[쓰레드] 쓰레드에서 메세지 콜을 이용하여 다이얼로그 갱신

다중 쓰레드 환경의 쓰레드 함수 내부에서 다이얼로그의 UpdateData()를 사용하게 되면 에러가 발생한다. 

쓰레드 함수에서 메세지를 송신하고, 다이얼로그 내부 함수에서 메세지를 수신하여 UpdateData()를 실행하면 된다.

  // 메세지 콜 함수 정의 afx_msg LRESULT OnIoThreadMsgUpdate_IN(WPARAM a_wParam, LPARAM a_lParam); afx_msg LRESULT OnIoThreadMsgUpdate_OUT(WPARAM a_wParam, LPARAM a_lParam); afx_msg LRESULT OnIoThreadMsgUpdate_END(WPARAM a_wParam, LPARAM a_lParam); // 수신 메세지와 함수를 연동 BEGIN_MESSAGE_MAP(IoBoardDlg, CDialogEx) ON_WM_PAINT() ON_MESSAGE(_WM_IO_THREAD_UPDATE_IN, (LRESULT(AFX_MSG_CALL CWnd::*)(WPARAM, LPARAM)) OnIoThreadMsgUpdate_IN) ON_MESSAGE(_WM_IO_THREAD_UPDATE_OUT, (LRESULT(AFX_MSG_CALL CWnd::*)(WPARAM, LPARAM)) OnIoThreadMsgUpdate_OUT) ON_MESSAGE(_WM_IO_THREAD_UPDATE_END, (LRESULT(AFX_MSG_CALL CWnd::*)(WPARAM, LPARAM)) OnIoThreadMsgUpdate_END) END_MESSAGE_MAP() // 쓰레드 함수 UINT IoBoardDlg::Thread_IoBoard_Running(IoBoardDlg* pDlg) { int nInputEn; BOOL bChkOutBtn; U16 uOldInPort = 0xFFFF; U16 uOldOutPort = 0x0000; dp("- IO Board Thread Open -\n"); pDlg->m_bThreadStatus_Run = 1; while(pDlg->m_nBtnConnect == 1) { //////////////////////////////////////////// // 입력 포트 pDlg->uInPort = m_IoBoard->GetInPort(); dp("uInPort : %4X\n", pDlg->uInPort); if ( uOldInPort != pDlg->uInPort ) { uOldInPort = pDlg->uInPort; pDlg->PostMessageW(_WM_IO_THREAD_UPDATE_IN); dp("uInPort <--- %4X\n", pDlg->uInPort); } //////////////////////////////////////////// // 출력 포트 pDlg->PostMessageW(_WM_IO_THREAD_UPDATE_OUT); printf("uOutPort : %4X\n", pDlg->uOutPort); if ( uOldOutPort != pDlg->uOutPort ) { uOldOutPort = pDlg->uOutPort; m_IoBoard->PutOutPort(pDlg->uOutPort); dp("uOutPort ---> %4X\n", pDlg->uOutPort); } Sleep(200); } dp("- IO Board Thread Close -\n"); pDlg->PostMessageW(_WM_IO_THREAD_UPDATE_END); return true; } // _WM_IO_THREAD_UPDATE_IN 메세지 콜 함수 LRESULT IoBoardDlg::OnIoThreadMsgUpdate_IN(WPARAM a_wParam, LPARAM a_lParam) { int nInputBit[16]; int CHK_BIT = 0x0001; int nIdxBit; UpdateData(TRUE); for ( nIdxBit = 0; nIdxBit < 16; nIdxBit++ ) { nInputBit[nIdxBit] = (uInPort & CHK_BIT)? 1 : 0; CHK_BIT <<= 1; } CButtonClickedOn( &m_cbutton_in0, nInputBit[0] ); m_cbutton_in0.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in1, nInputBit[1] ); m_cbutton_in1.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in2, nInputBit[2] ); m_cbutton_in2.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in3, nInputBit[3] ); m_cbutton_in3.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in4, nInputBit[4] ); m_cbutton_in4.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in5, nInputBit[5] ); m_cbutton_in5.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in6, nInputBit[6] ); m_cbutton_in6.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in7, nInputBit[7] ); m_cbutton_in7.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in8, nInputBit[8] ); m_cbutton_in8.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in9, nInputBit[9] ); m_cbutton_in9.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in10, nInputBit[10] ); m_cbutton_in10.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in11, nInputBit[11] ); m_cbutton_in11.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in12, nInputBit[12] ); m_cbutton_in12.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in13, nInputBit[13] ); m_cbutton_in13.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in14, nInputBit[14] ); m_cbutton_in14.PostMessageW(_WM_THREAD_UPDATE); CButtonClickedOn( &m_cbutton_in15, nInputBit[15] ); m_cbutton_in15.PostMessageW(_WM_THREAD_UPDATE); UpdateData(FALSE); return 0; } // _WM_IO_THREAD_UPDATE_OUT 메세지 콜 함수 LRESULT IoBoardDlg::OnIoThreadMsgUpdate_OUT(WPARAM a_wParam, LPARAM a_lParam) { unsigned short int uOut = 0x0000; unsigned short int OUT_BIT = 0x0001; UpdateData(TRUE); // 체크 되어있는지 알아보기 if(IsDlgButtonChecked(IDC_OUT0)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT1)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT2)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT3)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT4)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT5)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT6)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT7)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT8)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT9)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT10)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT11)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT12)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT13)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT14)) uOut |= OUT_BIT; OUT_BIT<<=1; if(IsDlgButtonChecked(IDC_OUT15)) uOut |= OUT_BIT; OUT_BIT<<=1; uOutPort = uOut; UpdateData(FALSE); return 0; } // _WM_IO_THREAD_UPDATE_END 메세지 콜 함수 LRESULT IoBoardDlg::OnIoThreadMsgUpdate_END(WPARAM a_wParam, LPARAM a_lParam) { UpdateData(TRUE); m_bThreadStatus_Run = 0; UpdateData(FALSE); return 0; }