if ((infoPtr->watchMask & TCL_READABLE) &&
		(WaitForRead(infoPtr, 0) >= 0)) {
	    needEvent = 1;
	}

	if (needEvent) {
	    infoPtr->flags |= PIPE_PENDING;
	    evPtr = (PipeEvent *)ckalloc(sizeof(PipeEvent));
	    evPtr->header.proc = PipeEventProc;
	    evPtr->infoPtr = infoPtr;
	    Tcl_QueueEvent((Tcl_Event *) evPtr, TCL_QUEUE_TAIL);
	}
    }
}


TclFile
TclWinMakeFile(
    HANDLE handle)		/* Type-specific data. */
{
    WinFile *filePtr;

    filePtr = (WinFile *)ckalloc(sizeof(WinFile));
    filePtr->type = WIN_FILE;
    filePtr->handle = handle;

    return (TclFile)filePtr;
}

/*

    TclFile writeFile,		/* If non-null, gives the file for writing. */
    TclFile errorFile,		/* If non-null, gives the file where errors
				 * can be read. */
    int numPids,		/* The number of pids in the pid array. */
    Tcl_Pid *pidPtr)		/* An array of process identifiers. */
{
    char channelName[16 + TCL_INTEGER_SPACE];
    PipeInfo *infoPtr = (PipeInfo *)ckalloc(sizeof(PipeInfo));

    PipeInit();

    infoPtr->watchMask = 0;
    infoPtr->flags = 0;
    infoPtr->readFlags = 0;
    infoPtr->readFile = readFile;

     */

    chanTypePtr = Tcl_GetChannelType(chan);
    if (chanTypePtr != &pipeChannelType) {
	return;
    }

    pipePtr = (PipeInfo *)Tcl_GetChannelInstanceData(chan);
    TclNewObj(pidsObj);
    for (i = 0; i < pipePtr->numPids; i++) {
	Tcl_ListObjAppendElement(NULL, pidsObj,
		Tcl_NewWideIntObj((unsigned)
			TclpGetPid(pipePtr->pidPtr[i])));
	Tcl_DetachPids(1, &pipePtr->pidPtr[i]);
    }

	     * Reallocate the buffer to be large enough to hold the data.
	     */

	    if (infoPtr->writeBuf) {
		ckfree(infoPtr->writeBuf);
	    }
	    infoPtr->writeBufLen = toWrite;
	    infoPtr->writeBuf = (char *)ckalloc(toWrite);
	}
	memcpy(infoPtr->writeBuf, buf, toWrite);
	infoPtr->toWrite = toWrite;
	ResetEvent(infoPtr->writable);
	TclPipeThreadSignal(&infoPtr->writeTI);
	bytesWritten = toWrite;
    } else {

 */

void
TclWinAddProcess(
    void *hProcess,		/* Handle to process */
    unsigned long id)		/* Global process identifier */
{
    ProcInfo *procPtr = (ProcInfo*)ckalloc(sizeof(ProcInfo));

    PipeInit();

    procPtr->hProcess = hProcess;
    procPtr->dwProcessId = id;
    Tcl_MutexLock(&pipeMutex);
    procPtr->nextPtr = procList;

static int
WaitForRead(
    PipeInfo *infoPtr,		/* Pipe state. */
    int blocking)		/* Indicates whether call should be blocking
				 * or not. */
{
    DWORD timeout, count;
    HANDLE *handle = (HANDLE *)((WinFile *) infoPtr->readFile)->handle;

    while (1) {
	/*
	 * Synchronize with the reader thread.
	 */

	/* avoid blocking if pipe-thread exited */

TclPipeThreadCreateTI(
    TclPipeThreadInfo **pipeTIPtr,
    ClientData clientData,
    HANDLE wakeEvent)
{
    TclPipeThreadInfo *pipeTI;
#ifndef _PTI_USE_CKALLOC
    pipeTI = (TclPipeThreadInfo *)malloc(sizeof(TclPipeThreadInfo));
#else
    pipeTI = (TclPipeThreadInfo *)ckalloc(sizeof(TclPipeThreadInfo));
#endif /* !_PTI_USE_CKALLOC */
    pipeTI->evControl = CreateEvent(NULL, FALSE, FALSE, NULL);
    pipeTI->state = PTI_STATE_IDLE;
    pipeTI->clientData = clientData;
    pipeTI->evWakeUp = wakeEvent;
    return (*pipeTIPtr = pipeTI);
}