1 files changed, 65 insertions, 0 deletions
diff --git a/external/unbound/compat/arc4_lock.c b/external/unbound/compat/arc4_lock.c
new file mode 100644
index 000000000..ce8bb4168
--- /dev/null
+++ b/external/unbound/compat/arc4_lock.c
@@ -0,0 +1,65 @@
+/* arc4_lock.c - global lock for arc4random
+*
+ * Copyright (c) 2014, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 
+ * 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.
+ * 
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+ * HOLDER 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.
+ */
+#include "config.h"
+#define LOCKRET(func) func
+#include "util/locks.h"
+
+void _ARC4_LOCK(void);
+void _ARC4_UNLOCK(void);
+
+#ifdef THREADS_DISABLED
+void _ARC4_LOCK(void)
+{
+}
+
+void _ARC4_UNLOCK(void)
+{
+}
+#else /* !THREADS_DISABLED */
+
+static lock_quick_t arc4lock;
+static int arc4lockinit = 0;
+
+void _ARC4_LOCK(void)
+{
+	if(!arc4lockinit)
+		lock_quick_init(&arc4lock);
+	lock_quick_lock(&arc4lock);
+}
+
+void _ARC4_UNLOCK(void)
+{
+	lock_quick_unlock(&arc4lock);
+}
+#endif /* THREADS_DISABLED */