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.

---
 ptw32_tkAssocCreate.c | 142 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 ptw32_tkAssocCreate.c

(limited to 'ptw32_tkAssocCreate.c')

diff --git a/ptw32_tkAssocCreate.c b/ptw32_tkAssocCreate.c
new file mode 100644
index 0000000..f6f6563
--- /dev/null
+++ b/ptw32_tkAssocCreate.c
@@ -0,0 +1,142 @@
+/*
+ * ptw32_tkAssocCreate.c
+ *
+ * Description:
+ * This translation unit implements routines which are private to
+ * the implementation and may be used throughout it.
+ *
+ * --------------------------------------------------------------------------
+ *
+ *      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
+ptw32_tkAssocCreate (ThreadKeyAssoc ** assocP,
+			pthread_t thread,
+			pthread_key_t key)
+     /*
+      * -------------------------------------------------------------------
+      * This routine creates an association that
+      * is unique for the given (thread,key) combination.The association 
+      * is referenced by both the thread and the key.
+      * This association allows us to determine what keys the
+      * current thread references and what threads a given key
+      * references.
+      * See the detailed description
+      * at the beginning of this file for further details.
+      *
+      * Notes:
+      *      1)      New associations are pushed to the beginning of the
+      * 	     chain so that the internal ptw32_selfThreadKey association
+      * 	     is always last, thus allowing selfThreadExit to
+      * 	     be implicitly called by pthread_exit last.
+      *
+      * Parameters:
+      * 	     assocP
+      * 		     address into which the association is returned.
+      * 	     thread
+      * 		     current running thread. If NULL, then association
+      * 		     is only added to the key. A NULL thread indicates
+      * 		     that the user called pthread_setspecific prior
+      * 		     to starting a thread. That's ok.
+      * 	     key
+      * 		     key on which to create an association.
+      * Returns:
+      *       0 	     - if successful,
+      *       ENOMEM	     - not enough memory to create assoc or other object
+      *       EINVAL	     - an internal error occurred
+      *       ENOSYS	     - an internal error occurred
+      * -------------------------------------------------------------------
+      */
+{
+  int result;
+  ThreadKeyAssoc *assoc;
+
+  /*
+   * Have to create an association and add it
+   * to both the key and the thread.
+   */
+  assoc = (ThreadKeyAssoc *) calloc (1, sizeof (*assoc));
+
+  if (assoc == NULL)
+    {
+      result = ENOMEM;
+      goto FAIL0;
+    }
+
+  /*
+   * Initialise only when used for the first time.
+   */
+  assoc->lock = PTHREAD_MUTEX_INITIALIZER;
+  assoc->thread = thread;
+  assoc->key = key;
+
+  /*
+   * Register assoc with key
+   */
+  if ((result = pthread_mutex_lock (&(key->threadsLock))) != 0)
+    {
+      goto FAIL2;
+    }
+
+  assoc->nextThread = (ThreadKeyAssoc *) key->threads;
+  key->threads = (void *) assoc;
+
+  pthread_mutex_unlock (&(key->threadsLock));
+
+  if (thread != NULL)
+    {
+      /*
+       * Register assoc with thread
+       */
+      assoc->nextKey = (ThreadKeyAssoc *) thread->keys;
+      thread->keys = (void *) assoc;
+    }
+
+  *assocP = assoc;
+
+  return (result);
+
+  /*
+   * -------------
+   * Failure Code
+   * -------------
+   */
+FAIL2:
+  pthread_mutex_destroy (&(assoc->lock));
+  free (assoc);
+
+FAIL0:
+
+  return (result);
+
+}				/* ptw32_tkAssocCreate */
-- 
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