Backport: Use <chrono> for platform-independent timing and remove ElapsedTime. Also use #if for painting measurement as there are 7 sections of code to enable.

Backport of changeset 6741:af5d9064c25c.

1 files changed, 35 insertions, 0 deletions

diff --git a/src/ElapsedPeriod.h b/src/ElapsedPeriod.h
new file mode 100644
index 000000000..bbbc6d7fb
--- /dev/null
+++ b/src/ElapsedPeriod.h
@@ -0,0 +1,35 @@
+// Scintilla source code edit control
+/** @file ElapsedPeriod.h
+ ** Encapsulate C++ <chrono> to simplify use.
+ **/
+// Copyright 2018 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#ifndef ELAPSEDPERIOD_H
+#define ELAPSEDPERIOD_H
+
+namespace Scintilla {
+
+// Simplified access to high precision timing.
+class ElapsedPeriod {
+	std::chrono::high_resolution_clock::time_point tp;
+public:
+	/// Capture the moment
+	ElapsedPeriod() : tp(std::chrono::high_resolution_clock::now()) {
+	}
+	/// Return duration as floating point seconds
+	double Duration(bool reset=false) {
+		std::chrono::high_resolution_clock::time_point tpNow =
+			std::chrono::high_resolution_clock::now();
+		const std::chrono::duration<double> stylingDuration =
+			std::chrono::duration_cast<std::chrono::duration<double>>(tpNow - tp);
+		if (reset) {
+			tp = tpNow;
+		}
+		return stylingDuration.count();
+	}
+};
+
+}
+
+#endif