【新增】MNN依赖库

3rd/win/mnn/include/MNN/AutoTime.hpp

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+//
+//  AutoTime.hpp
+//  MNN
+//
+//  Created by MNN on 2018/07/27.
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#ifndef AutoTime_hpp
+#define AutoTime_hpp
+
+#include <stdint.h>
+#include <stdio.h>
+#include <MNN/MNNDefine.h>
+
+namespace MNN {
+
+class MNN_PUBLIC Timer {
+public:
+    Timer();
+    ~Timer();
+    Timer(const Timer&)  = delete;
+    Timer(const Timer&&) = delete;
+    Timer& operator=(const Timer&)  = delete;
+    Timer& operator=(const Timer&&) = delete;
+    
+    // reset timer
+    void reset();
+    // get duration (us) from init or latest reset.
+    uint64_t durationInUs();
+    
+protected:
+    uint64_t mLastResetTime;
+};
+
+/** time tracing util. prints duration between init and deinit. */
+class MNN_PUBLIC AutoTime : Timer {
+public:
+    AutoTime(int line, const char* func);
+    ~AutoTime();
+    AutoTime(const AutoTime&)  = delete;
+    AutoTime(const AutoTime&&) = delete;
+    AutoTime& operator=(const AutoTime&) = delete;
+    AutoTime& operator=(const AutoTime&&) = delete;
+
+private:
+    int mLine;
+    char* mName;
+};
+} // namespace MNN
+
+#ifdef MNN_OPEN_TIME_TRACE
+#define AUTOTIME MNN::AutoTime ___t(__LINE__, __func__)
+#else
+#define AUTOTIME
+#endif
+
+#endif /* AutoTime_hpp */