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nptl/pthread_barrier_wait.c

@@ -1,77 +0,0 @@
-/* Copyright (C) 2003, 2004 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 <pthreadP.h>
-
-
-/* Wait on barrier.  */
-int
-pthread_barrier_wait (barrier)
-     pthread_barrier_t *barrier;
-{
-  struct pthread_barrier *ibarrier = (struct pthread_barrier *) barrier;
-  int result = 0;
-
-  /* Make sure we are alone.  */
-  lll_lock (ibarrier->lock);
-
-  /* One more arrival.  */
-  --ibarrier->left;
-
-  /* Are these all?  */
-  if (ibarrier->left == 0)
-    {
-      /* Yes. Increment the event counter to avoid invalid wake-ups and
-	 tell the current waiters that it is their turn.  */
-      ++ibarrier->curr_event;
-
-      /* Wake up everybody.  */
-      lll_futex_wake (&ibarrier->curr_event, INT_MAX);
-
-      /* This is the thread which finished the serialization.  */
-      result = PTHREAD_BARRIER_SERIAL_THREAD;
-    }
-  else
-    {
-      /* The number of the event we are waiting for.  The barrier's event
-	 number must be bumped before we continue.  */
-      unsigned int event = ibarrier->curr_event;
-
-      /* Before suspending, make the barrier available to others.  */
-      lll_unlock (ibarrier->lock);
-
-      /* Wait for the event counter of the barrier to change.  */
-      do
-	lll_futex_wait (&ibarrier->curr_event, event);
-      while (event == ibarrier->curr_event);
-    }
-
-  /* Make sure the init_count is stored locally or in a register.  */
-  unsigned int init_count = ibarrier->init_count;
-
-  /* If this was the last woken thread, unlock.  */
-  if (atomic_increment_val (&ibarrier->left) == init_count)
-    /* We are done.  */
-    lll_unlock (ibarrier->lock);
-
-  return result;
-}