From 075d17f8ada47e990fe94606c3d21df409223465 Mon Sep 17 00:00:00 2001
From: Stefan Boberg <stefan@boberg.org>
Date: Tue, 2 May 2023 10:01:47 +0200
Subject: moved source directories into `/src` (#264)

* moved source directories into `/src`
* updated bundle.lua for new `src` path
* moved some docs, icon
* removed old test trees
---
 src/zencore/timer.cpp | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 src/zencore/timer.cpp

(limited to 'src/zencore/timer.cpp')

diff --git a/src/zencore/timer.cpp b/src/zencore/timer.cpp
new file mode 100644
index 000000000..1655e912d
--- /dev/null
+++ b/src/zencore/timer.cpp
@@ -0,0 +1,105 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#include <zencore/thread.h>
+#include <zencore/timer.h>
+
+#include <zencore/testing.h>
+
+#if ZEN_PLATFORM_WINDOWS
+#	include <zencore/windows.h>
+#elif ZEN_PLATFORM_LINUX
+#	include <time.h>
+#	include <unistd.h>
+#endif
+
+namespace zen {
+
+uint64_t
+GetHifreqTimerValue()
+{
+	uint64_t Timestamp;
+
+#if ZEN_PLATFORM_WINDOWS
+	LARGE_INTEGER li;
+	QueryPerformanceCounter(&li);
+
+	Timestamp = li.QuadPart;
+#else
+	struct timespec ts;
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+	Timestamp = (uint64_t(ts.tv_sec) * 1000000ull) + (uint64_t(ts.tv_nsec) / 1000ull);
+#endif
+
+	return Timestamp;
+}
+
+uint64_t
+InternalGetHifreqTimerFrequency()
+{
+#if ZEN_PLATFORM_WINDOWS
+	LARGE_INTEGER li;
+	QueryPerformanceFrequency(&li);
+
+	return li.QuadPart;
+#else
+	return 1000000ull;
+#endif
+}
+
+uint64_t			QpcFreq	  = InternalGetHifreqTimerFrequency();
+static const double QpcFactor = 1.0 / InternalGetHifreqTimerFrequency();
+
+uint64_t
+GetHifreqTimerFrequency()
+{
+	return QpcFreq;
+}
+
+double
+GetHifreqTimerToSeconds()
+{
+	return QpcFactor;
+}
+
+uint64_t
+GetHifreqTimerFrequencySafe()
+{
+	if (!QpcFreq)
+	{
+		QpcFreq = InternalGetHifreqTimerFrequency();
+	}
+
+	return QpcFreq;
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+uint64_t detail::g_LofreqTimerValue = GetHifreqTimerValue();
+
+void
+UpdateLofreqTimerValue()
+{
+	detail::g_LofreqTimerValue = GetHifreqTimerValue();
+}
+
+uint64_t
+GetLofreqTimerFrequency()
+{
+	return GetHifreqTimerFrequencySafe();
+}
+
+//////////////////////////////////////////////////////////////////////////
+//
+// Testing related code follows...
+//
+
+#if ZEN_WITH_TESTS
+
+void
+timer_forcelink()
+{
+}
+
+#endif
+
+}  // namespace zen
-- 
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