Create cpu_speed.c

system/cpu_speed.c

@@ -0,0 +1,30 @@
+#include <windows.h>
+#include <wchar.h>
+
+int wmain(void) {
+
+    DWORD BufSize = MAX_PATH;
+    DWORD mhz = MAX_PATH;
+    HKEY key;
+
+    long r = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
+        L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0", 0, KEY_READ, &key);
+
+    if (r != ERROR_SUCCESS) {
+    
+        wprintf(L"RegOpenKeyExW() failed %ld", GetLastError());
+        return 1;
+    }
+
+    r = RegQueryValueExW(key, L"~MHz", NULL, NULL, (LPBYTE) &mhz, &BufSize);
+
+    if (r != ERROR_SUCCESS) {
+    
+        wprintf(L"RegQueryValueExW() failed %ld", GetLastError());
+        return 1;
+    }
+
+    wprintf(L"CPU speed: %lu MHz\n", mhz);
+    
+    return 0;
+}