Implement PThreads barriers and barrier attributes.

1 files changed, 79 insertions, 0 deletions

diff --git a/lib/libthr/thread/thr_barrierattr.c b/lib/libthr/thread/thr_barrierattr.c
new file mode 100644
index 0000000..2fe3955
--- /dev/null
+++ b/lib/libthr/thread/thr_barrierattr.c
@@ -0,0 +1,79 @@
+/*-
+ * Copyright (c) 2004 Michael Telahun Makonnen <mtm@FreeBSD.Org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <pthread.h>
+#include <stdlib.h>
+
+#include "thr_private.h"
+
+__weak_reference(_pthread_barrierattr_destroy, pthread_barrierattr_destroy);
+__weak_reference(_pthread_barrierattr_init, pthread_barrierattr_init);
+__weak_reference(_pthread_barrierattr_getpshared,
+    pthread_barrierattr_getpshared);
+__weak_reference(_pthread_barrierattr_setpshared,
+    pthread_barrierattr_setpshared);
+
+int
+_pthread_barrierattr_destroy(pthread_barrierattr_t *attr)
+{
+	if (*attr == NULL)
+		return (EINVAL);
+	free(*attr);
+	*attr = NULL;
+	return (0);
+}
+
+int
+_pthread_barrierattr_init(pthread_barrierattr_t *attr)
+{
+	*attr =
+	    (pthread_barrierattr_t)malloc(sizeof(struct pthread_barrierattr));
+	if ((*attr) == NULL)
+		return (ENOMEM);
+	(*attr)->ba_pshared = PTHREAD_PROCESS_PRIVATE;
+	return (0);
+}
+
+int
+_pthread_barrierattr_getpshared(const pthread_barrierattr_t *attr, int *pshared)
+{
+	if (*attr == NULL)
+		return (EINVAL);
+	*pshared = (*attr)->ba_pshared;
+	return (0);
+}
+
+int
+_pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared)
+{
+	if (*attr == NULL || (pshared != PTHREAD_PROCESS_PRIVATE &&
+	    pshared != PTHREAD_PROCESS_SHARED))
+		return (EINVAL);
+	(*attr)->ba_pshared = pshared;
+	return (0);
+}