2018. 12. 10. 16:37 C++

C/C++ | 밀리세컨드 까지 뽑아오기

#include <cstdio>
#include <cstdlib>​
#include <sys/timeb.h>​
#include <ctime>
#include <ctime>


struct timeb timer_msec;
ftime(&timer_msec);

tm *ts = localtime(&timer_msec.time);

int year = ts->tm_year + 1900;
int month = ts->tm_mon + 1;
int day = ts->tm_mday;
int hour = ts->tm_hour;
int min = ts->tm_min;
int sec = ts->tm_sec;
int milli = timer_msec.millitm;




/////////////////////////////
c ++

#include <sys/time.h>
#include <chrono>
#include <cstdio>
#include <cstring>
#include <ctime>
#include <iostream>​

auto time = std::chrono::system_clock::now();
auto mill = std::chrono::duration_cast<std::chrono::milliseconds>(time.time_since_epoch());

long long currentTimeMillis = mill.count();
int msc = currentTimeMillis % 1000;
long nowTime = currentTimeMillis / 1000;

tm *ts = localtime(&nowTime);

int year = ts->tm_year + 1900;
int month = ts->tm_mon + 1;
int day = ts->tm_mday;
int hour = ts->tm_hour;
int min = ts->tm_min;
int sec = ts->tm_sec;
char temp[1024] = { '\0' };
sprintf(temp, "%04d-%02d-%02d %02d:%02d:%02d.%d   \n",  year, month, day, hour, min, sec, msc);



Posted by 선화

2009. 8. 2. 20:23 TCP / IP

[ C / C++ ] .. 쓰레드 생성

for .. C

(HANDLE)_beginthreadex(NULL, 0, ClientConn, (void*)clntSock, 0, (unsigned *)&dwThreadID);


for .. C++

(HANDLE)_beginthreadex(NULL, 0, (unsigned int(__stdcall*)(void*))ClientConn, (void*)clntSock, 0, (unsigned *)&dwThreadID);


CreateThread 라는 함수도 있음..
Posted by 선화

2009. 6. 1. 13:43 TCP / IP

[ tcp / ip ] - Echo Server

  1. #include <iostream>
  2. #include <winsock2.h>
  3. #pragma comment(lib, "ws2_32.lib")
  4. using namespace std;

  6. const int MAX_LEN = 100;
  7. typedef struct
  8. {
  9.     SOCKET hClntSock;
  10.     SOCKADDR_IN clntAddr;
  11. }PER_HANDLE_DATA, *LPPER_HANDLE_DATA;

  13. typedef struct
  14. {
  15.     OVERLAPPED overlapped;
  16.     char buffer[MAX_LEN];
  17.     WSABUF wsaBuf;
  18. }PER_IO_DATA, *LPPER_IO_DATA;

  20. DWORD WINAPI CompletionThread(LPVOID ComplectionPortIO);
  21. void ErrorHandling(char * msg);

  23. int main(void)
  24. {
  25.     WSADATA wsaData;
  26.     HANDLE hCompletionPort;
  27.     SYSTEM_INFO SystemInfo;
  28.     SOCKADDR_IN servAddr;
  29.     LPPER_IO_DATA PerIoData;
  30.     LPPER_HANDLE_DATA PerHandleData;

  32.     SOCKET hServSock;
  33.     unsigned long RecvBytes;
  34.     unsigned long i, Flags;

  36.     if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
  37.         ErrorHandling("윈속초기화에러");

  39.     //1. Completion Port 생성
  40.     hCompletionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL,0, 0);
      
  41. GetSystemInfo(&SystemInfo);

  43.     //2. 쓰레드를 CPU 개수만큼 생성.
  44.     for (i = 0; i < SystemInfo.dwNumberOfProcessors; i++)
  45.         CreateThread(NULL, 0, CompletionThread, (LPVOID)hCompletionPort, 0, NULL);

  47.     hServSock = WSASocket(AF_INET, SOCK_STREAM, 0, NULL, 0, WSA_FLAG_OVERLAPPED);
  48.     servAddr.sin_family = AF_INET;
  49.     servAddr.sin_addr.s_addr = htonl(INADDR_ANY);
  50.     servAddr.sin_port = htons((u_short)atoi("9999"));

