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dashley |
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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclevent.c,v 1.1.1.1 2001/06/13 04:38:05 dtashley Exp $ */
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/*
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4 |
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* tclEvent.c --
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*
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6 |
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* This file implements some general event related interfaces including
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7 |
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* background errors, exit handlers, and the "vwait" and "update"
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* command procedures.
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*
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* Copyright (c) 1990-1994 The Regents of the University of California.
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* Copyright (c) 1994-1998 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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15 |
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*
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* RCS: @(#) $Id: tclevent.c,v 1.1.1.1 2001/06/13 04:38:05 dtashley Exp $
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*/
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18 |
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#include "tclInt.h"
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20 |
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#include "tclPort.h"
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21 |
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/*
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23 |
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* The data structure below is used to report background errors. One
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24 |
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* such structure is allocated for each error; it holds information
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25 |
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* about the interpreter and the error until bgerror can be invoked
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* later as an idle handler.
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27 |
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*/
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28 |
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29 |
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typedef struct BgError {
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30 |
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Tcl_Interp *interp; /* Interpreter in which error occurred. NULL
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31 |
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* means this error report has been cancelled
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32 |
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* (a previous report generated a break). */
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33 |
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char *errorMsg; /* Copy of the error message (the interp's
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34 |
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* result when the error occurred).
|
35 |
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* Malloc-ed. */
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36 |
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char *errorInfo; /* Value of the errorInfo variable
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37 |
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* (malloc-ed). */
|
38 |
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char *errorCode; /* Value of the errorCode variable
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39 |
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* (malloc-ed). */
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40 |
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struct BgError *nextPtr; /* Next in list of all pending error
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41 |
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* reports for this interpreter, or NULL
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42 |
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* for end of list. */
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43 |
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} BgError;
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44 |
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45 |
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/*
|
46 |
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* One of the structures below is associated with the "tclBgError"
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47 |
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* assoc data for each interpreter. It keeps track of the head and
|
48 |
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* tail of the list of pending background errors for the interpreter.
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49 |
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*/
|
50 |
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|
51 |
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typedef struct ErrAssocData {
|
52 |
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BgError *firstBgPtr; /* First in list of all background errors
|
53 |
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* waiting to be processed for this
|
54 |
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* interpreter (NULL if none). */
|
55 |
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BgError *lastBgPtr; /* Last in list of all background errors
|
56 |
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* waiting to be processed for this
|
57 |
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* interpreter (NULL if none). */
|
58 |
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} ErrAssocData;
|
59 |
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|
60 |
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/*
|
61 |
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* For each exit handler created with a call to Tcl_CreateExitHandler
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62 |
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* there is a structure of the following type:
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63 |
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*/
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64 |
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|
65 |
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typedef struct ExitHandler {
|
66 |
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Tcl_ExitProc *proc; /* Procedure to call when process exits. */
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67 |
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ClientData clientData; /* One word of information to pass to proc. */
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68 |
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struct ExitHandler *nextPtr;/* Next in list of all exit handlers for
|
69 |
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* this application, or NULL for end of list. */
|
70 |
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} ExitHandler;
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71 |
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|
72 |
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/*
|
73 |
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* There is both per-process and per-thread exit handlers.
|
74 |
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* The first list is controlled by a mutex. The other is in
|
75 |
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* thread local storage.
|
76 |
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*/
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77 |
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|
78 |
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static ExitHandler *firstExitPtr = NULL;
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79 |
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/* First in list of all exit handlers for
|
80 |
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* application. */
|
81 |
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TCL_DECLARE_MUTEX(exitMutex)
|
82 |
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|
83 |
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/*
|
84 |
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* This variable is set to 1 when Tcl_Finalize is called, and at the end of
|
85 |
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* its work, it is reset to 0. The variable is checked by TclInExit() to
|
86 |
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* allow different behavior for exit-time processing, e.g. in closing of
|
87 |
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* files and pipes.
|
88 |
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*/
|
89 |
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|
90 |
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static int inFinalize = 0;
|
91 |
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static int subsystemsInitialized = 0;
|
92 |
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|
93 |
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typedef struct ThreadSpecificData {
|
94 |
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ExitHandler *firstExitPtr; /* First in list of all exit handlers for
|
95 |
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* this thread. */
|
96 |
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int inExit; /* True when this thread is exiting. This
|
97 |
|
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* is used as a hack to decide to close
|
98 |
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* the standard channels. */
|
99 |
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Tcl_Obj *tclLibraryPath; /* Path(s) to the Tcl library */
|
100 |
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} ThreadSpecificData;
|
101 |
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static Tcl_ThreadDataKey dataKey;
|
102 |
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|
103 |
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/*
|
104 |
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* Prototypes for procedures referenced only in this file:
|
105 |
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*/
|
106 |
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|
107 |
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static void BgErrorDeleteProc _ANSI_ARGS_((ClientData clientData,
|
108 |
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Tcl_Interp *interp));
|
109 |
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static void HandleBgErrors _ANSI_ARGS_((ClientData clientData));
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110 |
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static char * VwaitVarProc _ANSI_ARGS_((ClientData clientData,
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111 |
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Tcl_Interp *interp, char *name1, char *name2,
|
112 |
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int flags));
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113 |
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|
114 |
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/*
|
115 |
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*----------------------------------------------------------------------
|
116 |
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*
|
117 |
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* Tcl_BackgroundError --
|
118 |
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*
|
119 |
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* This procedure is invoked to handle errors that occur in Tcl
|
120 |
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* commands that are invoked in "background" (e.g. from event or
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121 |
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* timer bindings).
|
122 |
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*
|
123 |
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* Results:
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124 |
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* None.
|
125 |
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*
|
126 |
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* Side effects:
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127 |
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* The command "bgerror" is invoked later as an idle handler to
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128 |
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* process the error, passing it the error message. If that fails,
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129 |
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* then an error message is output on stderr.
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130 |
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*
|
131 |
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|
*----------------------------------------------------------------------
|
132 |
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*/
|
133 |
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|
134 |
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void
|
135 |
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Tcl_BackgroundError(interp)
|
136 |
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Tcl_Interp *interp; /* Interpreter in which an error has
|
137 |
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|
* occurred. */
|
138 |
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{
|
139 |
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BgError *errPtr;
|
140 |
|
|
char *errResult, *varValue;
|
141 |
|
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ErrAssocData *assocPtr;
|
142 |
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int length;
|
143 |
|
|
|
144 |
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/*
|
145 |
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* The Tcl_AddErrorInfo call below (with an empty string) ensures that
|
146 |
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* errorInfo gets properly set. It's needed in cases where the error
|
147 |
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* came from a utility procedure like Tcl_GetVar instead of Tcl_Eval;
|
148 |
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* in these cases errorInfo still won't have been set when this
|
149 |
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* procedure is called.
|
150 |
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*/
|
151 |
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|
152 |
|
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Tcl_AddErrorInfo(interp, "");
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153 |
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|
154 |
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errResult = Tcl_GetStringFromObj(Tcl_GetObjResult(interp), &length);
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155 |
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|
156 |
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errPtr = (BgError *) ckalloc(sizeof(BgError));
|
157 |
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errPtr->interp = interp;
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158 |
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errPtr->errorMsg = (char *) ckalloc((unsigned) (length + 1));
|
159 |
|
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memcpy(errPtr->errorMsg, errResult, (size_t) (length + 1));
|
160 |
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varValue = Tcl_GetVar(interp, "errorInfo", TCL_GLOBAL_ONLY);
|
161 |
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if (varValue == NULL) {
|
162 |
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varValue = errPtr->errorMsg;
|
163 |
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|
}
|
164 |
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errPtr->errorInfo = (char *) ckalloc((unsigned) (strlen(varValue) + 1));
|
165 |
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strcpy(errPtr->errorInfo, varValue);
|
166 |
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varValue = Tcl_GetVar(interp, "errorCode", TCL_GLOBAL_ONLY);
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167 |
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if (varValue == NULL) {
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168 |
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varValue = "";
|
169 |
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}
|
170 |
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errPtr->errorCode = (char *) ckalloc((unsigned) (strlen(varValue) + 1));
|
171 |
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strcpy(errPtr->errorCode, varValue);
|
172 |
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errPtr->nextPtr = NULL;
|
173 |
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|
174 |
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assocPtr = (ErrAssocData *) Tcl_GetAssocData(interp, "tclBgError",
|
175 |
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(Tcl_InterpDeleteProc **) NULL);
|
176 |
|
|
if (assocPtr == NULL) {
|
177 |
|
|
|
178 |
|
|
/*
|
179 |
|
|
* This is the first time a background error has occurred in
|
180 |
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* this interpreter. Create associated data to keep track of
|
181 |
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* pending error reports.
|
182 |
|
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*/
|
183 |
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|
184 |
|
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assocPtr = (ErrAssocData *) ckalloc(sizeof(ErrAssocData));
|
185 |
|
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assocPtr->firstBgPtr = NULL;
|
186 |
|
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assocPtr->lastBgPtr = NULL;
|
187 |
|
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Tcl_SetAssocData(interp, "tclBgError", BgErrorDeleteProc,
|
188 |
|
|
(ClientData) assocPtr);
|
189 |
|
|
}
|
190 |
|
|
if (assocPtr->firstBgPtr == NULL) {
|
191 |
|
|
assocPtr->firstBgPtr = errPtr;
|
192 |
|
|
Tcl_DoWhenIdle(HandleBgErrors, (ClientData) assocPtr);
|
193 |
|
|
} else {
|
194 |
|
|
assocPtr->lastBgPtr->nextPtr = errPtr;
|
195 |
|
|
}
|
196 |
|
|
assocPtr->lastBgPtr = errPtr;
|
197 |
|
|
Tcl_ResetResult(interp);
|
198 |
|
|
}
|
199 |
|
|
|
200 |
|
|
/*
|
201 |
|
|
*----------------------------------------------------------------------
|
202 |
|
|
*
|
203 |
|
|
* HandleBgErrors --
|
204 |
|
|
*
|
205 |
|
|
* This procedure is invoked as an idle handler to process all of
|
206 |
|
|
* the accumulated background errors.
|
207 |
|
|
*
|
208 |
|
|
* Results:
|
209 |
|
|
* None.
|
210 |
|
|
*
|
211 |
|
|
* Side effects:
|
212 |
|
|
* Depends on what actions "bgerror" takes for the errors.
|
213 |
|
|
*
|
214 |
|
|
*----------------------------------------------------------------------
|
215 |
|
|
*/
|
216 |
|
|
|
217 |
|
|
static void
|
218 |
|
|
HandleBgErrors(clientData)
|
219 |
|
|
ClientData clientData; /* Pointer to ErrAssocData structure. */
|
220 |
|
|
{
|
221 |
|
|
Tcl_Interp *interp;
|
222 |
|
|
char *argv[2];
|
223 |
|
|
int code;
|
224 |
|
|
BgError *errPtr;
|
225 |
|
|
ErrAssocData *assocPtr = (ErrAssocData *) clientData;
|
226 |
|
|
Tcl_Channel errChannel;
|
227 |
|
|
|
228 |
|
|
Tcl_Preserve((ClientData) assocPtr);
|
229 |
|
|
|
230 |
|
|
while (assocPtr->firstBgPtr != NULL) {
|
231 |
|
|
interp = assocPtr->firstBgPtr->interp;
|
232 |
|
|
if (interp == NULL) {
|
233 |
|
|
goto doneWithInterp;
|
234 |
|
|
}
|
235 |
|
|
|
236 |
|
|
/*
|
237 |
|
|
* Restore important state variables to what they were at
|
238 |
|
|
* the time the error occurred.
|
239 |
|
|
*/
|
240 |
|
|
|
241 |
|
|
Tcl_SetVar(interp, "errorInfo", assocPtr->firstBgPtr->errorInfo,
|
242 |
|
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TCL_GLOBAL_ONLY);
|
243 |
|
|
Tcl_SetVar(interp, "errorCode", assocPtr->firstBgPtr->errorCode,
|
244 |
|
|
TCL_GLOBAL_ONLY);
|
245 |
|
|
|
246 |
|
|
/*
|
247 |
|
|
* Create and invoke the bgerror command.
|
248 |
|
|
*/
|
249 |
|
|
|
250 |
|
|
argv[0] = "bgerror";
|
251 |
|
|
argv[1] = assocPtr->firstBgPtr->errorMsg;
|
252 |
|
|
|
253 |
|
|
Tcl_AllowExceptions(interp);
|
254 |
|
|
Tcl_Preserve((ClientData) interp);
|
255 |
|
|
code = TclGlobalInvoke(interp, 2, argv, 0);
|
256 |
|
|
if (code == TCL_ERROR) {
|
257 |
|
|
|
258 |
|
|
/*
|
259 |
|
|
* If the interpreter is safe, we look for a hidden command
|
260 |
|
|
* named "bgerror" and call that with the error information.
