DrivenEngine channels are now shared_ptr

luprex/core/cpp/driver-mingw.cpp

@@ -12,6 +12,33 @@
 
 
 
+class monotonic_clock {
+public:
+    double freq_;
+
+    monotonic_clock() {
+        LARGE_INTEGER x;
+        BOOL status = QueryPerformanceFrequency(&x);
+        assert(status != 0);
+        freq_ = 1.0 / double(x.QuadPart);
+    }
+
+    double get() {
+        LARGE_INTEGER x;
+        BOOL status = QueryPerformanceCounter(&x);
+        assert(status != 0);
+        return double(x.QuadPart) * freq_;
+    }
+);
+#endif
+
+static monotonic_clock monoclock;
+
+namespace util {
+    double profiling_clock() {
+        return monoclock.get();
+    }
+}
 
 class Driver {
 public: