1 files changed, 60 insertions, 0 deletions

diff --git a/lib/libthr/thread/thr_concurrency.c b/lib/libthr/thread/thr_concurrency.c
new file mode 100644
index 000000000000..9f2315b06640
--- /dev/null
+++ b/lib/libthr/thread/thr_concurrency.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2003 Sergey Osokin <osa@FreeBSD.org.ru>.
+ * 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 Sergey Osokin.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY SERGEY OSOKIN 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 <errno.h>
+
+static int current_concurrency = 0;
+
+__weak_reference(_pthread_getconcurrency, pthread_getconcurrency);
+__weak_reference(_pthread_setconcurrency, pthread_setconcurrency);
+
+int
+_pthread_getconcurrency(void)
+{
+	return current_concurrency;
+}
+
+int
+_pthread_setconcurrency(int new_level)
+{
+	int ret;
+
+	if (new_level < 0) {
+		ret = EINVAL;
+	} else {
+		current_concurrency = new_level;
+		ret = 0;
+	}
+	return (ret);
+}