)
+    result = __lll_robust_timedlock_wait (futex, abstime);
+  return result;
+}
+#define lll_robust_mutex_timedlock(futex, abstime, id) \
+  __lll_robust_mutex_timedlock (&(futex), abstime, id)
+
 
 static inline void
 __attribute__ ((always_inline))
@@ -220,6 +276,21 @@ __lll_mutex_unlock (int *futex)
 
 static inline void
 __attribute__ ((always_inline))
+__lll_robust_mutex_unlock (int *futex, int mask)
+{
+  int oldval;
+  int newval = 0;
+
+  lll_compare_and_swap (futex, oldval, newval, "slr %2,%2");
+  if (oldval & mask)
+    lll_futex_wake (futex, 1);
+}
+#define lll_robust_mutex_unlock(futex) \
+  __lll_robust_mutex_unlock(&(futex), FUTEX_WAITERS)
+
+
+static inline void
+__attribute__ ((always_inline))
 __lll_mutex_unlock_force (int *futex)
 {
   *futex = 0;