source: downloads/tcl8.5.2/unix/tclXtTest.c @ 25

/* 
 * tclXtTest.c --
 *
 *      Contains commands for Xt notifier specific tests on Unix.
 *
 * Copyright (c) 1997 by Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclXtTest.c,v 1.6 2005/11/02 23:26:50 dkf Exp $
 */

#include <X11/Intrinsic.h>
#include "tcl.h"

static int      TesteventloopCmd(ClientData clientData,
                    Tcl_Interp *interp, int argc, CONST char **argv);
extern void     InitNotifier(void);

/*
 *----------------------------------------------------------------------
 *
 * Tclxttest_Init --
 *
 *      This procedure performs application-specific initialization. Most
 *      applications, especially those that incorporate additional packages,
 *      will have their own version of this procedure.
 *
 * Results:
 *      Returns a standard Tcl completion code, and leaves an error message in
 *      the interp's result if an error occurs.
 *
 * Side effects:
 *      Depends on the startup script.
 *
 *----------------------------------------------------------------------
 */

int
Tclxttest_Init(
    Tcl_Interp *interp)         /* Interpreter for application. */
{
    if (Tcl_InitStubs(interp, TCL_VERSION, 0) == NULL) {
        return TCL_ERROR;
    }
    XtToolkitInitialize();
    InitNotifier();
    Tcl_CreateCommand(interp, "testeventloop", TesteventloopCmd,
            (ClientData) 0, NULL);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TesteventloopCmd --
 *
 *      This procedure implements the "testeventloop" command. It is used to
 *      test the Tcl notifier from an "external" event loop (i.e. not
 *      Tcl_DoOneEvent()).
 *
 * Results:
 *      A standard Tcl result.
 *
 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */

static int
TesteventloopCmd(
    ClientData clientData,      /* Not used. */
    Tcl_Interp *interp,         /* Current interpreter. */
    int argc,                   /* Number of arguments. */
    CONST char **argv)          /* Argument strings. */
{
    static int *framePtr = NULL;/* Pointer to integer on stack frame of
                                 * innermost invocation of the "wait"
                                 * subcommand. */

   if (argc < 2) {
        Tcl_AppendResult(interp, "wrong # arguments: should be \"", argv[0],
                " option ... \"", NULL);
        return TCL_ERROR;
    }
    if (strcmp(argv[1], "done") == 0) {
        *framePtr = 1;
    } else if (strcmp(argv[1], "wait") == 0) {
        int *oldFramePtr;
        int done;
        int oldMode = Tcl_SetServiceMode(TCL_SERVICE_ALL);

        /*
         * Save the old stack frame pointer and set up the current frame.
         */

        oldFramePtr = framePtr;
        framePtr = &done;

        /*
         * Enter an Xt event loop until the flag changes. Note that we do not
         * explicitly call Tcl_ServiceEvent().
         */

        done = 0;
        while (!done) {
            XtAppProcessEvent(TclSetAppContext(NULL), XtIMAll);
        }
        (void) Tcl_SetServiceMode(oldMode);
        framePtr = oldFramePtr;
    } else {
        Tcl_AppendResult(interp, "bad option \"", argv[1],
                "\": must be done or wait", NULL);
        return TCL_ERROR;
    }
    return TCL_OK;
}