Tcl Source Code

    Tcl_Channel stderrChannel;	/* Static variable for the stderr channel. */
    int stderrInitialized;
    Tcl_Encoding binaryEncoding;
} ThreadSpecificData;

static Tcl_ThreadDataKey dataKey;

/*
 * Structure to record a close callback. One such record exists for
 * each close callback registered for a channel.
 */

typedef struct CloseCallback {
    Tcl_CloseProc *proc;		/* The procedure to call. */
    ClientData clientData;		/* Arbitrary one-word data to pass
					 * to the callback. */
    struct CloseCallback *nextPtr;	/* For chaining close callbacks. */
} CloseCallback;

/*
 * Static functions in this file:
 */

static ChannelBuffer *	AllocChannelBuffer(int length);
static void		ChannelTimerProc(ClientData clientData);
static int		CheckChannelErrors(ChannelState *statePtr,

    statePtr = ((Channel *) chan)->state;
    for (cbPtr = statePtr->closeCbPtr, cbPrevPtr = NULL;
	    cbPtr != NULL; cbPtr = cbPtr->nextPtr) {
	if ((cbPtr->proc == proc) && (cbPtr->clientData == clientData)) {
	    if (cbPrevPtr == NULL) {
		statePtr->closeCbPtr = cbPtr->nextPtr;
	    } else {
		cbPrevPtr->nextPtr = cbPtr->nextPtr;
	    }
	    ckfree((char *) cbPtr);
	    break;
	} else {
	    cbPrevPtr = cbPtr;
	}
    }

/*
 * The following defines the *default* buffer size for channels.
 */

#define CHANNELBUFFER_DEFAULT_SIZE	(1024 * 4)





/* Foward declaration */




struct CloseCallback;



/*
 * The following structure describes the information saved from a call to
 * "fileevent". This is used later when the event being waited for to invoke
 * the saved script in the interpreter designed in this record.
 */

    int outEofChar;		/* If nonzero, append this to the channel when
				 * it is closed if it is open for writing. */
    int unreportedError;	/* Non-zero if an error report was deferred
				 * because it happened in the background. The
				 * value is the POSIX error code. */
    int refCount;		/* How many interpreters hold references to
				 * this IO channel? */
    struct CloseCallback *closeCbPtr;
				/* Callbacks registered to be called when the
				 * channel is closed. */
    char *outputStage;		/* Temporary staging buffer used when
				 * translating EOL before converting from
				 * UTF-8 to external form. */
    ChannelBuffer *curOutPtr;	/* Current output buffer being filled. */
    ChannelBuffer *outQueueHead;/* Points at first buffer in output queue. */
    ChannelBuffer *outQueueTail;/* Points at last buffer in output queue. */