dsa_tsjl06tasync.cpp

用线程方式实现全双工RS232 IO的C++源代码

//---------------------------------------------------------------------------
#include <windows.h>
#pragma hdrstop

#include "dsa_TSJL06TAsync.h"
//---------------------------------------------------------------------------

#pragma package(smart_init)

//---------------------------------------------------------------------------
TRs232Async::TRs232Async(bool debug)
{
    PrintDebugInfo=debug;
    PortOpened=false;

    overlapRX.hEvent=INVALID_HANDLE_VALUE;
    overlapTX.hEvent=INVALID_HANDLE_VALUE;
    overlapWait.hEvent=INVALID_HANDLE_VALUE;

    ThreadRun=false;

    NotifyWindow=NULL;
    ReceiverMessageId=WM_USER+741;
    SenderMessageId=0;
}
//---------------------------------------------------------------------------
TRs232Async::~TRs232Async()
{
    Close();
}
//---------------------------------------------------------------------------
void TRs232Async::PrintException(string Caller, string &Message)
{
    if(PrintDebugInfo){
        LPVOID lpMsgBuf;
        FormatMessage(
            FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
            NULL,
            GetLastError(),
            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
            (LPTSTR) &lpMsgBuf,
            0,
            NULL
        );
        Message="GetLastError="+string((char *)lpMsgBuf)+Caller+": "+Message;

        // Free the buffer.
        LocalFree( lpMsgBuf );

        MessageBox(NotifyWindow, Message.c_str(), "Exception Message", MB_OK|MB_ICONWARNING);
    }
}
//---------------------------------------------------------------------------
string TRs232Async::EnumerateProvider(int ProvSubType)
{
    switch(ProvSubType){
        case PST_FAX:               return "FAX device";
        case PST_LAT:               return "LAT protocol";
        case PST_MODEM:             return "Modem device";
        case PST_NETWORK_BRIDGE:    return "Unspecified network bridge";
        case PST_PARALLELPORT:      return "Parallel port";
        case PST_RS232:             return "RS-232 serial port";
        case PST_RS422:             return "RS-422 port";
        case PST_RS423:             return "RS-423 port";
        case PST_RS449:             return "RS-449 port";
        case PST_SCANNER:           return "Scanner device";
        case PST_TCPIP_TELNET:      return "TCP/IP Telnet