Пример #1
0
int
main(int argc, char **argv)
{
	ULONG FrameFlags = FCF_TITLEBAR |
			   FCF_SYSMENU |
			   FCF_SIZEBORDER |
			   FCF_HIDEBUTTON |
			   FCF_SHELLPOSITION |
			   FCF_TASKLIST;
	HAB hab;
	HMQ hmq;
	HWND Client;
	QMSG qmsg;
	arglist args;
	int python_tid;

	/* init PM and create message queue */
	hab = WinInitialize(0);
	hmq = WinCreateMsgQueue(hab, 0);

	/* create a (hidden) Window to house the window procedure */
	args.Frame = WinCreateStdWindow(HWND_DESKTOP,
					0,
					&FrameFlags,
					NULL,
					"PythonPM",
					0L,
					0,
					0,
					&Client);

	/* run Python interpreter in a thread */
	args.argc = argc;
	args.argv = argv;
	args.running = 0;
	if (-1 == (python_tid = _beginthread(PythonThread, NULL, 1024 * 1024, &args)))
	{
		/* couldn't start thread */
		WinAlarm(HWND_DESKTOP, WA_ERROR);
		PythonRC = 1;
	}
	else
	{
		/* process PM messages, until Python exits */
		while (WinGetMsg(hab, &qmsg, NULLHANDLE, 0, 0))
			WinDispatchMsg(hab, &qmsg);
		if (args.running > 0)
			DosKillThread(python_tid);
	}
		
	/* destroy window, shutdown message queue and PM */
	WinDestroyWindow(args.Frame);
	WinDestroyMsgQueue(hmq);
	WinTerminate(hab);

	return PythonRC;
}
Пример #2
0
void StopKeyBarService(void)
{
   if (KeyBarHelp.service)
      {
      KeyBarHelp.flag=0;
      DosKillThread(KeyBarHelp.service);
      KeyBarHelp.service=0L;
      ResetKeyBar();
      }
}
Пример #3
0
void StopTimeService(void)
{
   if (Times.service)
      {
      DosKillThread(Times.service);
      Times.service=0L;
      if (Times.add_service)
         CHF_RemoveChain(Times.add_service);
      }
}
/*--------------------------------------------------
 * Stops the thread
 *-------------------------------------------------*/
PMThread& PMThread::stop()
{
  if( is_alive() && tid() != -1 )
  {
    APIRET rc = DosKillThread( tid());

    if( rc != NO_ERROR && rc != ERROR_INVALID_THREADID )
      PM_THROW_OS2ERROR(rc);

    run_alive = FALSE;
    run_id    = -1;
  }
  return *this;
}
Пример #5
0
int
sanei_thread_kill( SANE_Pid pid )
{
	DBG(2, "sanei_thread_kill() will kill %ld\n", (long) pid);
#ifdef USE_PTHREAD
#if defined (__APPLE__) && defined (__MACH__)
	return pthread_kill((pthread_t)pid, SIGUSR2);
#else
	return pthread_cancel((pthread_t)pid);
#endif
#elif defined HAVE_OS2_H
	return DosKillThread(pid);
#else
	return kill( pid, SIGTERM );
#endif
}
Пример #6
0
/*--------------------------------------------------------------------------------------*\
 * Procedure to create/close a secondary thread.                                        *
 * Req:                                                                                 *
 *      bCreate ....... Create/close a thread                                           *
 *      pUPS_Thread ... Pointer to a function implementing the thread                   *
 * Returns:                                                                             *
 *      TRUE/FALSE .... If called sucessfully/unsucessfully                             *
\*--------------------------------------------------------------------------------------*/
BOOL    UPS_ThreadCreate(BOOL bCreate, PFNTHREAD pUPS_Thread)
{
static ULONG    ulThreadArg=0;
static ULONG    ulThreadFlag=0;
static ULONG    ulStackSize=8192;
static TID      tidThread;

if(bCreate==TRUE)
    {
    DosCreateThread(                    /* Create a secondary thread */
        &tidThread,                     /* Thread ID of created thread */
        pUPS_Thread,                    /* Pointer to thread */
        ulThreadArg,                    /* Thread arguments */
        ulThreadFlag,                   /* Thread flags */
        ulStackSize);                   /* Thread's stack size */
    return(TRUE);
    }
else
    {
    DosKillThread(                      /* Kill the secondary thread */
        tidThread);                     /* Thread ID of thread to be killed */
    return(TRUE);
    }
}
Пример #7
0
void ap_mpm_child_main(apr_pool_t *pconf)
{
    ap_listen_rec *lr = NULL;
    int requests_this_child = 0;
    int rv = 0;
    unsigned long ulTimes;
    int my_pid = getpid();
    ULONG rc, c;
    HQUEUE workq;
    apr_pollset_t *pollset;
    int num_listeners;
    TID server_maint_tid;
    void *sb_mem;