  52.     bind(hServSock, (SOCKADDR * )&servAddr, sizeof(servAddr));
  53.     listen(hServSock, 5);

  55.     while (true)
  56.     {
  57.         SOCKET hClntSock;
  58.         SOCKADDR_IN clntAddr;

  60.         int addrLen = sizeof(clntAddr);

  62.         hClntSock = accept(hServSock, (SOCKADDR *)&clntAddr, &addrLen);

  64.         // 연결된 클라이언트의 소켓 핸들 정보와 주소 정보를 설정.
  65.         PerHandleData =
  66. (LPPER_HANDLE_DATA)malloc(sizeof(PER_HANDLE_DATA));
  67.         PerHandleData->hClntSock = hClntSock;
  68.         memcpy(&(PerHandleData->clntAddr), &clntAddr, addrLen);
  69.        
  70.         //3. Overlapped 소켓과 CompletionPort의 연결.
  71.         CreateIoCompletionPort((HANDLE)hClntSock, hCompletionPort, (DWORD)PerHandleData, 0);

  73.         //클라이언트를 위한 버퍼를 설정, OVERLAPPED 변수 초기화
  74.         PerIoData = (LPPER_IO_DATA)malloc(sizeof(PER_IO_DATA));
  75.         memset(&(PerIoData->overlapped), 0, sizeof(OVERLAPPED));
  76.         PerIoData->wsaBuf.len = MAX_LEN;
  77.         PerIoData->wsaBuf.buf = PerIoData->buffer;
  78.         Flags = 0;

  80.         //4. 중첨된 데이터 입력.
  81.         WSARecv(PerHandleData->hClntSock,    // 데이터 입력소켓.
                    &(PerIoData->wsaBuf),        //데이터 입력 버퍼 포인터.
                    1,                            //데이터 입력버퍼의 수.
                    &RecvBytes,
                    &Flags,
                    &(PerIoData->overlapped),    //OVERLAPPED 변수 포인터.
                    NULL);
  82.     }
  83.     return 0;
  84. }

  86. DWORD WINAPI CompletionThread(LPVOID pComPort)
  87. {
  88.     HANDLE hCompletionPort = (HANDLE)pComPort;
  89.     DWORD BytesTransferred;
  90.     LPPER_HANDLE_DATA PerHandleData;
  91.     LPPER_IO_DATA PerIoData;

  93.     DWORD Flags;

  95.     while (true)
  96.     {
  97.         //5. 입. 출력이 완료된 소켓의 정보를 얻음.
  98.         GetQueuedCompletionStatus(hCompletionPort,    //Completion Port
                                      &BytesTransferred, //전송된 바이트수.
                                      (LPDWORD)&PerHandleData,
                                      (LPOVERLAPPED *)&PerIoData,
                                      INFINITE);

  99.         if (BytesTransferred == 0) // EOF전송시
  100.         {
  101.             closesocket(PerHandleData->hClntSock);
  102.             free(PerHandleData);
  103.             free(PerIoData);
  104.             continue;
  105.         }

  107.         //6. 메시지! 클라이언트로 에코.
  108.         PerIoData->wsaBuf.len = BytesTransferred;
  109.         WSASend(PerHandleData->hClntSock, &(PerIoData->wsaBuf), 1, NULL, 0, NULL, NULL);

  111.         //Receive Again
  112.         memset(&(PerIoData->overlapped), 0, sizeof(OVERLAPPED));
  113.         PerIoData->wsaBuf.len = MAX_LEN;
  114.         PerIoData->wsaBuf.buf = PerIoData->buffer;

  116.         Flags = 0;

  118.        WSARecv(PerHandleData->hClntSock, &(PerIoData->wsaBuf), 1, NULL, &Flags, &(PerIoData->overlapped), NULL);
  119.     }
  120.     return 0;
  121. }


  124. void ErrorHandling(char * msg)
  125. {
  126.     fputs(msg, stderr);
  127.     fputc('\n', stderr);
  128.     exit(1);
  129. }
Posted by 선화
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