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.

---
 pthread_key_create.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 pthread_key_create.c

(limited to 'pthread_key_create.c')

diff --git a/pthread_key_create.c b/pthread_key_create.c
new file mode 100644
index 0000000..8ec46d7
--- /dev/null
+++ b/pthread_key_create.c
@@ -0,0 +1,108 @@
+/*
+ * pthread_key_create.c
+ *
+ * Description:
+ * POSIX thread functions which implement thread-specific data (TSD).
+ *
+ * --------------------------------------------------------------------------
+ *
+ *      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"
+
+
+/* TLS_OUT_OF_INDEXES not defined on WinCE */
+#ifndef TLS_OUT_OF_INDEXES
+#define TLS_OUT_OF_INDEXES 0xffffffff
+#endif
+
+int
+pthread_key_create (pthread_key_t * key, void (*destructor) (void *))
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      This function creates a thread-specific data key visible
+      *      to all threads. All existing and new threads have a value
+      *      NULL for key until set using pthread_setspecific. When any
+      *      thread with a non-NULL value for key terminates, 'destructor'
+      *      is called with key's current value for that thread.
+      *
+      * PARAMETERS
+      *      key
+      *              pointer to an instance of pthread_key_t
+      *
+      *
+      * DESCRIPTION
+      *      This function creates a thread-specific data key visible
+      *      to all threads. All existing and new threads have a value
+      *      NULL for key until set using pthread_setspecific. When any
+      *      thread with a non-NULL value for key terminates, 'destructor'
+      *      is called with key's current value for that thread.
+      *
+      * RESULTS
+      *              0               successfully created semaphore,
+      *              EAGAIN          insufficient resources or PTHREAD_KEYS_MAX
+      *                              exceeded,
+      *              ENOMEM          insufficient memory to create the key,
+      *
+      * ------------------------------------------------------
+      */
+{
+  int result = 0;
+  pthread_key_t newkey;
+
+  if ((newkey = (pthread_key_t) calloc (1, sizeof (*newkey))) == NULL)
+    {
+      result = ENOMEM;
+    }
+  else if ((newkey->key = TlsAlloc()) == TLS_OUT_OF_INDEXES)
+    {
+      result = EAGAIN;
+
+      free (newkey);
+      newkey = NULL;
+    }
+  else if (destructor != NULL)
+    {
+      /*
+       * Have to manage associations between thread and key;
+       * Therefore, need a lock that allows multiple threads
+       * to gain exclusive access to the key->threads list.
+       *
+       * The mutex will only be created when it is first locked.
+       */
+      newkey->threadsLock = PTHREAD_MUTEX_INITIALIZER;
+      newkey->destructor = destructor;
+    }
+
+  *key = newkey;
+
+  return (result);
+}
-- 
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