Refactored Chrono::highResolutionMSecs()

Improved precision

src/base/base.cmake

@@ -132,6 +132,7 @@ set(SOURCES_BASE
     src/base/net/tools/LineReader.cpp
     src/base/net/tools/NetBuffer.cpp
     src/base/tools/Arguments.cpp
+    src/base/tools/Chrono.cpp
     src/base/tools/cryptonote/BlockTemplate.cpp
     src/base/tools/cryptonote/crypto-ops-data.c
     src/base/tools/cryptonote/crypto-ops.c

src/base/tools/Chrono.cpp

@@ -0,0 +1,44 @@
+/* XMRig
+ * Copyright (c) 2018-2021 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2021 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Chrono.h"
+
+
+#ifdef XMRIG_OS_WIN
+#   include <Windows.h>
+#endif
+
+
+namespace xmrig {
+
+
+double Chrono::highResolutionMSecs()
+{
+#   ifdef XMRIG_OS_WIN
+    LARGE_INTEGER f, t;
+    QueryPerformanceFrequency(&f);
+    QueryPerformanceCounter(&t);
+    return static_cast<double>(t.QuadPart) * 1e3 / f.QuadPart;
+#   else
+    using namespace std::chrono;
+    return static_cast<uint64_t>(duration_cast<nanoseconds>(high_resolution_clock::now().time_since_epoch()).count()) / 1e6;
+#   endif
+}
+
+
+} /* namespace xmrig */

src/base/tools/Chrono.h

@@ -29,12 +29,7 @@ namespace xmrig {
 class Chrono
 {
 public:
-    static inline uint64_t highResolutionMSecs()
-    {
-        using namespace std::chrono;
-
-        return static_cast<uint64_t>(time_point_cast<milliseconds>(high_resolution_clock::now()).time_since_epoch().count());
-    }
+    static double highResolutionMSecs();
 
 
     static inline uint64_t steadyMSecs()