CPU usage retrieval.

2025-03-20 07:40:02 +08:00 · 2019-02-21 21:59:02 +01:00
parent c8fb3f24cc
commit 9f4f5bcb63
6 changed files with 130 additions and 0 deletions
@@ -0,0 +1,59 @@
+#include "TracySysTime.hpp"
+
+#ifdef TRACY_HAS_SYSTIME
+
+#  ifdef _WIN32
+#    include <windows.h>
+#  endif
+
+namespace tracy
+{
+
+#  ifdef _WIN32
+
+static inline uint64_t ConvertTime( const FILETIME& t )
+{
+    return ( uint64_t( t.dwHighDateTime ) << 32 ) | uint64_t( t.dwLowDateTime );
+}
+
+SysTime::SysTime()
+{
+    FILETIME idleTime;
+    FILETIME kernelTime;
+    FILETIME userTime;
+
+    GetSystemTimes( &idleTime, &kernelTime, &userTime );
+
+    idle = ConvertTime( idleTime );
+    const auto kernel = ConvertTime( kernelTime );
+    const auto user = ConvertTime( userTime );
+    used = kernel + user;
+}
+
+float SysTime::Get()
+{
+    FILETIME idleTime;
+    FILETIME kernelTime;
+    FILETIME userTime;
+
+    GetSystemTimes( &idleTime, &kernelTime, &userTime );
+
+    const auto newIdle = ConvertTime( idleTime );
+    const auto kernel = ConvertTime( kernelTime );
+    const auto user = ConvertTime( userTime );
+    const auto newUsed = kernel + user;
+
+    const auto diffIdle = newIdle - idle;
+    const auto diffUsed = newUsed - used;
+
+    idle = newIdle;
+    used = newUsed;
+
+    return diffUsed == 0 ? 0 : ( diffUsed - diffIdle ) * 100.f / diffUsed;
+}
+
+#  endif
+
+}
+
+#endif