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authorrpj <rpj>2002-02-18 03:16:52 +0000
committerrpj <rpj>2002-02-18 03:16:52 +0000
commita416ab17ecf9f2cb0f1e3f7bd645a8d1ce690ca2 (patch)
tree72f776cd64e48824a5578ff7a523bc69097143b4 /ptw32_tkAssocCreate.c
parente6f1797e9e9925ae7f9dda54806ef8f52ae3ed07 (diff)
Major reorganisation of source code; new routine and tests added.
Diffstat (limited to 'ptw32_tkAssocCreate.c')
-rw-r--r--ptw32_tkAssocCreate.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/ptw32_tkAssocCreate.c b/ptw32_tkAssocCreate.c
new file mode 100644
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+++ b/ptw32_tkAssocCreate.c
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+/*
+ * 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 */