checkcom.cpp

来自「Linux环境下的串口通讯程序」· C++ 代码 · 共 52 行

//---------------------------------------------------------------------------

#include <clx.h>
#pragma hdrstop

#include "checkcom.h"
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>

#pragma package(smart_init)
//---------------------------------------------------------------------------

//   Important: Methods and properties of objects in CLX can only be
//   used in a method called using Synchronize, for example:
//
//      Synchronize(&UpdateCaption);
//
//   where UpdateCaption could look like:
//
//      void __fastcall TCheckCom::UpdateCaption()
//      {
//        Form1->Caption = "Updated in a thread";
//      }
//---------------------------------------------------------------------------
int p_com_fd;

__fastcall TCheckCom::TCheckCom(bool CreateSuspended)
    : TThread(CreateSuspended)
{
}
//---------------------------------------------------------------------------
void __fastcall TCheckCom::Execute()
{
    fd_set rfd;
    int max_fd;

    while(true)
    {
        if(Terminated)
            break;
        FD_ZERO(&rfd);
        FD_SET(p_com_fd, &rfd);
        max_fd = p_com_fd + 1;
        select(max_fd, &rfd, NULL, NULL, NULL);
        if(FD_ISSET(p_com_fd, &rfd))
            raise(SIGUSR1);
    }
}
//---------------------------------------------------------------------------