    /* Stop Ctrl-C/Ctrl-Break signals going to child processes */
    DosSetSignalExceptionFocus(0, &ulTimes);
    set_signals();

    /* Create pool for child */
    apr_pool_create(&pchild, pconf);

    ap_run_child_init(pchild, ap_server_conf);

    /* Create an event semaphore used to trigger other threads to shutdown */
    rc = DosCreateEventSem(NULL, &shutdown_event, 0, FALSE);

    if (rc) {
        ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf,
                     "unable to create shutdown semaphore, exiting");
        clean_child_exit(APEXIT_CHILDFATAL);
    }

    /* Gain access to the scoreboard. */
    rc = DosGetNamedSharedMem(&sb_mem, ap_scoreboard_fname,
                              PAG_READ|PAG_WRITE);

    if (rc) {
        ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf,
                     "scoreboard not readable in child, exiting");
        clean_child_exit(APEXIT_CHILDFATAL);
    }

    ap_calc_scoreboard_size();
    ap_init_scoreboard(sb_mem);

    /* Gain access to the accpet mutex */
    rc = DosOpenMutexSem(NULL, &ap_mpm_accept_mutex);

    if (rc) {
        ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf,
                     "accept mutex couldn't be accessed in child, exiting");
        clean_child_exit(APEXIT_CHILDFATAL);
    }

    /* Find our pid in the scoreboard so we know what slot our parent allocated us */
    for (child_slot = 0; ap_scoreboard_image->parent[child_slot].pid != my_pid && child_slot < HARD_SERVER_LIMIT; child_slot++);

    if (child_slot == HARD_SERVER_LIMIT) {
        ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf,
                     "child pid not found in scoreboard, exiting");
        clean_child_exit(APEXIT_CHILDFATAL);
    }

    ap_my_generation = ap_scoreboard_image->parent[child_slot].generation;
    memset(ap_scoreboard_image->servers[child_slot], 0, sizeof(worker_score) * HARD_THREAD_LIMIT);

    /* Set up an OS/2 queue for passing connections & termination requests
     * to worker threads
     */
    rc = DosCreateQueue(&workq, QUE_FIFO, apr_psprintf(pchild, "/queues/httpd/work.%d", my_pid));

    if (rc) {
        ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf,
                     "unable to create work queue, exiting");
        clean_child_exit(APEXIT_CHILDFATAL);
    }

    /* Create initial pool of worker threads */
    for (c = 0; c < ap_min_spare_threads; c++) {
//        ap_scoreboard_image->servers[child_slot][c].tid = _beginthread(worker_main, NULL, 128*1024, (void *)c);
    }

    /* Start maintenance thread */
    server_maint_tid = _beginthread(server_maintenance, NULL, 32768, NULL);

    /* Set up poll */
    for (num_listeners = 0, lr = ap_listeners; lr; lr = lr->next) {
        num_listeners++;
    }

    apr_pollset_create(&pollset, num_listeners, pchild, 0);

    for (lr = ap_listeners; lr != NULL; lr = lr->next) {
        apr_pollfd_t pfd = { 0 };

        pfd.desc_type = APR_POLL_SOCKET;
        pfd.desc.s = lr->sd;
        pfd.reqevents = APR_POLLIN;
        pfd.client_data = lr;
        apr_pollset_add(pollset, &pfd);
    }

