[COMMITTED PATCH] tile: Add priority inheritance futex support

[COMMITTED PATCH] tile: Add priority inheritance futex support

[Chris Metcalf]

---
 ports/ChangeLog.tile                               |    9 ++++++
 .../unix/sysv/linux/tile/nptl/lowlevellock.h       |   28 ++++++++++++++++++++
 2 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/ports/ChangeLog.tile b/ports/ChangeLog.tile
index a473b30..6184bf6 100644
--- a/ports/ChangeLog.tile
+++ b/ports/ChangeLog.tile
@@ -1,3 +1,12 @@
+2013-02-28  Chris Metcalf  <cmetcalf@tilera.com>
+
+	* sysdeps/unix/sysv/linux/tile/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/tile/tilegx/tilegx64/nptl/libc.abilist:
diff --git a/ports/sysdeps/unix/sysv/linux/tile/nptl/lowlevellock.h b/ports/sysdeps/unix/sysv/linux/tile/nptl/lowlevellock.h
index e6f5d19..a9822ec 100644
--- a/ports/sysdeps/unix/sysv/linux/tile/nptl/lowlevellock.h
+++ b/ports/sysdeps/unix/sysv/linux/tile/nptl/lowlevellock.h
@@ -38,6 +38,8 @@
 #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
 
@@ -139,7 +141,33 @@
     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);					      \
+    long int __ret;							      \
+    int __op = FUTEX_WAIT_REQUEUE_PI | clockbit;			      \
+									      \
+    __ret = INTERNAL_SYSCALL (futex, __err, 5, (futexp),		      \
+			      __lll_private_flag (__op, private),	      \
+			      (val), (timespec), mutex); 		      \
+    INTERNAL_SYSCALL_ERROR_P (__ret, __err);				      \
+  })
+
+#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);				      \
+  })
 
 
 static inline int __attribute__ ((always_inline))
-- 
1.7.1