mirror of https://github.com/alibaba/MNN.git
72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
//
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// FileLoader.hpp
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// MNN
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//
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// Created by MNN on 2019/07/04.
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// Copyright © 2018, Alibaba Group Holding Limited
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//
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#ifndef MNN_FileLoader_hpp
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#define MNN_FileLoader_hpp
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#include <vector>
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#include <mutex>
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#include <string>
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#include "core/AutoStorage.h"
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namespace MNN {
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class BaseLoader {
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public:
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BaseLoader() = default;
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virtual ~BaseLoader() = default;
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virtual bool read(char* buffer, int64_t size) = 0;
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};
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class MNN_PUBLIC FileLoader : public BaseLoader {
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public:
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FileLoader(const char* file, bool init = false);
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~FileLoader();
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bool read();
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static bool write(const char* filePath, std::pair<const void*, size_t> cacheInfo);
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bool valid() const {
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return mFile != nullptr;
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}
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inline size_t size() const {
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return mTotalSize;
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}
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inline std::string path() const {
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return mFilePath;
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}
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bool merge(AutoStorage<uint8_t>& buffer);
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int offset(int64_t offset);
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bool read(char* buffer, int64_t size);
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private:
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void _init();
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std::vector<std::pair<size_t, void*>> mBlocks;
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FILE* mFile = nullptr;
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static const int gCacheSize = 4096;
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size_t mTotalSize = 0;
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std::string mFilePath;
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bool mInited = false;
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};
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class MemoryLoader : public BaseLoader {
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public:
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MemoryLoader(unsigned char* ptr) : buffer_(ptr) {}
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virtual bool read(char *dst, int64_t size) override {
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::memcpy(dst, buffer_, size);
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buffer_ += size;
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return true;
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}
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private:
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unsigned char* buffer_ = nullptr;
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};
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} // namespace MNN
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#endif
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