Initial commit for GitHub migration based on spice2x-25-03-03

src/spice2x/util/time.cpp

@@ -0,0 +1,60 @@
+#include "time.h"
+
+#include <chrono>
+
+#include <windows.h>
+
+#include "util/logging.h"
+
+using namespace std::chrono;
+
+static bool PC_INITIALIZED = false;
+static double PC_FREQUENCY = 3000000000;
+static LARGE_INTEGER PC_START {};
+
+void init_performance_counter() {
+
+    // initialize performance counter
+    if (!PC_INITIALIZED) {
+
+        // query frequency
+        LARGE_INTEGER frequency {};
+        if (!QueryPerformanceFrequency(&frequency) || frequency.QuadPart == 0) {
+            log_warning("time", "unable to get performance counter frequency, defaulting to 3GHz");
+            PC_FREQUENCY = 3000000000;
+        } else {
+            log_info("time", "detected performance counter frequency: {}", frequency.QuadPart);
+            PC_FREQUENCY = static_cast<double>(frequency.QuadPart);
+        }
+
+        // get start frequency
+        QueryPerformanceCounter(&PC_START);
+
+        // mark as initialized
+        PC_INITIALIZED = true;
+    }
+}
+
+double get_performance_seconds() {
+    if (!PC_INITIALIZED) {
+      init_performance_counter();
+    }
+    LARGE_INTEGER time_now;
+    QueryPerformanceCounter(&time_now);
+    LONGLONG time_diff = time_now.QuadPart - PC_START.QuadPart;
+    return static_cast<double>(time_diff) / PC_FREQUENCY;
+}
+
+double get_performance_milliseconds() {
+    return get_performance_seconds() * 1000.0;
+}
+
+uint64_t get_system_seconds() {
+    auto sec = duration_cast<seconds>(system_clock::now().time_since_epoch());
+    return sec.count();
+}
+
+uint64_t get_system_milliseconds() {
+    auto ms = duration_cast<milliseconds>(system_clock::now().time_since_epoch());
+    return ms.count();
+}