|
261 |
|
|
* Otherwise, simply ignore the error. The rationale is that
|
262 |
|
|
* this could be an error caused by a malicious applet trying
|
263 |
|
|
* to cause an infinite barrage of error messages. The hidden
|
264 |
|
|
* "bgerror" command can be used by a security policy to
|
265 |
|
|
* interpose on such attacks and e.g. kill the applet after a
|
266 |
|
|
* few attempts.
|
267 |
|
|
*/
|
268 |
|
|
|
269 |
|
|
if (Tcl_IsSafe(interp)) {
|
270 |
|
|
Tcl_SavedResult save;
|
271 |
|
|
|
272 |
|
|
Tcl_SaveResult(interp, &save);
|
273 |
|
|
TclGlobalInvoke(interp, 2, argv, TCL_INVOKE_HIDDEN);
|
274 |
|
|
Tcl_RestoreResult(interp, &save);
|
275 |
|
|
|
276 |
|
|
goto doneWithInterp;
|
277 |
|
|
}
|
278 |
|
|
|
279 |
|
|
/*
|
280 |
|
|
* We have to get the error output channel at the latest possible
|
281 |
|
|
* time, because the eval (above) might have changed the channel.
|
282 |
|
|
*/
|
283 |
|
|
|
284 |
|
|
errChannel = Tcl_GetStdChannel(TCL_STDERR);
|
285 |
|
|
if (errChannel != (Tcl_Channel) NULL) {
|
286 |
|
|
char *string;
|
287 |
|
|
int len;
|
288 |
|
|
|
289 |
|
|
string = Tcl_GetStringFromObj(Tcl_GetObjResult(interp), &len);
|
290 |
|
|
if (strcmp(string, "\"bgerror\" is an invalid command name or ambiguous abbreviation") == 0) {
|
291 |
|
|
Tcl_WriteChars(errChannel, assocPtr->firstBgPtr->errorInfo, -1);
|
292 |
|
|
Tcl_WriteChars(errChannel, "\n", -1);
|
293 |
|
|
} else {
|
294 |
|
|
Tcl_WriteChars(errChannel,
|
295 |
|
|
"bgerror failed to handle background error.\n",
|
296 |
|
|
-1);
|
297 |
|
|
Tcl_WriteChars(errChannel, " Original error: ", -1);
|
298 |
|
|
Tcl_WriteChars(errChannel, assocPtr->firstBgPtr->errorMsg,
|
299 |
|
|
-1);
|
300 |
|
|
Tcl_WriteChars(errChannel, "\n", -1);
|
301 |
|
|
Tcl_WriteChars(errChannel, " Error in bgerror: ", -1);
|
302 |
|
|
Tcl_WriteChars(errChannel, string, len);
|
303 |
|
|
Tcl_WriteChars(errChannel, "\n", -1);
|
304 |
|
|
}
|
305 |
|
|
Tcl_Flush(errChannel);
|
306 |
|
|
}
|
307 |
|
|
} else if (code == TCL_BREAK) {
|
308 |
|
|
|
309 |
|
|
/*
|
310 |
|
|
* Break means cancel any remaining error reports for this
|
311 |
|
|
* interpreter.
|
312 |
|
|
*/
|
313 |
|
|
|
314 |
|
|
for (errPtr = assocPtr->firstBgPtr; errPtr != NULL;
|
315 |
|
|
errPtr = errPtr->nextPtr) {
|
316 |
|
|
if (errPtr->interp == interp) {
|
317 |
|
|
errPtr->interp = NULL;
|
318 |
|
|
}
|
319 |
|
|
}
|
320 |
|
|
}
|
321 |
|
|
|
322 |
|
|
/*
|
323 |
|
|
* Discard the command and the information about the error report.
|
324 |
|
|
*/
|
325 |
|
|
|
326 |
|
|
doneWithInterp:
|
327 |
|
|
|
328 |
|
|
if (assocPtr->firstBgPtr) {
|
329 |
|
|
ckfree(assocPtr->firstBgPtr->errorMsg);
|
330 |
|
|
ckfree(assocPtr->firstBgPtr->errorInfo);
|
331 |
|
|
ckfree(assocPtr->firstBgPtr->errorCode);
|
332 |
|
|
errPtr = assocPtr->firstBgPtr->nextPtr;
|
333 |
|
|
ckfree((char *) assocPtr->firstBgPtr);
|
334 |
|
|
assocPtr->firstBgPtr = errPtr;
|
335 |
|
|
}
|
336 |
|
|
|
337 |
|
|
if (interp != NULL) {
|
338 |
|
|
Tcl_Release((ClientData) interp);
|
339 |
|
|
}
|
340 |
|
|
}
|
341 |
|
|
assocPtr->lastBgPtr = NULL;
|
342 |
|
|
|
343 |
|
|
Tcl_Release((ClientData) assocPtr);
|
344 |
|
|
}
|
345 |
|
|
|
346 |
|
|
/*
|
347 |
|
|
*----------------------------------------------------------------------
|
348 |
|
|
*
|
349 |
|
|
* BgErrorDeleteProc --
|
350 |
|
|
*
|
351 |
|
|
* This procedure is associated with the "tclBgError" assoc data
|
352 |
|
|
* for an interpreter; it is invoked when the interpreter is
|
353 |
|
|
* deleted in order to free the information assoicated with any
|
354 |
|
|
* pending error reports.
|
355 |
|
|
*
|
356 |
|
|
* Results:
|
357 |
|
|
* None.
|
358 |
|
|
*
|
359 |
|
|
* Side effects:
|
360 |
|
|
* Background error information is freed: if there were any
|
361 |
|
|
* pending error reports, they are cancelled.
