Starting to remove windows.h includes from things.

src/xenia/base/clock_win.cc

@@ -0,0 +1,41 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2015 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include "xenia/base/clock.h"
+
+#include "xenia/base/platform_win.h"
+
+namespace xe {
+
+uint64_t Clock::host_tick_frequency() {
+  static LARGE_INTEGER frequency = {0};
+  if (!frequency.QuadPart) {
+    QueryPerformanceFrequency(&frequency);
+  }
+  return frequency.QuadPart;
+}
+
+uint64_t Clock::QueryHostTickCount() {
+  LARGE_INTEGER counter;
+  uint64_t time = 0;
+  if (QueryPerformanceCounter(&counter)) {
+    time = counter.QuadPart;
+  }
+  return time;
+}
+
+uint64_t Clock::QueryHostSystemTime() {
+  FILETIME t;
+  GetSystemTimeAsFileTime(&t);
+  return (uint64_t(t.dwHighDateTime) << 32) | t.dwLowDateTime;
+}
+
+uint32_t Clock::QueryHostUptimeMillis() { return ::GetTickCount(); }
+
+}  // namespace xe