1 files changed, 58 insertions, 0 deletions
diff --git a/libcult/cult/sched/lock.hxx b/libcult/cult/sched/lock.hxx
new file mode 100644
index 0000000..1ecf3fb
--- /dev/null
+++ b/libcult/cult/sched/lock.hxx
@@ -0,0 +1,58 @@
+// file      : cult/sched/lock.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef CULT_SCHED_LOCK_HXX
+#define CULT_SCHED_LOCK_HXX
+
+#include <cult/types/fundamental.hxx>
+
+namespace Cult
+{
+  namespace Sched
+  {
+    class Lock: public NonCopyable
+    {
+    public:
+      ~Lock ()
+      {
+        unlock ();
+      }
+
+      template <typename X>
+      Lock (X& x)
+          : x_ (reinterpret_cast<Void*>(&x)),
+            unlock_ (&unlock<X>),
+            locked_ (true)
+      {
+        x.lock ();
+      }
+
+      Void
+      unlock ()
+      {
+        if (locked_)
+        {
+          unlock_ (x_);
+          locked_ = false;
+        }
+      }
+
+    private:
+      template <typename X>
+      static Void
+      unlock (Void* p)
+      {
+        reinterpret_cast<X*> (p)->unlock ();
+      }
+
+    private:
+      Void* x_;
+      Void (*unlock_) (Void*);
+      Boolean locked_;
+    };
+  }
+}
+
+#endif  // CULT_SCHED_LOCK_HXX