|
362 |
|
|
*
|
363 |
|
|
*----------------------------------------------------------------------
|
364 |
|
|
*/
|
365 |
|
|
|
366 |
|
|
static void
|
367 |
|
|
BgErrorDeleteProc(clientData, interp)
|
368 |
|
|
ClientData clientData; /* Pointer to ErrAssocData structure. */
|
369 |
|
|
Tcl_Interp *interp; /* Interpreter being deleted. */
|
370 |
|
|
{
|
371 |
|
|
ErrAssocData *assocPtr = (ErrAssocData *) clientData;
|
372 |
|
|
BgError *errPtr;
|
373 |
|
|
|
374 |
|
|
while (assocPtr->firstBgPtr != NULL) {
|
375 |
|
|
errPtr = assocPtr->firstBgPtr;
|
376 |
|
|
assocPtr->firstBgPtr = errPtr->nextPtr;
|
377 |
|
|
ckfree(errPtr->errorMsg);
|
378 |
|
|
ckfree(errPtr->errorInfo);
|
379 |
|
|
ckfree(errPtr->errorCode);
|
380 |
|
|
ckfree((char *) errPtr);
|
381 |
|
|
}
|
382 |
|
|
Tcl_CancelIdleCall(HandleBgErrors, (ClientData) assocPtr);
|
383 |
|
|
Tcl_EventuallyFree((ClientData) assocPtr, TCL_DYNAMIC);
|
384 |
|
|
}
|
385 |
|
|
|
386 |
|
|
/*
|
387 |
|
|
*----------------------------------------------------------------------
|
388 |
|
|
*
|
389 |
|
|
* Tcl_CreateExitHandler --
|
390 |
|
|
*
|
391 |
|
|
* Arrange for a given procedure to be invoked just before the
|
392 |
|
|
* application exits.
|
393 |
|
|
*
|
394 |
|
|
* Results:
|
395 |
|
|
* None.
|
396 |
|
|
*
|
397 |
|
|
* Side effects:
|
398 |
|
|
* Proc will be invoked with clientData as argument when the
|
399 |
|
|
* application exits.
|
400 |
|
|
*
|
401 |
|
|
*----------------------------------------------------------------------
|
402 |
|
|
*/
|
403 |
|
|
|
404 |
|
|
void
|
405 |
|
|
Tcl_CreateExitHandler(proc, clientData)
|
406 |
|
|
Tcl_ExitProc *proc; /* Procedure to invoke. */
|
407 |
|
|
ClientData clientData; /* Arbitrary value to pass to proc. */
|
408 |
|
|
{
|
409 |
|
|
ExitHandler *exitPtr;
|
410 |
|
|
|
411 |
|
|
exitPtr = (ExitHandler *) ckalloc(sizeof(ExitHandler));
|
412 |
|
|
exitPtr->proc = proc;
|
413 |
|
|
exitPtr->clientData = clientData;
|
414 |
|
|
Tcl_MutexLock(&exitMutex);
|
415 |
|
|
exitPtr->nextPtr = firstExitPtr;
|
416 |
|
|
firstExitPtr = exitPtr;
|
417 |
|
|
Tcl_MutexUnlock(&exitMutex);
|
418 |
|
|
}
|
419 |
|
|
|
420 |
|
|
/*
|
421 |
|
|
*----------------------------------------------------------------------
|
422 |
|
|
*
|
423 |
|
|
* Tcl_DeleteExitHandler --
|
424 |
|
|
*
|
425 |
|
|
* This procedure cancels an existing exit handler matching proc
|
426 |
|
|
* and clientData, if such a handler exits.
|
427 |
|
|
*
|
428 |
|
|
* Results:
|
429 |
|
|
* None.
|
430 |
|
|
*
|
431 |
|
|
* Side effects:
|
432 |
|
|
* If there is an exit handler corresponding to proc and clientData
|
433 |
|
|
* then it is cancelled; if no such handler exists then nothing
|
434 |
|
|
* happens.
|
435 |
|
|
*
|
436 |
|
|
*----------------------------------------------------------------------
|
437 |
|
|
*/
|
438 |
|
|
|
439 |
|
|
void
|
440 |
|
|
Tcl_DeleteExitHandler(proc, clientData)
|
441 |
|
|
Tcl_ExitProc *proc; /* Procedure that was previously registered. */
|
442 |
|
|
ClientData clientData; /* Arbitrary value to pass to proc. */
|
443 |
|
|
{
|
444 |
|
|
ExitHandler *exitPtr, *prevPtr;
|
445 |
|
|
|
446 |
|
|
Tcl_MutexLock(&exitMutex);
|
447 |
|
|
for (prevPtr = NULL, exitPtr = firstExitPtr; exitPtr != NULL;
|
448 |
|
|
prevPtr = exitPtr, exitPtr = exitPtr->nextPtr) {
|
449 |
|
|
if ((exitPtr->proc == proc)
|
450 |
|
|
&& (exitPtr->clientData == clientData)) {
|
451 |
|
|
if (prevPtr == NULL) {
|
452 |
|
|
firstExitPtr = exitPtr->nextPtr;
|
453 |
|
|
} else {
|
454 |
|
|
prevPtr->nextPtr = exitPtr->nextPtr;
|
455 |
|
|
}
|
456 |
|
|
ckfree((char *) exitPtr);
|
457 |
|
|
break;
|
458 |
|
|
}
|
459 |
|
|
}
|
460 |
|
|
Tcl_MutexUnlock(&exitMutex);
|
461 |
|
|
return;
|
462 |
|
|
}
|
463 |
|
|
|
464 |
|
|
/*
|
465 |
|
|
*----------------------------------------------------------------------
|
466 |
|
|
*
|
467 |
|
|
* Tcl_CreateThreadExitHandler --
|
468 |
|
|
*
|
469 |
|
|
* Arrange for a given procedure to be invoked just before the
|
470 |
|
|
* current thread exits.
|
471 |
|
|
*
|
472 |
|
|
* Results:
|
473 |
|
|
* None.
|
474 |
|
|
*
|
475 |
|
|
* Side effects:
|
476 |
|
|
* Proc will be invoked with clientData as argument when the
|
477 |
|
|
* application exits.
|
478 |
|
|
*
|
479 |
|
|
*----------------------------------------------------------------------
|
480 |
|
|
*/
|
481 |
|
|
|
482 |
|
|
void
|
483 |
|
|
Tcl_CreateThreadExitHandler(proc, clientData)
|
484 |
|
|
Tcl_ExitProc *proc; /* Procedure to invoke. */
|
485 |
|
|
ClientData clientData; /* Arbitrary value to pass to proc. */
|
486 |
|
|
{
|
487 |
|
|
ExitHandler *exitPtr;
|
488 |
|
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
489 |
|
|
|
490 |
|
|
exitPtr = (ExitHandler *) ckalloc(sizeof(ExitHandler));
|
491 |
|
|
exitPtr->proc = proc;
|
492 |
|
|
exitPtr->clientData = clientData;
|
493 |
|
|
exitPtr->nextPtr = tsdPtr->firstExitPtr;
|
494 |
|
|
tsdPtr->firstExitPtr = exitPtr;
|
495 |
|
|
}
|
496 |
|
|
|
497 |
|
|
/*
|
498 |
|
|
*----------------------------------------------------------------------
|
499 |
|
|
*
|
500 |
|
|
* Tcl_DeleteThreadExitHandler --
|
501 |
|
|
*
|
502 |
|
|
* This procedure cancels an existing exit handler matching proc
|
503 |
|
|
* and clientData, if such a handler exits.
