freebsd_network: Implement cv_destroy.

src/libs/compat/freebsd_network/condvar.cpp

@@ -3,9 +3,12 @@
  * Distributed under the terms of the MIT license.
  */
 
+extern "C" {
 #include <compat/sys/mutex.h>
-#include <compat/sys/condvar.h>
 #include <compat/sys/kernel.h>
+}
+
+#include <compat/sys/condvar.h>
 
 
 void
@@ -15,6 +18,14 @@ cv_init(struct cv* variable, const char* description)
 }
 
 
+void
+cv_destroy(struct cv* variable)
+{
+	variable->condition.NotifyAll();
+	// Nothing else to do.
+}
+
+
 void
 cv_signal(struct cv* variable)
 {