From a416ab17ecf9f2cb0f1e3f7bd645a8d1ce690ca2 Mon Sep 17 00:00:00 2001
From: rpj <rpj>
Date: Mon, 18 Feb 2002 03:16:52 +0000
Subject: Major reorganisation of source code; new routine and tests added.

---
 barrier_wait.c | 114 ---------------------------------------------------------
 1 file changed, 114 deletions(-)
 delete mode 100644 barrier_wait.c

(limited to 'barrier_wait.c')

diff --git a/barrier_wait.c b/barrier_wait.c
deleted file mode 100644
index 07ea32f..0000000
--- a/barrier_wait.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * barrier_wait.c
- *
- * Description:
- * This translation unit implements barrier primitives.
- *
- * --------------------------------------------------------------------------
- *
- *      Pthreads-win32 - POSIX Threads Library for Win32
- *      Copyright(C) 1998 John E. Bossom
- *      Copyright(C) 1999,2002 Pthreads-win32 contributors
- *
- *      Contact Email: rpj@ise.canberra.edu.au
- *
- *      The current list of contributors is contained
- *      in the file CONTRIBUTORS included with the source
- *      code distribution. The list can also be seen at the
- *      following World Wide Web location:
- *      http://sources.redhat.com/pthreads-win32/contributors.html
- *
- *      This 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 of the License, or (at your option) any later version.
- *
- *      This 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 this library in the file COPYING.LIB;
- *      if not, write to the Free Software Foundation, Inc.,
- *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-#include "pthread.h"
-#include "implement.h"
-
-
-int
-pthread_barrier_wait(pthread_barrier_t *barrier)
-{
-  int result;
-  int step;
-  pthread_barrier_t b;
-
-  if (barrier == NULL || *barrier == (pthread_barrier_t) PTW32_OBJECT_INVALID)
-    {
-      return EINVAL;
-    }
-
-  b = *barrier;
-  step = b->iStep;
-
-  if (0 == InterlockedDecrement((long *) &(b->nCurrentBarrierHeight)))
-    {
-      /* Must be done before posting the semaphore. */
-      b->nCurrentBarrierHeight = b->nInitialBarrierHeight;
-
-      /*
-       * There is no race condition between the semaphore wait and post
-       * because we are using two alternating semas and all threads have
-       * entered barrier_wait and checked nCurrentBarrierHeight before this
-       * barrier's sema can be posted. Any threads that have not quite
-       * entered sem_wait below when the multiple_post has completed
-       * will nevertheless continue through the semaphore (barrier)
-       * and will not be left stranded.
-       */
-      result = (b->nInitialBarrierHeight > 1
-                ? sem_post_multiple(&(b->semBarrierBreeched[step]),
-                                    b->nInitialBarrierHeight - 1)
-                : 0);
-    }
-  else
-    {
-      BOOL switchCancelState;
-      int oldCancelState;
-      pthread_t self = pthread_self();
-
-      /*
-       * This routine is not a cancelation point, so temporarily
-       * prevent sem_wait() from being one.
-       * PTHREAD_CANCEL_ASYNCHRONOUS threads can still be canceled.
-       */
-      switchCancelState = (self->cancelType == PTHREAD_CANCEL_DEFERRED &&
-                           0 == pthread_setcancelstate(PTHREAD_CANCEL_DISABLE,
-                                                       &oldCancelState));
-
-      result = sem_wait(&(b->semBarrierBreeched[step]));
-
-      if (switchCancelState)
-        {
-          (void) pthread_setcancelstate(oldCancelState, NULL);
-        }
-    }
-
-  /*
-   * The first thread across will be the PTHREAD_BARRIER_SERIAL_THREAD.
-   * This also sets up the alternate semaphore as the next barrier.
-   */
-  if (0 == result)
-    {
-      result = ((PTW32_INTERLOCKED_LONG) step ==
-                ptw32_interlocked_compare_exchange((PTW32_INTERLOCKED_LPLONG) &(b->iStep),
-                                                   (PTW32_INTERLOCKED_LONG) (1L - step),
-                                                   (PTW32_INTERLOCKED_LONG) step)
-                ? PTHREAD_BARRIER_SERIAL_THREAD
-                : 0);
-    }
-
-  return(result);
-}
-
-- 
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