|
504 |
|
|
*
|
505 |
|
|
* Results:
|
506 |
|
|
* None.
|
507 |
|
|
*
|
508 |
|
|
* Side effects:
|
509 |
|
|
* If there is an exit handler corresponding to proc and clientData
|
510 |
|
|
* then it is cancelled; if no such handler exists then nothing
|
511 |
|
|
* happens.
|
512 |
|
|
*
|
513 |
|
|
*----------------------------------------------------------------------
|
514 |
|
|
*/
|
515 |
|
|
|
516 |
|
|
void
|
517 |
|
|
Tcl_DeleteThreadExitHandler(proc, clientData)
|
518 |
|
|
Tcl_ExitProc *proc; /* Procedure that was previously registered. */
|
519 |
|
|
ClientData clientData; /* Arbitrary value to pass to proc. */
|
520 |
|
|
{
|
521 |
|
|
ExitHandler *exitPtr, *prevPtr;
|
522 |
|
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
523 |
|
|
|
524 |
|
|
for (prevPtr = NULL, exitPtr = tsdPtr->firstExitPtr; exitPtr != NULL;
|
525 |
|
|
prevPtr = exitPtr, exitPtr = exitPtr->nextPtr) {
|
526 |
|
|
if ((exitPtr->proc == proc)
|
527 |
|
|
&& (exitPtr->clientData == clientData)) {
|
528 |
|
|
if (prevPtr == NULL) {
|
529 |
|
|
tsdPtr->firstExitPtr = exitPtr->nextPtr;
|
530 |
|
|
} else {
|
531 |
|
|
prevPtr->nextPtr = exitPtr->nextPtr;
|
532 |
|
|
}
|
533 |
|
|
ckfree((char *) exitPtr);
|
534 |
|
|
return;
|
535 |
|
|
}
|
536 |
|
|
}
|
537 |
|
|
}
|
538 |
|
|
|
539 |
|
|
/*
|
540 |
|
|
*----------------------------------------------------------------------
|
541 |
|
|
*
|
542 |
|
|
* Tcl_Exit --
|
543 |
|
|
*
|
544 |
|
|
* This procedure is called to terminate the application.
|
545 |
|
|
*
|
546 |
|
|
* Results:
|
547 |
|
|
* None.
|
548 |
|
|
*
|
549 |
|
|
* Side effects:
|
550 |
|
|
* All existing exit handlers are invoked, then the application
|
551 |
|
|
* ends.
|
552 |
|
|
*
|
553 |
|
|
*----------------------------------------------------------------------
|
554 |
|
|
*/
|
555 |
|
|
|
556 |
|
|
void
|
557 |
|
|
Tcl_Exit(status)
|
558 |
|
|
int status; /* Exit status for application; typically
|
559 |
|
|
* 0 for normal return, 1 for error return. */
|
560 |
|
|
{
|
561 |
|
|
Tcl_Finalize();
|
562 |
|
|
TclpExit(status);
|
563 |
|
|
}
|
564 |
|
|
|
565 |
|
|
/*
|
566 |
|
|
*-------------------------------------------------------------------------
|
567 |
|
|
*
|
568 |
|
|
* TclSetLibraryPath --
|
569 |
|
|
*
|
570 |
|
|
* Set the path that will be used for searching for init.tcl and
|
571 |
|
|
* encodings when an interp is being created.
|
572 |
|
|
*
|
573 |
|
|
* Results:
|
574 |
|
|
* None.
|
575 |
|
|
*
|
576 |
|
|
* Side effects:
|
577 |
|
|
* Changing the library path will affect what directories are
|
578 |
|
|
* examined when looking for encodings for all interps from that
|
579 |
|
|
* point forward.
|
580 |
|
|
*
|
581 |
|
|
* The refcount of the new library path is incremented and the
|
582 |
|
|
* refcount of the old path is decremented.
|
583 |
|
|
*
|
584 |
|
|
*-------------------------------------------------------------------------
|
585 |
|
|
*/
|
586 |
|
|
|
587 |
|
|
void
|
588 |
|
|
TclSetLibraryPath(pathPtr)
|
589 |
|
|
Tcl_Obj *pathPtr; /* A Tcl list object whose elements are
|
590 |
|
|
* the new library path. */
|
591 |
|
|
{
|
592 |
|
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
593 |
|
|
|
594 |
|
|
if (pathPtr != NULL) {
|
595 |
|
|
Tcl_IncrRefCount(pathPtr);
|
596 |
|
|
}
|
597 |
|
|
if (tsdPtr->tclLibraryPath != NULL) {
|
598 |
|
|
Tcl_DecrRefCount(tsdPtr->tclLibraryPath);
|
599 |
|
|
}
|
600 |
|
|
tsdPtr->tclLibraryPath = pathPtr;
|
601 |
|
|
}
|
602 |
|
|
|
603 |
|
|
/*
|
604 |
|
|
*-------------------------------------------------------------------------
|
605 |
|
|
*
|
606 |
|
|
* TclGetLibraryPath --
|
607 |
|
|
*
|
608 |
|
|
* Return a Tcl list object whose elements are the library path.
|
609 |
|
|
* The caller should not modify the contents of the returned object.
|
610 |
|
|
*
|
611 |
|
|
* Results:
|
612 |
|
|
* As above.
|
613 |
|
|
*
|
614 |
|
|
* Side effects:
|
615 |
|
|
* None.
|
616 |
|
|
*
|
617 |
|
|
*-------------------------------------------------------------------------
|
618 |
|
|
*/
|
619 |
|
|
|
620 |
|
|
Tcl_Obj *
|
621 |
|
|
TclGetLibraryPath()
|
622 |
|
|
{
|
623 |
|
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
624 |
|
|
return tsdPtr->tclLibraryPath;
|
625 |
|
|
}
|
626 |
|
|
|
627 |
|
|
/*
|
628 |
|
|
*-------------------------------------------------------------------------
|
629 |
|
|
*
|
630 |
|
|
* TclInitSubsystems --
|
631 |
|
|
*
|
632 |
|
|
* Initialize various subsytems in Tcl. This should be called the
|
633 |
|
|
* first time an interp is created, or before any of the subsystems
|
634 |
|
|
* are used. This function ensures an order for the initialization
|
635 |
|
|
* of subsystems:
|
636 |
|
|
*
|
637 |
|
|
* 1. that cannot be initialized in lazy order because they are
|
638 |
|
|
* mutually dependent.
