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authorJakub Jelinek <jakub@redhat.com>2007-07-31 13:33:18 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-31 13:33:18 +0000
commit32c075e1f01849e161724bbd400ba77244e482cc (patch)
tree5f083a3f352104f32bb6c902d57fa3f294bd8d4d /nptl/pthread_rwlock_wrlock.c
parentd6220e9ee38c1c9285221b023346201ec5f511b3 (diff)
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Diffstat (limited to 'nptl/pthread_rwlock_wrlock.c')
-rw-r--r--nptl/pthread_rwlock_wrlock.c87
1 files changed, 0 insertions, 87 deletions
diff --git a/nptl/pthread_rwlock_wrlock.c b/nptl/pthread_rwlock_wrlock.c
deleted file mode 100644
index 822aeed79c..0000000000
--- a/nptl/pthread_rwlock_wrlock.c
+++ /dev/null
@@ -1,87 +0,0 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
-
-   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 <pthread.h>
-#include <pthreadP.h>
-
-
-/* Acquire write lock for RWLOCK.  */
-int
-__pthread_rwlock_wrlock (rwlock)
-     pthread_rwlock_t *rwlock;
-{
-  int result = 0;
-
-  /* Make sure we are along.  */
-  lll_mutex_lock (rwlock->__data.__lock);
-
-  while (1)
-    {
-      /* Get the rwlock if there is no writer and no reader.  */
-      if (rwlock->__data.__writer == 0 && rwlock->__data.__nr_readers == 0)
-	{
-	  /* Mark self as writer.  */
-	  rwlock->__data.__writer = THREAD_GETMEM (THREAD_SELF, tid);
-	  break;
-	}
-
-      /* Make sure we are not holding the rwlock as a writer.  This is
-	 a deadlock situation we recognize and report.  */
-      if (__builtin_expect (rwlock->__data.__writer
-			    == THREAD_GETMEM (THREAD_SELF, tid), 0))
-	{
-	  result = EDEADLK;
-	  break;
-	}
-
-      /* Remember that we are a writer.  */
-      if (++rwlock->__data.__nr_writers_queued == 0)
-	{
-	  /* Overflow on number of queued writers.  */
-	  --rwlock->__data.__nr_writers_queued;
-	  result = EAGAIN;
-	  break;
-	}
-
-      int waitval = rwlock->__data.__writer_wakeup;
-
-      /* Free the lock.  */
-      lll_mutex_unlock (rwlock->__data.__lock);
-
-      /* Wait for the writer or reader(s) to finish.  */
-      lll_futex_wait (&rwlock->__data.__writer_wakeup, waitval);
-
-      /* Get the lock.  */
-      lll_mutex_lock (rwlock->__data.__lock);
-
-      /* To start over again, remove the thread from the writer list.  */
-      --rwlock->__data.__nr_writers_queued;
-    }
-
-  /* We are done, free the lock.  */
-  lll_mutex_unlock (rwlock->__data.__lock);
-
-  return result;
-}
-
-weak_alias (__pthread_rwlock_wrlock, pthread_rwlock_wrlock)
-strong_alias (__pthread_rwlock_wrlock, __pthread_rwlock_wrlock_internal)