    /* Main connection accept loop */
    do {
        apr_pool_t *pconn;
        worker_args_t *worker_args;
        int last_poll_idx = 0;

        apr_pool_create(&pconn, pchild);
        worker_args = apr_palloc(pconn, sizeof(worker_args_t));
        worker_args->pconn = pconn;

        if (num_listeners == 1) {
            rv = apr_socket_accept(&worker_args->conn_sd, ap_listeners->sd, pconn);
        } else {
            const apr_pollfd_t *poll_results;
            apr_int32_t num_poll_results;

            rc = DosRequestMutexSem(ap_mpm_accept_mutex, SEM_INDEFINITE_WAIT);

            if (shutdown_pending) {
                DosReleaseMutexSem(ap_mpm_accept_mutex);
                break;
            }

            rv = APR_FROM_OS_ERROR(rc);

            if (rv == APR_SUCCESS) {
                rv = apr_pollset_poll(pollset, -1, &num_poll_results, &poll_results);
                DosReleaseMutexSem(ap_mpm_accept_mutex);
            }

            if (rv == APR_SUCCESS) {
                if (last_poll_idx >= num_listeners) {
                    last_poll_idx = 0;
                }

                lr = poll_results[last_poll_idx++].client_data;
                rv = apr_socket_accept(&worker_args->conn_sd, lr->sd, pconn);
                last_poll_idx++;
            }
        }

        if (rv != APR_SUCCESS) {
            if (!APR_STATUS_IS_EINTR(rv)) {
                ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf,
                             "apr_socket_accept");
                clean_child_exit(APEXIT_CHILDFATAL);
            }
        } else {
            DosWriteQueue(workq, WORKTYPE_CONN, sizeof(worker_args_t), worker_args, 0);
            requests_this_child++;
        }

        if (ap_max_requests_per_child != 0 && requests_this_child >= ap_max_requests_per_child)
            break;
    } while (!shutdown_pending && ap_my_generation == ap_scoreboard_image->global->running_generation);

    ap_scoreboard_image->parent[child_slot].quiescing = 1;
    DosPostEventSem(shutdown_event);
    DosWaitThread(&server_maint_tid, DCWW_WAIT);

    if (is_graceful) {
        char someleft;

        /* tell our worker threads to exit */
        for (c=0; c<HARD_THREAD_LIMIT; c++) {
            if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) {
                DosWriteQueue(workq, WORKTYPE_EXIT, 0, NULL, 0);
            }
        }

        do {
            someleft = 0;

            for (c=0; c<HARD_THREAD_LIMIT; c++) {
                if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) {
                    someleft = 1;
                    DosSleep(1000);
                    break;
                }
            }
        } while (someleft);
    } else {
        DosPurgeQueue(workq);

        for (c=0; c<HARD_THREAD_LIMIT; c++) {
            if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) {
                DosKillThread(ap_scoreboard_image->servers[child_slot][c].tid);
            }
        }
    }

    apr_pool_destroy(pchild);
}
Пример #8
0
int main (int argc, char *argv[])
   {
   APIRET       rc;
   PCHAR        pcEnv;
   PRFPROFILE   prfProfile;

#ifdef DEBUG
   ulDebugMask = 0xFFFFFFFF;
#endif /* DEBUG */

   hab = WinInitialize(0);
   hmq = WinCreateMsgQueue(hab, 0);
   DebugS (1, "PM Interface initialized");

   /* Shared Memory organisieren */
   if (rc = DosGetNamedSharedMem ((PPVOID) &pShareInitOS2,
                                  SHARE_INITOS2,
                                  PAG_READ | PAG_WRITE))
      {
      if (rc = DosAllocSharedMem( (PPVOID) &pShareInitOS2,    // Pointer to shared mem
                                  SHARE_INITOS2,              // Name
                                  CCHSHARE_INITOS2,           // Size of shared mem
                                  PAG_COMMIT | PAG_READ | PAG_WRITE)) // Flags
         return(1);
      else
         {
         /* Shared Memory initialisieren */

         memset (pShareInitOS2, '\0', CCHSHARE_INITOS2);

         pShareInitOS2->pszRegFile       = (PCHAR) pShareInitOS2 +
                                          sizeof(*pShareInitOS2);
         strcpy (pShareInitOS2->pszRegFile,
                 DosScanEnv (ENV_SYSTEM_INI, &pcEnv) ? "" : pcEnv);
         pShareInitOS2->pszRootUserIni   = pShareInitOS2->pszRegFile +
                                          strlen(pShareInitOS2->pszRegFile) + 1;
         pShareInitOS2->pszRootSystemIni = pShareInitOS2->pszRootUserIni + 1;
         pShareInitOS2->pszUserIni       = pShareInitOS2->pszRootSystemIni + 1;
         pShareInitOS2->pszSystemIni     = pShareInitOS2->pszUserIni   + CCHMAXPATH;
         pShareInitOS2->pszEnvironment   = pShareInitOS2->pszSystemIni + CCHMAXPATH;
         }
      }
   DebugS (1, "Shared Memory initialized");