|
639 |
|
|
*
|
640 |
|
|
* 2. so that they can be finalized in a known order w/o causing
|
641 |
|
|
* the subsequent re-initialization of a subsystem in the act of
|
642 |
|
|
* shutting down another.
|
643 |
|
|
*
|
644 |
|
|
* Results:
|
645 |
|
|
* None.
|
646 |
|
|
*
|
647 |
|
|
* Side effects:
|
648 |
|
|
* Varied, see the respective initialization routines.
|
649 |
|
|
*
|
650 |
|
|
*-------------------------------------------------------------------------
|
651 |
|
|
*/
|
652 |
|
|
|
653 |
|
|
void
|
654 |
|
|
TclInitSubsystems(argv0)
|
655 |
|
|
CONST char *argv0; /* Name of executable from argv[0] to main()
|
656 |
|
|
* in native multi-byte encoding. */
|
657 |
|
|
{
|
658 |
|
|
ThreadSpecificData *tsdPtr;
|
659 |
|
|
|
660 |
|
|
if (inFinalize != 0) {
|
661 |
|
|
panic("TclInitSubsystems called while finalizing");
|
662 |
|
|
}
|
663 |
|
|
|
664 |
|
|
/*
|
665 |
|
|
* Grab the thread local storage pointer before doing anything because
|
666 |
|
|
* the initialization routines will be registering exit handlers.
|
667 |
|
|
* We use this pointer to detect if this is the first time this
|
668 |
|
|
* thread has created an interpreter.
|
669 |
|
|
*/
|
670 |
|
|
|
671 |
|
|
tsdPtr = (ThreadSpecificData *) TclThreadDataKeyGet(&dataKey);
|
672 |
|
|
|
673 |
|
|
if (subsystemsInitialized == 0) {
|
674 |
|
|
/*
|
675 |
|
|
* Double check inside the mutex. There are definitly calls
|
676 |
|
|
* back into this routine from some of the procedures below.
|
677 |
|
|
*/
|
678 |
|
|
|
679 |
|
|
TclpInitLock();
|
680 |
|
|
if (subsystemsInitialized == 0) {
|
681 |
|
|
/*
|
682 |
|
|
* Have to set this bit here to avoid deadlock with the
|
683 |
|
|
* routines below us that call into TclInitSubsystems.
|
684 |
|
|
*/
|
685 |
|
|
|
686 |
|
|
subsystemsInitialized = 1;
|
687 |
|
|
|
688 |
|
|
tclExecutableName = NULL;
|
689 |
|
|
|
690 |
|
|
/*
|
691 |
|
|
* Initialize locks used by the memory allocators before anything
|
692 |
|
|
* interesting happens so we can use the allocators in the
|
693 |
|
|
* implementation of self-initializing locks.
|
694 |
|
|
*/
|
695 |
|
|
#if USE_TCLALLOC
|
696 |
|
|
TclInitAlloc(); /* process wide mutex init */
|
697 |
|
|
#endif
|
698 |
|
|
#ifdef TCL_MEM_DEBUG
|
699 |
|
|
TclInitDbCkalloc(); /* process wide mutex init */
|
700 |
|
|
#endif
|
701 |
|
|
|
702 |
|
|
TclpInitPlatform(); /* creates signal handler(s) */
|
703 |
|
|
TclInitObjSubsystem(); /* register obj types, create mutexes */
|
704 |
|
|
TclInitIOSubsystem(); /* inits a tsd key (noop) */
|
705 |
|
|
TclInitEncodingSubsystem(); /* process wide encoding init */
|
706 |
|
|
TclInitNamespaceSubsystem(); /* register ns obj type (mutexed) */
|
707 |
|
|
}
|
708 |
|
|
TclpInitUnlock();
|
709 |
|
|
}
|
710 |
|
|
|
711 |
|
|
if (tsdPtr == NULL) {
|
712 |
|
|
/*
|
713 |
|
|
* First time this thread has created an interpreter.
|
714 |
|
|
* We fetch the key again just in case no exit handlers were
|
715 |
|
|
* registered by this point.
|
716 |
|
|
*/
|
717 |
|
|
|
718 |
|
|
(void) TCL_TSD_INIT(&dataKey);
|
719 |
|
|
TclInitNotifier();
|
720 |
|
|
}
|
721 |
|
|
}
|
722 |
|
|
|
723 |
|
|
/*
|
724 |
|
|
*----------------------------------------------------------------------
|
725 |
|
|
*
|
726 |
|
|
* Tcl_Finalize --
|
727 |
|
|
*
|
728 |
|
|
* Shut down Tcl. First calls registered exit handlers, then
|
729 |
|
|
* carefully shuts down various subsystems.
|
730 |
|
|
* Called by Tcl_Exit or when the Tcl shared library is being
|
731 |
|
|
* unloaded.
|
732 |
|
|
*
|
733 |
|
|
* Results:
|
734 |
|
|
* None.
|
735 |
|
|
*
|
736 |
|
|
* Side effects:
|
737 |
|
|
* Varied, see the respective finalization routines.
|
738 |
|
|
*
|
739 |
|
|
*----------------------------------------------------------------------
|
740 |
|
|
*/
|
741 |
|
|
|
742 |
|
|
void
|
743 |
|
|
Tcl_Finalize()
|
744 |
|
|
{
|
745 |
|
|
ExitHandler *exitPtr;
|
746 |
|
|
ThreadSpecificData *tsdPtr;
|
747 |
|
|
|
748 |
|
|
TclpInitLock();
|
749 |
|
|
tsdPtr = TCL_TSD_INIT(&dataKey);
|
750 |
|
|
if (subsystemsInitialized != 0) {
|
751 |
|
|
subsystemsInitialized = 0;
|
752 |
|
|
|
753 |
|
|
/*
|
754 |
|
|
* Invoke exit handlers first.
|
755 |
|
|
*/
|
756 |
|
|
|
757 |
|
|
Tcl_MutexLock(&exitMutex);
|
758 |
|
|
inFinalize = 1;
|
759 |
|
|
for (exitPtr = firstExitPtr; exitPtr != NULL; exitPtr = firstExitPtr) {
|
760 |
|
|
/*
|
761 |
|
|
* Be careful to remove the handler from the list before
|
762 |
|
|
* invoking its callback. This protects us against
|
763 |
|
|
* double-freeing if the callback should call
|
764 |
|
|
* Tcl_DeleteExitHandler on itself.
