Initial community commit

Src/external_dependencies/openmpt-trunk/common/mptRandom.cpp

@@ -0,0 +1,62 @@
+/*
+ * mptRandom.cpp
+ * -------------
+ * Purpose: PRNG
+ * Notes  : (currently none)
+ * Authors: OpenMPT Devs
+ * The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
+ */
+
+#include "stdafx.h"
+
+#include "mptRandom.h"
+
+OPENMPT_NAMESPACE_BEGIN
+
+namespace mpt
+{
+
+#if defined(MODPLUG_TRACKER) && !defined(MPT_BUILD_WINESUPPORT)
+
+static mpt::random_device *g_rd = nullptr;
+static mpt::thread_safe_prng<mpt::default_prng> *g_global_prng = nullptr;
+
+void set_global_random_device(mpt::random_device *rd)
+{
+	g_rd = rd;
+}
+
+void set_global_prng(mpt::thread_safe_prng<mpt::default_prng> *prng)
+{
+	g_global_prng = prng;
+}
+
+mpt::random_device & global_random_device()
+{
+	return *g_rd;
+}
+
+mpt::thread_safe_prng<mpt::default_prng> & global_prng()
+{
+	return *g_global_prng;
+}
+
+#else
+
+mpt::random_device & global_random_device()
+{
+	static mpt::random_device g_rd;
+	return g_rd;
+}
+
+mpt::thread_safe_prng<mpt::default_prng> & global_prng()
+{
+	static mpt::thread_safe_prng<mpt::default_prng> g_global_prng(mpt::make_prng<mpt::default_prng>(global_random_device()));
+	return g_global_prng;
+}
+
+#endif // MODPLUG_TRACKER && !MPT_BUILD_WINESUPPORT
+
+} // namespace mpt
+
+OPENMPT_NAMESPACE_END