   /* Semaphoren organisieren */
   rc = DosOpenEventSem (HEV_SAMMY, &hevSammy);

   if( rc )
      rc = DosCreateEventSem( HEV_SAMMY,   // Name
                              &hevSammy,   // Pointer to sem
                              0,           // Not used with named sems
                              FALSE);      // Initial state (FALSE = SET)

   else        /* Sammy ist bereits installiert */
      {
      pShareInitOS2->pszEnvironment[0] = '\0';
      pShareInitOS2->pszEnvironment[1] = '\0';
      pShareInitOS2->pszSystemIni[0]   = '\0';
      pShareInitOS2->pszUserIni[0]     = '\0';
      DosPostEventSem(hevSammy);
      goto Exit;
      }

   if( rc )
      {
      intSammyRetCode = rc;
      goto Exit;
      }

   rc = DosOpenEventSem (HEV_PRFRESETLOCK, &hevPrfResetLock);

   if( rc )
      rc = DosCreateEventSem( HEV_PRFRESETLOCK, // Name
                              &hevPrfResetLock, // Pointer to sem
                              0,                // Not used with named sems
                              TRUE);            // Initial state (TRUE = POSTED)

   if( rc )
      {
      intSammyRetCode = rc;
      goto Exit;
      }
   DebugS (1, "Semaphores initialized");

   ChangeWPS(pShareInitOS2->pszUserIni, pShareInitOS2->pszSystemIni);

   /* Hintergrundloop starten, das Shell mit aktueller Env. startet */

   DosCreateThread (&tid1,
                    (PFNTHREAD) thStartProg,
                    (ULONG) ((argc > 1) ? argv[1] : ""),
                    0,
                    THREADSTACK);
   DebugS (1, "Background loop started");

   /* Hintergrundloop starten, das jeweils nach L�schen einer Semaphore */
   /* einen prfReset initiiert                      */
   DosCreateThread (&tid2,
                    (PFNTHREAD) thSwitch,
                    (ULONG) 0,
                    0,
                    THREADSTACK);

   while (WinGetMsg (hab, &qmsg, 0, 0, 0))
      WinDispatchMsg (hab, &qmsg);

   if (intSammyRetCode)
      {
      DosKillThread (tid1);
      DosKillThread (tid2);

      WinSetObjectData(WinQueryObject("<WP_DESKTOP>"), "WORKAREA=NO");
      WinPostMsg(WinQueryWindow(HWND_DESKTOP, QW_BOTTOM), WM_CLOSE, 0, 0);

      WinAlarm (HWND_DESKTOP, WA_ERROR);

      prfProfile.pszSysName  = (DosScanEnv (ENV_SYSTEM_INI, &pcEnv) ? "" : pcEnv);
      prfProfile.pszUserName = (DosScanEnv (ENV_USER_INI, &pcEnv) ? "" : pcEnv);

      prfProfile.cchUserName = strlen(prfProfile.pszUserName);
      prfProfile.cchSysName  = strlen(prfProfile.pszSysName);

      DosSleep (1000);
      DosKillProcess( DKP_PROCESSTREE, ulShellID );

      if ( !PrfReset(hab, &prfProfile))
         WinSetObjectData(WinQueryObject("<WP_DESKTOP>"), "OPEN=ICON;WORKAREA=YES");
      }
Exit:
   WinDestroyMsgQueue(hmq);
   WinTerminate(hab);