|
765 |
|
|
*/
|
766 |
|
|
|
767 |
|
|
firstExitPtr = exitPtr->nextPtr;
|
768 |
|
|
Tcl_MutexUnlock(&exitMutex);
|
769 |
|
|
(*exitPtr->proc)(exitPtr->clientData);
|
770 |
|
|
ckfree((char *) exitPtr);
|
771 |
|
|
Tcl_MutexLock(&exitMutex);
|
772 |
|
|
}
|
773 |
|
|
firstExitPtr = NULL;
|
774 |
|
|
Tcl_MutexUnlock(&exitMutex);
|
775 |
|
|
|
776 |
|
|
/*
|
777 |
|
|
* Clean up the library path now, before we invalidate thread-local
|
778 |
|
|
* storage.
|
779 |
|
|
*/
|
780 |
|
|
if (tsdPtr->tclLibraryPath != NULL) {
|
781 |
|
|
Tcl_DecrRefCount(tsdPtr->tclLibraryPath);
|
782 |
|
|
tsdPtr->tclLibraryPath = NULL;
|
783 |
|
|
}
|
784 |
|
|
|
785 |
|
|
/*
|
786 |
|
|
* Clean up after the current thread now, after exit handlers.
|
787 |
|
|
* In particular, the testexithandler command sets up something
|
788 |
|
|
* that writes to standard output, which gets closed.
|
789 |
|
|
* Note that there is no thread-local storage after this call.
|
790 |
|
|
*/
|
791 |
|
|
|
792 |
|
|
Tcl_FinalizeThread();
|
793 |
|
|
|
794 |
|
|
/*
|
795 |
|
|
* Now finalize the Tcl execution environment. Note that this
|
796 |
|
|
* must be done after the exit handlers, because there are
|
797 |
|
|
* order dependencies.
|
798 |
|
|
*/
|
799 |
|
|
|
800 |
|
|
TclFinalizeCompExecEnv();
|
801 |
|
|
TclFinalizeEnvironment();
|
802 |
|
|
|
803 |
|
|
TclFinalizeEncodingSubsystem();
|
804 |
|
|
|
805 |
|
|
if (tclExecutableName != NULL) {
|
806 |
|
|
ckfree(tclExecutableName);
|
807 |
|
|
tclExecutableName = NULL;
|
808 |
|
|
}
|
809 |
|
|
if (tclNativeExecutableName != NULL) {
|
810 |
|
|
ckfree(tclNativeExecutableName);
|
811 |
|
|
tclNativeExecutableName = NULL;
|
812 |
|
|
}
|
813 |
|
|
if (tclDefaultEncodingDir != NULL) {
|
814 |
|
|
ckfree(tclDefaultEncodingDir);
|
815 |
|
|
tclDefaultEncodingDir = NULL;
|
816 |
|
|
}
|
817 |
|
|
|
818 |
|
|
Tcl_SetPanicProc(NULL);
|
819 |
|
|
|
820 |
|
|
/*
|
821 |
|
|
* Free synchronization objects. There really should only be one
|
822 |
|
|
* thread alive at this moment.
|
823 |
|
|
*/
|
824 |
|
|
|
825 |
|
|
TclFinalizeSynchronization();
|
826 |
|
|
|
827 |
|
|
/*
|
828 |
|
|
* We defer unloading of packages until very late
|
829 |
|
|
* to avoid memory access issues. Both exit callbacks and
|
830 |
|
|
* synchronization variables may be stored in packages.
|
831 |
|
|
*/
|
832 |
|
|
|
833 |
|
|
TclFinalizeLoad();
|
834 |
|
|
|
835 |
|
|
/*
|
836 |
|
|
* There shouldn't be any malloc'ed memory after this.
|
837 |
|
|
*/
|
838 |
|
|
|
839 |
|
|
TclFinalizeMemorySubsystem();
|
840 |
|
|
inFinalize = 0;
|
841 |
|
|
}
|
842 |
|
|
TclpInitUnlock();
|
843 |
|
|
}
|
844 |
|
|
|
845 |
|
|
/*
|
846 |
|
|
*----------------------------------------------------------------------
|
847 |
|
|
*
|
848 |
|
|
* Tcl_FinalizeThread --
|
849 |
|
|
*
|
850 |
|
|
* Runs the exit handlers to allow Tcl to clean up its state
|
851 |
|
|
* about a particular thread.
|
852 |
|
|
*
|
853 |
|
|
* Results:
|
854 |
|
|
* None.
|
855 |
|
|
*
|
856 |
|
|
* Side effects:
|
857 |
|
|
* Varied, see the respective finalization routines.
|
858 |
|
|
*
|
859 |
|
|
*----------------------------------------------------------------------
|
860 |
|
|
*/
|
861 |
|
|
|
862 |
|
|
void
|
863 |
|
|
Tcl_FinalizeThread()
|
864 |
|
|
{
|
865 |
|
|
ExitHandler *exitPtr;
|
866 |
|
|
ThreadSpecificData *tsdPtr =
|
867 |
|
|
(ThreadSpecificData *)TclThreadDataKeyGet(&dataKey);
|
868 |
|
|
|
869 |
|
|
if (tsdPtr != NULL) {
|
870 |
|
|
/*
|
871 |
|
|
* Invoke thread exit handlers first.
|
872 |
|
|
*/
|
873 |
|
|
|
874 |
|
|
tsdPtr->inExit = 1;
|
875 |
|
|
for (exitPtr = tsdPtr->firstExitPtr; exitPtr != NULL;
|
876 |
|
|
exitPtr = tsdPtr->firstExitPtr) {
|
877 |
|
|
/*
|
878 |
|
|
* Be careful to remove the handler from the list before invoking
|
879 |
|
|
* its callback. This protects us against double-freeing if the
|
880 |
|
|
* callback should call Tcl_DeleteThreadExitHandler on itself.
|
881 |
|
|
*/
|
882 |
|
|
|
883 |
|
|
tsdPtr->firstExitPtr = exitPtr->nextPtr;
|
884 |
|
|
(*exitPtr->proc)(exitPtr->clientData);
|
885 |
|
|
ckfree((char *) exitPtr);
|
886 |
|
|
}
|
887 |
|
|
TclFinalizeIOSubsystem();
|
888 |
|
|
TclFinalizeNotifier();
|
889 |
|
|
|
890 |
|
|
/*
|
891 |
|
|
* Blow away all thread local storage blocks.
