Re: PI mutex support for pthread_cond_* now in nptl

["Joseph S. Myers" <joseph@codesourcery.com>]

I've applied this patch to implement this for ARM.

diff --git a/ports/ChangeLog.arm b/ports/ChangeLog.arm
index 3a5880b..5b5220f 100644
--- a/ports/ChangeLog.arm
+++ b/ports/ChangeLog.arm
@@ -1,3 +1,13 @@
+2013-02-18  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #14920]
+	* sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h
+	(FUTEX_WAIT_REQUEUE_PI): Define.
+	(FUTEX_CMP_REQUEUE_PI): Likewise.
+	(lll_futex_wait_requeue_pi): Likewise.
+	(lll_futex_timed_wait_requeue_pi): Likewise.
+	(lll_futex_cmp_requeue_pi): Likewise.
+
 2013-02-18  Siddhesh Poyarekar  <siddhesh@redhat.com>
 
 	* sysdeps/unix/sysv/linux/arm/nptl/libc.abilist: Add
diff --git a/ports/sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h b/ports/sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h
index 0278812..fe21cda 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h
+++ b/ports/sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h
@@ -36,6 +36,8 @@
 #define FUTEX_TRYLOCK_PI	8
 #define FUTEX_WAIT_BITSET	9
 #define FUTEX_WAKE_BITSET	10
+#define FUTEX_WAIT_REQUEUE_PI   11
+#define FUTEX_CMP_REQUEUE_PI    12
 #define FUTEX_PRIVATE_FLAG	128
 #define FUTEX_CLOCK_REALTIME	256
 
@@ -141,6 +143,32 @@
     INTERNAL_SYSCALL_ERROR_P (__ret, __err);				      \
   })
 
+/* Priority Inheritance support.  */
+#define lll_futex_wait_requeue_pi(futexp, val, mutex, private) \
+  lll_futex_timed_wait_requeue_pi (futexp, val, NULL, 0, mutex, private)
+
+#define lll_futex_timed_wait_requeue_pi(futexp, val, timespec, clockbit,      \
+					mutex, private)			      \
+  ({									      \
+    INTERNAL_SYSCALL_DECL (__err);					      \
+    int __op = FUTEX_WAIT_REQUEUE_PI | clockbit;			      \
+									      \
+    INTERNAL_SYSCALL (futex, __err, 5, (futexp),			      \
+		      __lll_private_flag (__op, private),		      \
+		      (val), (timespec), mutex); 			      \
+  })
+
+#define lll_futex_cmp_requeue_pi(futexp, nr_wake, nr_move, mutex, val, priv)  \
+  ({									      \
+    INTERNAL_SYSCALL_DECL (__err);					      \
+    long int __ret;							      \
+									      \
+    __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp),		      \
+			      __lll_private_flag (FUTEX_CMP_REQUEUE_PI, priv),\
+			      (nr_wake), (nr_move), (mutex), (val));	      \
+    INTERNAL_SYSCALL_ERROR_P (__ret, __err);				      \
+  })
+
 
 #define lll_trylock(lock)	\
   atomic_compare_and_exchange_val_acq(&(lock), 1, 0)

-- 
Joseph S. Myers
joseph@codesourcery.com