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authorMax Kellermann <max@duempel.org>2013-01-07 20:50:48 +0100
committerMax Kellermann <max@duempel.org>2013-01-07 21:27:51 +0100
commit5b8b7d14127a5ea9ce8f0301c92267f86eeab85a (patch)
tree954e81e1ab93b24ab59bde3fe08489109e4b4964 /src/util/LazyRandomEngine.cxx
parent53e5139b9940bd51af5ad6bc123331a94af5f462 (diff)
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util/LazyRandomEngine: lazy wrapper for std::mt19937
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-rw-r--r--src/util/LazyRandomEngine.cxx31
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diff --git a/src/util/LazyRandomEngine.cxx b/src/util/LazyRandomEngine.cxx
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+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "LazyRandomEngine.hxx"
+
+void
+LazyRandomEngine::AutoCreate()
+{
+ if (engine != nullptr)
+ return;
+
+ std::random_device rd;
+ engine = new std::mt19937(rd());
+}