* pthreadP.h (PTHREAD_RWLOCK_PREFER_READER_P): Define.

	* pthread_rwlock_rdlock.c: Use PTHREAD_RWLOCK_PREFER_READER_P.
	* pthread_rwlock_timedrdlock.c: Likewise.
	* pthread_rwlock_tryrdlock.c: Likewise.

diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index 2ac2c44..fc79f9a 100644 (file)
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,5 +1,10 @@
 2007-05-26  Ulrich Drepper  <drepper@redhat.com>
 
+       * pthreadP.h (PTHREAD_RWLOCK_PREFER_READER_P): Define.
+       * pthread_rwlock_rdlock.c: Use PTHREAD_RWLOCK_PREFER_READER_P.
+       * pthread_rwlock_timedrdlock.c: Likewise.
+       * pthread_rwlock_tryrdlock.c: Likewise.
+
        * sysdeps/unix/sysv/linux/x86_64/sem_trywait.S (sem_trywait): Tiny
        optimization.
 

diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 21ce6fe..46e2476 100644 (file)
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -118,6 +118,11 @@ enum
    | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
 
 
+/* Check whether rwlock prefers readers.   */
+#define PTHREAD_RWLOCK_PREFER_READER_P(rwlock) \
+  ((rwlock)->__data.__flags == 0)
+
+
 /* Bits used in robust mutex implementation.  */
 #define FUTEX_WAITERS          0x80000000
 #define FUTEX_OWNER_DIED       0x40000000

diff --git a/nptl/pthread_rwlock_rdlock.c b/nptl/pthread_rwlock_rdlock.c
index e225d70..6764c1e 100644 (file)
--- a/nptl/pthread_rwlock_rdlock.c
+++ b/nptl/pthread_rwlock_rdlock.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
 
@@ -40,7 +40,7 @@ __pthread_rwlock_rdlock (rwlock)
       if (rwlock->__data.__writer == 0
          /* ...and if either no writer is waiting or we prefer readers.  */
          && (!rwlock->__data.__nr_writers_queued
-             || rwlock->__data.__flags == 0))
+             || PTHREAD_RWLOCK_PREFER_READER_P (rwlock)))
        {
          /* Increment the reader counter.  Avoid overflow.  */
          if (__builtin_expect (++rwlock->__data.__nr_readers == 0, 0))

diff --git a/nptl/pthread_rwlock_timedrdlock.c b/nptl/pthread_rwlock_timedrdlock.c
index 80ea83a..caff589 100644 (file)
--- a/nptl/pthread_rwlock_timedrdlock.c
+++ b/nptl/pthread_rwlock_timedrdlock.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
 
@@ -43,7 +43,7 @@ pthread_rwlock_timedrdlock (rwlock, abstime)
       if (rwlock->__data.__writer == 0
          /* ...and if either no writer is waiting or we prefer readers.  */
          && (!rwlock->__data.__nr_writers_queued
-             || rwlock->__data.__flags == 0))
+             || PTHREAD_RWLOCK_PREFER_READER_P (rwlock)))
        {
          /* Increment the reader counter.  Avoid overflow.  */
          if (++rwlock->__data.__nr_readers == 0)

diff --git a/nptl/pthread_rwlock_tryrdlock.c b/nptl/pthread_rwlock_tryrdlock.c
index 446af05..df8863b 100644 (file)
--- a/nptl/pthread_rwlock_tryrdlock.c
+++ b/nptl/pthread_rwlock_tryrdlock.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -32,7 +32,7 @@ __pthread_rwlock_tryrdlock (rwlock)
 
   if (rwlock->__data.__writer == 0
       && (rwlock->__data.__nr_writers_queued == 0
-         || rwlock->__data.__flags == 0))
+         || PTHREAD_RWLOCK_PREFER_READER_P (rwlock)))
     {
       if (__builtin_expect (++rwlock->__data.__nr_readers == 0, 0))
        {