1 files changed, 49 insertions, 0 deletions
diff --git a/src/sem.h b/src/sem.h
new file mode 100644
index 0000000..89f9d73
--- /dev/null
+++ b/src/sem.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            sem.h
+ *
+ *  Sat Oct  8 17:44:13 CEST 2005
+ *  Copyright  2005 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#pragma once
+
+#include <chrono>
+
+struct semaphore_private_t;
+
+class Semaphore
+{
+public:
+	Semaphore(std::size_t initial_count = 0);
+	~Semaphore();
+
+	void post();
+
+	//! Lock semaphore with timeout.
+	//! \returns true if the semaphore was locked, false on timeout.
+	bool wait(const std::chrono::milliseconds& timeout);
+
+	void wait();
+
+private:
+	struct semaphore_private_t *prv{nullptr};
+};