Add pthread barrier support.

Implementation and documentation for:
 - pthread_barrier_init()
 - pthread_barrier_destroy()
 - pthread_barrier_wait()
 - pthread_barrierattr_init()
 - pthread_barrierattr_destroy()
 - pthread_barrierattr_getpshared()
 - pthread_barrierattr_setpshared()

Currently only private barriers are supported.

Okay guenther@.

1 files changed, 76 insertions, 0 deletions

diff --git a/lib/librthread/rthread_barrier_attr.c b/lib/librthread/rthread_barrier_attr.c
new file mode 100644
index 00000000000..54f44ed232c
--- /dev/null
+++ b/lib/librthread/rthread_barrier_attr.c
@@ -0,0 +1,76 @@
+/*	$OpenBSD: rthread_barrier_attr.c,v 1.1 2012/04/11 10:18:46 pirofti Exp $	*/
+/*
+ * Copyright (c) 2012 Paul Irofti <pirofti@openbsd.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include <pthread.h>
+
+#include "rthread.h"
+
+int
+pthread_barrierattr_init(pthread_barrierattr_t *attr)
+{
+	if (attr == NULL) {
+		return EINVAL;
+	}
+
+	*attr = calloc(1, sizeof **attr);
+	if (*attr == NULL) {
+		return ENOMEM;
+	}
+
+	(*attr)->pshared = PTHREAD_PROCESS_PRIVATE;
+
+	return 0;
+}
+
+int
+pthread_barrierattr_destroy(pthread_barrierattr_t *attr)
+{
+	if (attr == NULL || *attr == NULL) {
+		return EINVAL;
+	}
+	free(*attr);
+	return 0;
+}
+
+int
+pthread_barrierattr_getpshared(pthread_barrierattr_t *attr, int *pshared)
+{
+	if (attr == NULL || *attr == NULL) {
+		return EINVAL;
+	}
+	*pshared = (*attr)->pshared;
+	return 0;
+}
+
+int
+pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared)
+{
+	if (attr == NULL || *attr == NULL) {
+		return EINVAL;
+	}
+
+	if (pshared != PTHREAD_PROCESS_PRIVATE) {
+		return ENOTSUP;
+	}
+
+	(*attr)->pshared = pshared;
+
+	return 0;
+}