104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
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#include <iostream>
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#include <cxxopts.hpp>
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#include <filesystem>
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#include <fstream>
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#include <stdexcept>
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#include <cstdint>
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#include "MemMapping.h"
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int main(int argc, char * argv[]) {
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using namespace std::literals::string_literals;
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using namespace std::literals::string_view_literals;
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cxxopts::Options options(
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"FileToSharedMem",
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"FileToSharedMem: copies file content to memory location.\n"
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""
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);
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options.set_width(160);
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options.add_options()
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("help", "Display this help", cxxopts::value<bool>()->default_value("false"))
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("verbose", "Verbose output", cxxopts::value<bool>()->default_value("true"))
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("file", "Set binary file path", cxxopts::value<std::string>()->default_value("Project.bin"))
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("addr", "Set memory physical address", cxxopts::value<std::string>()->default_value("0xa6000000"));
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auto result = options.parse(argc, argv);
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if (result["help"].as<bool>())
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return not( std::cout << options.help() << std::endl );
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std::string file_path = result["file"].as<std::string>();
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uint64_t addr = std::stoull(result["addr"].as<std::string>(), nullptr, 0);
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std::ifstream fin(file_path, std::ios::in | std::ios::binary);
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if(!fin)
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{
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fprintf(stderr, "Couldn't open file %s", file_path);
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exit(1);
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}
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//service fields in shared mem
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struct
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{
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uint32_t len;
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uint32_t mark;
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} service = {.len = std::filesystem::file_size(file_path), .mark = 0};
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const int accessQuant = 8;
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const int map_len = service.len + sizeof(service) + accessQuant; //с небольшим запасом
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MemMapping map(O_RDWR | O_SYNC, addr, map_len, PROT_READ | PROT_WRITE, MAP_SHARED);
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void * pDst = map.get();
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memcpy(pDst, &service, sizeof(service));
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pDst += sizeof(service);
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{
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const uint32_t mask = accessQuant - 1;
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const int buf_len = (service.len & mask) ? ((service.len & ~mask) + accessQuant) : service.len;
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std::vector<char> buf(buf_len);
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if(!fin.read(buf.data(), service.len))
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{
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fprintf(stderr, "Couldn't read from file");
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exit(1);
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}
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memcpy(pDst, buf.data(), buf.size());
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// По одному байту работает, но некрасиво
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//
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// int i;
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// char * p = (char *)pDst;
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// const char * pSrc = buf.data();
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// for(i = 0; i < service.len; i++)
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// *p++ = *pSrc++;
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}
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//Так нельзя - получаем Bus error
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//
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// if(!fin.read((char *)pDst, service.len))
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// {
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// fprintf(stderr, "Couldn't read from file");
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// exit(1);
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// }
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service.mark = 0x12345678;
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pDst = map.get();
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memcpy(pDst, &service, sizeof(service));
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return 0;
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}
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