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PClient.cpp

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// PClient.cpp: implementation of the PClient class.


#include "StdAfx.h"
#include "PClient.h"
#include "errorCodes.h"

// Construction/Destruction

PClient::PClient(const TString &name, const bool isOut)
: Pipe( name, isOut )
{
    hPipe = INVALID_HANDLE_VALUE;
}

PClient::~PClient()
{
    disconnect();
}

// Member Functions

void PClient::disconnect()
{   
    if(hPipe != INVALID_HANDLE_VALUE){
        CloseHandle(hPipe);
        hPipe = INVALID_HANDLE_VALUE;
    }
    ResetEvent(serverStayConnected);
}

DWORD PClient::connect()
{
    if( isConnected() )
        return PC_ALREADY_CONNECTED;
    
    if( WaitForSingleObject(clientStayConnected, 0) == WAIT_OBJECT_0 ){
        return PC_NOT_RESET;    // Server yet to process disconnect event
    }

    hPipe = CreateFile( 
        pipeName,           // pipe name 
        isOutbound ? GENERIC_WRITE : GENERIC_READ,  // read and write access 
        0,                  // no sharing 
        NULL,               // no security attributes
        OPEN_EXISTING,      // opens existing pipe 
        0,                  // default attributes 
        NULL);              // no template file 
    
    if (hPipe == INVALID_HANDLE_VALUE){ 
        if (GetLastError() == ERROR_PIPE_BUSY) 
            return PC_BUSY;
        else
            return PC_FAILED;
    } else
        return PC_CONNECTED;
}

bool PClient::isConnected()
{
    if( WaitForSingleObject(serverStayConnected, 0) == WAIT_OBJECT_0 ){
        this->disconnect();
    }

    return  hPipe != INVALID_HANDLE_VALUE;
}

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