问MapViewOfFile返回ERROR_INVALID_PARAMETER Windows-10(通用Windows平台)

EN

#include <windows.h>
#include <string>
#include <iostream>

// you may combine access in the same was as pageFileAccessMode allows
enum class AccessMode {
    READ,
    READ_WRITE
};

DWORD openFileForMapping(AccessMode accessMode, std::wstring const & filepath, HANDLE * fileHandler, std::size_t & fileSize, HANDLE * fileMappingHandler) {
    DWORD fileAccessRegularMode;
    DWORD fileAccessSharedMode;
    DWORD pageFileAccessMode;
    HANDLE localFileHandler;
    HANDLE localFileMappingHandler;

    switch (accessMode) {
    case AccessMode::READ:
        fileAccessRegularMode = GENERIC_READ;
        fileAccessSharedMode = FILE_SHARE_READ;
        pageFileAccessMode = PAGE_READONLY;
        break;
    case AccessMode::READ_WRITE:
        fileAccessRegularMode = GENERIC_READ | GENERIC_WRITE;
        fileAccessSharedMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
        pageFileAccessMode = PAGE_READWRITE;
        break;
    }

    // parameters MUST be initialized with zero and size
    CREATEFILE2_EXTENDED_PARAMETERS createFile2ParametersEx{ 0 };
    createFile2ParametersEx.dwSize = sizeof(CREATEFILE2_EXTENDED_PARAMETERS);
    createFile2ParametersEx.dwFileAttributes = fileAccessRegularMode;
    // parameters options, depends on your requirements
    createFile2ParametersEx.dwFileFlags = FILE_FLAG_NO_BUFFERING;
    createFile2ParametersEx.lpSecurityAttributes = NULL;
    createFile2ParametersEx.hTemplateFile = NULL;

    localFileHandler = CreateFile2(filepath.c_str(), fileAccessRegularMode, fileAccessSharedMode, OPEN_EXISTING, &createFile2ParametersEx);
    if (localFileHandler == INVALID_HANDLE_VALUE) {
        return GetLastError();
    }

    LARGE_INTEGER msSize;
    if (GetFileSizeEx(localFileHandler, &msSize) == 0) {
        return GetLastError();
    }

    fileSize = msSize.QuadPart;
    localFileMappingHandler = CreateFileMappingFromApp(localFileHandler, NULL, pageFileAccessMode, fileSize, NULL);
    if (localFileMappingHandler == nullptr) {
        return GetLastError();
    }

    *fileHandler = localFileHandler;
    *fileMappingHandler = localFileMappingHandler;
    return S_OK;
}

DWORD getView(AccessMode accessMode, HANDLE fileMappingHandler, std::uint64_t beginIndex, std::uint64_t lengthOfView, void ** mapView) {
    DWORD mapViewAccessMode;

    switch (accessMode) {
    case AccessMode::READ:
        mapViewAccessMode = FILE_MAP_READ;
        break;
    case AccessMode::READ_WRITE:
        mapViewAccessMode = FILE_MAP_READ | FILE_MAP_WRITE;
        break;
    }

    *mapView = MapViewOfFileFromApp(fileMappingHandler, mapViewAccessMode, beginIndex, lengthOfView);
    if (*mapView == nullptr) {
        return GetLastError();
    }

    return S_OK;
}

DWORD getFileMapViewAndPrint() {
    DWORD errorCode;
    // don't forget, UWP app have write access only inside container local folder
    std::wstring filename = L"test.txt";

    // open file with desired acces and create file mapping 
    HANDLE fileHandle;
    HANDLE fileMappingHandle;
    std::size_t fileSize;
    errorCode = openFileForMapping(AccessMode::READ, filename.c_str(), &fileHandle, fileSize, &fileMappingHandle);
    if (errorCode != S_OK) {
        return errorCode;
    }

    // using created file mapping project map view to file
    void * mapView;
    errorCode = getView(AccessMode::READ, fileMappingHandle, 0, fileSize, &mapView);
    if (errorCode != S_OK) {
        return errorCode;
    }

    // mapView now contains row data from file, in my case it was txt
    // with UTF8 text so I just need to cast void to char
    OutputDebugStringA(static_cast<char*>(mapView));
    OutputDebugStringA("\n");

    // cleanup
    UnmapViewOfFile(mapView);
    mapView = nullptr;
    CloseHandle(fileMappingHandle);
    CloseHandle(fileHandle);

    return S_OK;
}