Boost 範例程式：共享記憶體
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#include <iostream>#include <iomanip>#include <string>#include <math.h>#include <chrono>#include <thread>#include "TCSV.h"#include "TMEMFile.h"using namespace std; using namespace Emprogria; class Stock { private: typedef struct { unsigned char date[10]; float stockOpen, stockHigh, stockLow, stockClose, stockVol, stockAdjClose; } MEM_STOCK; MEM_STOCK Output(FIELDS fields) { MEM_STOCK data; // 更換日期格式 std::string newDate = boost::replace_all_copy(fields.at(0), "/", "-"); std::cout << newDate << '\t'; std::memcpy(data.date, fields.at(0).c_str(), sizeof(char) * fields.at(0).size()); for (unsigned i = 1; i < fields.size(); i++) { // 字串轉換成浮點數 float v = std::stof(fields.at(i)); switch (i) { case 1: data.stockOpen = v; break; case 2: data.stockHigh = v; break; case 3: data.stockLow = v; break; case 4: data.stockClose = v; break; case 5: v = log(v); data.stockVol = v; break; case 6: data.stockAdjClose = v; break; } std::cout << std::setprecision(2) << std::fixed << v << '\t'; } std::cout << std::endl; return data; } ; void Output(MEM_STOCK *data) { std::cout << data->date << '\t'; std::cout << std::setprecision(2) << std::fixed << data->stockOpen << '\t'; std::cout << std::setprecision(2) << std::fixed << data->stockHigh << '\t'; std::cout << std::setprecision(2) << std::fixed << data->stockLow << '\t'; std::cout << std::setprecision(2) << std::fixed << data->stockClose << '\t'; std::cout << std::setprecision(2) << std::fixed << data->stockVol << '\t'; std::cout << std::setprecision(2) << std::fixed << data->stockAdjClose << '\n'; } public: // 格式化輸出檔案資料 void Print(ROWS rows) { TMEMFile *worker = new TMEMFile("STOCK", sizeof(MEM_STOCK) * rows.size()); for (unsigned i = 0; i < rows.size(); i++) { MEM_STOCK data = this->Output(rows.at(i)); worker->Put(i * sizeof(MEM_STOCK), (void *) &data, sizeof(MEM_STOCK)); } std::chrono::duration<int, std::milli> timespan(1000 * 50); std::this_thread::sleep_for(timespan); delete worker; } // 格式化輸出共享記憶體內資料 void Print() { TMEMFile *worker = new TMEMFile("STOCK", 0); size_t packs = worker->GetMemSize() / sizeof(MEM_STOCK); for (unsigned i = 0; i < packs; i++) { MEM_STOCK *data = (MEM_STOCK*) worker->Get(i * sizeof(MEM_STOCK), sizeof(MEM_STOCK)); if (data == NULL) { break; } this->Output(data); } delete worker; } }; // 主程式int main(int argc, char* argv[]) { std::string csvFile = ""; TCSV *csv = new TCSV(); Stock *worker = new Stock(); if (argc > 1) { csvFile = argv[1]; ROWS rows = csv->Load(csvFile); if (rows.size() > 0) { worker->Print(rows); } } else { worker->Print(); } delete worker; delete csv; return 0; }