   DebugS (1, "Application terminated");

   return intSammyRetCode;
   }
Пример #9
0
/* WARNING: This function is really a last resort.
 * Threads should be signaled and then exit by themselves.
 * TerminateThread() doesn't perform stack and DLL cleanup.
 */
void SDL_SYS_KillThread(SDL_Thread *thread)
{
  DosKillThread(thread->handle);
}
Пример #10
0
MRESULT EXPENTRY fnwpNotifyDlg(HWND hwnd,USHORT msg,MPARAM mp1,MPARAM mp2)
  {
  static MSG *pMessage;
  NOTIFYLST *pNotify;
  ULONG ulSubNumber;
  ULONG ulGroupNumber;
  int iMsgLen;
  USHORT usLength;
  USHORT usSubCount;
  ULONG *pulSubNum;
  char szMessage[80];
  int iIndex;
  static TID tid;
  BYTE *pData;

  switch (msg)
    {
    case WM_INITDLG:
      pMessage = (MSG *)mp2;
      bNotifyLoop = FALSE;
      WinSendDlgItemMsg(hwnd,NOTIFY_SUB_NUMBER,
                                SPBM_SETLIMITS,
                                (MPARAM)usSubscriberListCount,
                                (MPARAM)1);
      WinSendDlgItemMsg(hwnd,NOTIFY_MESSAGE,MLM_FORMAT,(MPARAM)MLFIE_WINFMT,(MPARAM)NULL);
      break;
    case WM_COMMAND:
      switch(SHORT1FROMMP(mp1))
        {
        case DID_OK:
          if (bNotifyLoop)
            break;
          WinSendDlgItemMsg(hwnd,NOTIFY_SUB_NUMBER,SPBM_QUERYVALUE,&ulSubNumber,MPFROM2SHORT(0,SPBQ_DONOTUPDATE));
          iMsgLen = WinQueryDlgItemTextLength(hwnd,NOTIFY_MESSAGE);
//          iMsgLen = (int)WinSendDlgItemMsg(hwnd,NOTIFY_MESSAGE,MLM_QUERYTEXTLENGTH,(MPARAM)NULL,(MPARAM)NULL);
          if (iMsgLen <= 0)
            {
            sprintf(szMessage,"Message is too short, length = %u",iMsgLen);
            MessageBox(hwnd,szMessage);
            break;
            }
          if (astSubList[ulSubNumber].usMaxMsgLen < iMsgLen)
            {
            sprintf(szMessage,"Message is to long for defined subscriber, remove at least %u characters.",(iMsgLen - astSubList[ulSubNumber].usMaxMsgLen));
            MessageBox(hwnd,szMessage);
            break;
            }
          pNotify = (NOTIFYLST *)&pMessage->byData;
          pNotify->usSubCount = 1;
          pNotify->usGroupCount = 0;
          pNotify->usMsgLen = (USHORT)iMsgLen;
          pData = &pNotify->byData;
          iMsgLen = WinQueryDlgItemText(hwnd,NOTIFY_MESSAGE,(iMsgLen + 1),pData);
          pulSubNum = (ULONG *)(pData + iMsgLen);
          usSubCount = 0;
          for (iIndex = 0;iIndex < pNotify->usSubCount;iIndex++)
            {
            usSubCount++;
            *pulSubNum = (ULONG)ulSubNumber;
            pulSubNum++;
            }
          for (iIndex = 0;iIndex < pNotify->usGroupCount;iIndex++)
            {
            usSubCount++;
            *pulSubNum = (ULONG)ulGroupNumber;
            pulSubNum++;
            }
          usLength = ((sizeof(ULONG) * usSubCount) + (USHORT)iMsgLen);
          pMessage->cbDataSize = (usLength + sizeof(NOTIFYLST) - 1);
          if (Checked(hwnd,NOTIFY_CONTINUOUSLY))
            {
            pMessage->fMessageType = REQ_NOTIFY;
            pMessage->cbSize = (pMessage->cbDataSize + sizeof(MSG) - 1);
            bNotifyLoop = TRUE;
            pNotifyLoopMsg = pMessage;
            DosCreateThread(&tid,(PFNTHREAD)NotifyLoopThread,(ULONG)pMessage,0,8192);
            }
          else
            WinDismissDlg(hwnd,TRUE);
          break;
        case DID_CANCEL:
          if (bNotifyLoop)
            DosKillThread(tid);
          WinDismissDlg(hwnd,FALSE);
          break;
        default:
          return(WinDefDlgProc(hwnd,msg,mp1,mp2));
        }
      break;
    default:
      return(WinDefDlgProc(hwnd,msg,mp1,mp2));
    }
  return(FALSE);
  }
Пример #11
0
VOID gropFree(PGROPDATA pGrop)
{
  ULONG      ulRC;
  HMQ        hmq;
  TID        tid;

  ulRC = DosRequestMutexSem( pGrop->hmtxData, 4000 );
  if ( ulRC != NO_ERROR )
    debug( "DosRequestMutexSem(), rc = %u", ulRC );

