1 files changed, 61 insertions, 0 deletions
diff --git a/src/server/Load.hpp b/src/server/Load.hpp
new file mode 100644
index 00000000..2d806684
--- /dev/null
+++ b/src/server/Load.hpp
@@ -0,0 +1,61 @@
+/*
+  This file is part of Ingen.
+  Copyright 2007-2017 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or any later version.
+
+  Ingen 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_ENGINE_LOAD_HPP
+#define INGEN_ENGINE_LOAD_HPP
+
+#include <cmath>
+#include <cstdint>
+#include <limits>
+
+namespace ingen {
+namespace server {
+
+struct Load
+{
+	void update(uint64_t time, uint64_t available) {
+		const uint64_t load = time * 100 / available;
+		if (load < min) {
+			min     = load;
+			changed = true;
+		}
+		if (load > max) {
+			max     = load;
+			changed = true;
+		}
+		if (++n == 1) {
+			mean    = load;
+			changed = true;
+		} else {
+			const float a = mean + ((float)load - mean) / (float)++n;
+			if (a != mean) {
+				changed = floorf(a) != floorf(mean);
+				mean    = a;
+			}
+		}
+	}
+
+	uint64_t min     = std::numeric_limits<uint64_t>::max();
+	uint64_t max     = 0;
+	float    mean    = 0.0f;
+	uint64_t n       = 0;
+	bool     changed = false;
+};
+
+} // namespace server
+} // namespace ingen
+
+#endif // INGEN_ENGINE_LOAD_HPP