aboutsummaryrefslogtreecommitdiffstats
path: root/src/libs/3rdparty/winpty/src/shared/TimeMeasurement.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/libs/3rdparty/winpty/src/shared/TimeMeasurement.h')
-rw-r--r--src/libs/3rdparty/winpty/src/shared/TimeMeasurement.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/src/libs/3rdparty/winpty/src/shared/TimeMeasurement.h b/src/libs/3rdparty/winpty/src/shared/TimeMeasurement.h
new file mode 100644
index 0000000000..716a027fcb
--- /dev/null
+++ b/src/libs/3rdparty/winpty/src/shared/TimeMeasurement.h
@@ -0,0 +1,63 @@
+// Copyright (c) 2015 Ryan Prichard
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+
+// Convenience header library for using the high-resolution performance counter
+// to measure how long some process takes.
+
+#ifndef TIME_MEASUREMENT_H
+#define TIME_MEASUREMENT_H
+
+#include <windows.h>
+#include <assert.h>
+#include <stdint.h>
+
+class TimeMeasurement {
+public:
+ TimeMeasurement() {
+ static double freq = static_cast<double>(getFrequency());
+ m_freq = freq;
+ m_start = value();
+ }
+
+ double elapsed() {
+ uint64_t elapsedTicks = value() - m_start;
+ return static_cast<double>(elapsedTicks) / m_freq;
+ }
+
+private:
+ uint64_t getFrequency() {
+ LARGE_INTEGER freq;
+ BOOL success = QueryPerformanceFrequency(&freq);
+ assert(success && "QueryPerformanceFrequency failed");
+ return freq.QuadPart;
+ }
+
+ uint64_t value() {
+ LARGE_INTEGER ret;
+ BOOL success = QueryPerformanceCounter(&ret);
+ assert(success && "QueryPerformanceCounter failed");
+ return ret.QuadPart;
+ }
+
+ uint64_t m_start;
+ double m_freq;
+};
+
+#endif // TIME_MEASUREMENT_H