New win32 platform function: GetCPUInfo

Fixes #1644

src/platform_win32.cc

@@ -215,7 +215,66 @@ int Platform::GetMemory(size_t *rss, size_t *vsize) {
 }
 
 int Platform::GetCPUInfo(Local<Array> *cpus) {
-  return -1;
+
+  HandleScope scope;
+  *cpus = Array::New();
+
+  for (int i = 0; i < 32; i++) {
+
+    char key[128] = "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\";
+    char processor_number[32];
+    itoa(i, processor_number, 10);
+    strncat(key, processor_number, 2);
+
+    HKEY processor_key = NULL;
+
+    DWORD cpu_speed = 0;
+    DWORD cpu_speed_length = sizeof(cpu_speed);
+
+    char cpu_brand[256];
+    DWORD cpu_brand_length = sizeof(cpu_brand);
+
+    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_QUERY_VALUE,
+        &processor_key) != ERROR_SUCCESS) {
+      if (i == 0) {
+        winapi_perror("RegOpenKeyEx");
+        return -1;
+      }
+
+      continue;
+    }
+
+    if (RegQueryValueEx(processor_key, "~MHz", NULL, NULL,
+                        (LPBYTE)&cpu_speed, &cpu_speed_length)
+                        != ERROR_SUCCESS) {
+      winapi_perror("RegQueryValueEx");
+      return -1;
+    }
+
+    if (RegQueryValueEx(processor_key, "ProcessorNameString", NULL, NULL,
+                        (LPBYTE)&cpu_brand, &cpu_brand_length)
+                        != ERROR_SUCCESS) {
+      winapi_perror("RegQueryValueEx");
+      return -1;
+    }
+
+    RegCloseKey(processor_key);
+
+    Local<Object> times_info = Object::New(); // FIXME - find times on windows
+    times_info->Set(String::New("user"), Integer::New(0));
+    times_info->Set(String::New("nice"), Integer::New(0));
+    times_info->Set(String::New("sys"), Integer::New(0));
+    times_info->Set(String::New("idle"), Integer::New(0));
+    times_info->Set(String::New("irq"), Integer::New(0));
+
+    Local<Object> cpu_info = Object::New();
+    cpu_info->Set(String::New("model"), String::New(cpu_brand));
+    cpu_info->Set(String::New("speed"), Integer::New(cpu_speed));
+    cpu_info->Set(String::New("times"), times_info);
+    (*cpus)->Set(i,cpu_info);
+  }
+
+  return 0;
 }