  hmq = pGrop->hmq;
  tid = pGrop->tid;
  // Tune off all callback functions.
  memset( &pGrop->stCallback, 0, sizeof(GROPCALLBACK) );
  DosReleaseMutexSem( pGrop->hmtxData );

  if ( ( hmq == NULLHANDLE ) || !WinPostQueueMsg( hmq, WM_QUIT, 0, 0 ) )
  {
    debug( "Hm... have not a thread?..." );
    if ( pGrop->fFullscreen )
      _setMode( pGrop, pGrop->ulModeIdx, FALSE );

    if ( tid != ((TID)(-1)) )
    {
      debug( "WTF?! %p %d", pGrop, tid );
      DosKillThread( tid );
    }
  }
  else if ( DosWaitThread( &tid, DCWW_NOWAIT ) != NO_ERROR )
  {
    debug( "Wait thread semaphore" );
    ulRC = DosWaitEventSem( pGrop->hevReady, 4000 );
    if ( ulRC != NO_ERROR )
    {
      PVIDEOMODE pMode = &pGrop->stModes.pList[pGrop->stModes.ulDesktopMode];

      debug( "DosWaitEventSem(), rc = %u. Kill thread...", ulRC );
      DosKillThread( tid );

      if ( pGrop->hwndDT != NULLHANDLE )
      {
        debug( "Return to the desktop..." );
        pGrop->pVideoSys->fnSetMode( pGrop->pVSData, pMode, FALSE,
                                     pGrop->hwndDT, pGrop->hdcDT );
      }
    }
    else
    {
      debug( "Wait thread" );
      DosWaitThread( &tid, DCWW_WAIT );
    }
  }
  else
    debug( "Thread already terminated." );

  // Remove GROP object from the list.
  ulRC = DosRequestMutexSem( hmtxGropList, SEM_INDEFINITE_WAIT );
  if ( ulRC != NO_ERROR )
    debug( "DosRequestMutexSem(), rc = %u", ulRC );
  lnkseqRemove( &lsGropList, pGrop );
  DosReleaseMutexSem( hmtxGropList );

  DosCloseEventSem( pGrop->hevReady );
  debugFree( pGrop );
  debug( "Success." );
}
Пример #12
0
PGROPDATA gropNew(ULONG ulVideoSys, PGROPCALLBACK pCallback, PVOID pUser)
{
  ULONG                ulRC;
  PGROPDATA            pGrop;

  if ( hmtxGropList == NULLHANDLE )
  {
    debug( "Module was not initialized." );
    return NULL;
  }

  pGrop = debugCAlloc( 1, sizeof(GROPDATA) );
  if ( pGrop == NULL )
  {
    debug( "Not enough memory." );
    return NULL;
  }

  pGrop->ulVideoSysIdx = ulVideoSys;
  pGrop->stCallback = *pCallback;
  pGrop->pUser = pUser;
  do
  {
    ulRC = DosCreateEventSem( NULL, &pGrop->hevReady, DCE_POSTONE, FALSE );
    if ( ulRC != NO_ERROR )
    {
      debug( "DosCreateEventSem(), rc = %u.", ulRC );
      break;
    }

    pGrop->tid = _beginthread( wndThread, NULL, 65536, (PVOID)pGrop );
    if ( pGrop->tid == -1 )
    {
      debug( "_beginthread() failed." );
      break;
    }

    ulRC = DosWaitEventSem( pGrop->hevReady, 5000 );
    if ( ulRC == NO_ERROR )
    {
      if ( pGrop->pVideoSys == NULL )
        break;

      // Add new GROP object to the list.
      ulRC = DosRequestMutexSem( hmtxGropList, SEM_INDEFINITE_WAIT );
      if ( ulRC != NO_ERROR )
        debug( "DosRequestMutexSem(), rc = %u", ulRC );
      lnkseqAdd( &lsGropList, pGrop );
      DosReleaseMutexSem( hmtxGropList );

      debug( "Success." );
      return pGrop;
    }

    debug( "DosWaitEventSem(), rc = %u.", ulRC );
    DosKillThread( pGrop->tid );
  }
  while( FALSE );

  DosCloseEventSem( pGrop->hevReady );
  debugFree( pGrop );

  return NULL;
}