Activation improvement, more robust timer.

src/http_stream.cpp

@@ -329,3 +329,59 @@ image image_data_augmentation(IplImage* ipl, int w, int h,
 
 
 #endif    // OPENCV
+
+#if __cplusplus >= 201103L || _MSC_VER >= 1900  // C++11
+
+#include <chrono>
+#include <iostream>
+
+static std::chrono::steady_clock::time_point steady_start, steady_end;
+static double total_time;
+
+double get_time_point() {
+    std::chrono::steady_clock::time_point current_time = std::chrono::steady_clock::now();
+    //uint64_t now = std::chrono::duration_cast<std::chrono::milliseconds>(current_time.time_since_epoch()).count();
+    return std::chrono::duration_cast<std::chrono::microseconds>(current_time.time_since_epoch()).count();
+}
+
+void start_timer() {
+    steady_start = std::chrono::steady_clock::now();
+}
+
+void stop_timer() {
+    steady_end = std::chrono::steady_clock::now();
+}
+
+double get_time() {
+    double took_time = std::chrono::duration<double>(steady_end - steady_start).count();
+    total_time += took_time;
+    return took_time;
+}
+
+void stop_timer_and_show() {
+    stop_timer();
+    std::cout << " " << get_time()*1000 << " msec" << std::endl;
+}
+
+void stop_timer_and_show_name(char *name) {
+    std::cout << " " << name;
+    stop_timer_and_show();
+}
+
+void show_total_time() {
+    std::cout << " Total: " << total_time * 1000 << " msec" << std::endl;
+}
+
+#else // C++11
+#include <iostream>
+
+double get_time_point() { return 0; }
+void start_timer() {}
+void stop_timer() {}
+double get_time() { return 0; }
+void stop_timer_and_show() {
+    std::cout << " stop_timer_and_show() isn't implemented " << std::endl;
+}
+void stop_timer_and_show_name(char *name) { stop_timer_and_show(); }
+void total_time() {}
+#endif // C++11