1 files changed, 135 insertions, 0 deletions
diff --git a/mit-pthreads/lib/libpthreadutil/pthread_atexit.c b/mit-pthreads/lib/libpthreadutil/pthread_atexit.c
new file mode 100755
index 00000000000..f244fbfb0c8
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+++ b/mit-pthreads/lib/libpthreadutil/pthread_atexit.c
@@ -0,0 +1,135 @@
+/* ==== pthread_atexit.c =====================================================
+ * Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *  This product includes software developed by Chris Provenzano.
+ * 4. The name of Chris Provenzano may not be used to endorse or promote 
+ *	  products derived from this software without specific prior written
+ *	  permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY 
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE.
+ *
+ * Description : Pthread attribute functions.
+ *
+ *  1.20 94/02/13 proven
+ *      -Started coding this file.
+ */
+
+#ifndef lint
+static const char rcsid[] = "$Id$";
+#endif
+
+#define PTHREAD_KERNEL
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "pthreadutil.h"
+
+static int pthread_atexit_inited = 0;
+static pthread_key_t pthread_atexit_key;
+static pthread_mutex_t pthread_atexit_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/* ==========================================================================
+ * pthread_atexit_done()
+ */
+static void pthread_atexit_done(void * arg) 
+{
+	pthread_atexit_t id, id_next;
+
+	for (id = arg; id; id = id_next) {
+		id_next = id->next;
+		id->rtn(id->arg);
+		free(id);
+	}
+}
+
+/* ==========================================================================
+ * pthread_atexit_add()
+ */
+int pthread_atexit_add(pthread_atexit_t *id, void (*rtn)(void *), void * arg)
+{
+	int ret;
+
+	if (ret = pthread_mutex_lock(&pthread_atexit_mutex)) {
+		return(ret);
+	}
+	if (!pthread_atexit_inited) {
+		if (ret = pthread_key_create(&pthread_atexit_key, pthread_atexit_done)){
+			pthread_mutex_unlock(&pthread_atexit_mutex);
+			return(ret);
+		}
+		pthread_atexit_inited++;
+	}
+	pthread_mutex_unlock(&pthread_atexit_mutex);
+	
+	if ((*id) = (pthread_atexit_t)malloc(sizeof(struct pthread_atexit))) {
+		if ((*id)->next = pthread_getspecific(pthread_atexit_key)) {
+			(*id)->next->prev = (*id);
+		}
+		pthread_setspecific(pthread_atexit_key, (void *)*id);
+		(*id)->prev = NULL;
+		(*id)->rtn = rtn;
+		(*id)->arg = arg;
+		return(OK);
+	}
+	return(ENOMEM);
+}
+
+/* ==========================================================================
+ * pthread_atexit_remove()
+ */
+int pthread_atexit_remove(pthread_atexit_t * id, int execute)
+{
+	pthread_atexit_t old;
+
+	if (old = pthread_getspecific(pthread_atexit_key)) {
+		if (old == *id) {
+			old = old->next;
+			old->prev = NULL;
+			pthread_setspecific(pthread_atexit_key, old);
+		} else {
+			if ((*id)->next) {
+				(*id)->next->prev = (*id)->prev;
+			}
+			(*id)->prev->next = (*id)->next;
+		}
+		if (execute) {
+			(*id)->rtn((*id)->arg);
+		}
+		free((*id));
+		return(OK);
+	}
+	return(EINVAL);
+}
+
+/* ==========================================================================
+ * A few non void functions that are often used as void functions
+ */
+void fflush_nrv(void * fp) { fflush((FILE *)fp); }
+void fclose_nrv(void * fp) { fclose((FILE *)fp); }
+
+void pthread_attr_destroy_nrv(void * attr) 
+{ 
+	pthread_attr_destroy((pthread_attr_t *)attr); 
+}