|
892 |
|
|
*/
|
893 |
|
|
|
894 |
|
|
TclFinalizeThreadData();
|
895 |
|
|
}
|
896 |
|
|
}
|
897 |
|
|
|
898 |
|
|
/*
|
899 |
|
|
*----------------------------------------------------------------------
|
900 |
|
|
*
|
901 |
|
|
* TclInExit --
|
902 |
|
|
*
|
903 |
|
|
* Determines if we are in the middle of exit-time cleanup.
|
904 |
|
|
*
|
905 |
|
|
* Results:
|
906 |
|
|
* If we are in the middle of exiting, 1, otherwise 0.
|
907 |
|
|
*
|
908 |
|
|
* Side effects:
|
909 |
|
|
* None.
|
910 |
|
|
*
|
911 |
|
|
*----------------------------------------------------------------------
|
912 |
|
|
*/
|
913 |
|
|
|
914 |
|
|
int
|
915 |
|
|
TclInExit()
|
916 |
|
|
{
|
917 |
|
|
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
918 |
|
|
return tsdPtr->inExit;
|
919 |
|
|
}
|
920 |
|
|
|
921 |
|
|
/*
|
922 |
|
|
*----------------------------------------------------------------------
|
923 |
|
|
*
|
924 |
|
|
* Tcl_VwaitObjCmd --
|
925 |
|
|
*
|
926 |
|
|
* This procedure is invoked to process the "vwait" Tcl command.
|
927 |
|
|
* See the user documentation for details on what it does.
|
928 |
|
|
*
|
929 |
|
|
* Results:
|
930 |
|
|
* A standard Tcl result.
|
931 |
|
|
*
|
932 |
|
|
* Side effects:
|
933 |
|
|
* See the user documentation.
|
934 |
|
|
*
|
935 |
|
|
*----------------------------------------------------------------------
|
936 |
|
|
*/
|
937 |
|
|
|
938 |
|
|
/* ARGSUSED */
|
939 |
|
|
int
|
940 |
|
|
Tcl_VwaitObjCmd(clientData, interp, objc, objv)
|
941 |
|
|
ClientData clientData; /* Not used. */
|
942 |
|
|
Tcl_Interp *interp; /* Current interpreter. */
|
943 |
|
|
int objc; /* Number of arguments. */
|
944 |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
945 |
|
|
{
|
946 |
|
|
int done, foundEvent;
|
947 |
|
|
char *nameString;
|
948 |
|
|
|
949 |
|
|
if (objc != 2) {
|
950 |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "name");
|
951 |
|
|
return TCL_ERROR;
|
952 |
|
|
}
|
953 |
|
|
nameString = Tcl_GetString(objv[1]);
|
954 |
|
|
if (Tcl_TraceVar(interp, nameString,
|
955 |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
|
956 |
|
|
VwaitVarProc, (ClientData) &done) != TCL_OK) {
|
957 |
|
|
return TCL_ERROR;
|
958 |
|
|
};
|
959 |
|
|
done = 0;
|
960 |
|
|
foundEvent = 1;
|
961 |
|
|
while (!done && foundEvent) {
|
962 |
|
|
foundEvent = Tcl_DoOneEvent(TCL_ALL_EVENTS);
|
963 |
|
|
}
|
964 |
|
|
Tcl_UntraceVar(interp, nameString,
|
965 |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
|
966 |
|
|
VwaitVarProc, (ClientData) &done);
|
967 |
|
|
|
968 |
|
|
/*
|
969 |
|
|
* Clear out the interpreter's result, since it may have been set
|
970 |
|
|
* by event handlers.
|
971 |
|
|
*/
|
972 |
|
|
|
973 |
|
|
Tcl_ResetResult(interp);
|
974 |
|
|
if (!foundEvent) {
|
975 |
|
|
Tcl_AppendResult(interp, "can't wait for variable \"", nameString,
|
976 |
|
|
"\": would wait forever", (char *) NULL);
|
977 |
|
|
return TCL_ERROR;
|
978 |
|
|
}
|
979 |
|
|
return TCL_OK;
|
980 |
|
|
}
|
981 |
|
|
|
982 |
|
|
/* ARGSUSED */
|
983 |
|
|
static char *
|
984 |
|
|
VwaitVarProc(clientData, interp, name1, name2, flags)
|
985 |
|
|
ClientData clientData; /* Pointer to integer to set to 1. */
|
986 |
|
|
Tcl_Interp *interp; /* Interpreter containing variable. */
|
987 |
|
|
char *name1; /* Name of variable. */
|
988 |
|
|
char *name2; /* Second part of variable name. */
|
989 |
|
|
int flags; /* Information about what happened. */
|
990 |
|
|
{
|
991 |
|
|
int *donePtr = (int *) clientData;
|
992 |
|
|
|
993 |
|
|
*donePtr = 1;
|
994 |
|
|
return (char *) NULL;
|
995 |
|
|
}
|
996 |
|
|
|
997 |
|
|
/*
|
998 |
|
|
*----------------------------------------------------------------------
|
999 |
|
|
*
|
1000 |
|
|
* Tcl_UpdateObjCmd --
|
1001 |
|
|
*
|
1002 |
|
|
* This procedure is invoked to process the "update" Tcl command.
|
1003 |
|
|
* See the user documentation for details on what it does.
|
1004 |
|
|
*
|
1005 |
|
|
* Results:
|
1006 |
|
|
* A standard Tcl result.
|
1007 |
|
|
*
|
1008 |
|
|
* Side effects:
|
1009 |
|
|
* See the user documentation.
|
1010 |
|
|
*
|
1011 |
|
|
*----------------------------------------------------------------------
|
1012 |
|
|
*/
|
1013 |
|
|
|
1014 |
|
|
/* ARGSUSED */
|
1015 |
|
|
int
|
1016 |
|
|
Tcl_UpdateObjCmd(clientData, interp, objc, objv)
|
1017 |
|
|
ClientData clientData; /* Not used. */
|
1018 |
|
|
Tcl_Interp *interp; /* Current interpreter. */
|
1019 |
|
|
int objc; /* Number of arguments. */
|
1020 |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
1021 |
|
|
{
|
1022 |
|
|
int optionIndex;
|
1023 |
|
|
int flags = 0; /* Initialized to avoid compiler warning. */
|
1024 |
|
|
static char *updateOptions[] = {"idletasks", (char *) NULL};
|
1025 |
|
|
enum updateOptions {REGEXP_IDLETASKS};
|
1026 |
|
|
|
1027 |
|
|
if (objc == 1) {
|
1028 |
|
|
flags = TCL_ALL_EVENTS|TCL_DONT_WAIT;
|
1029 |
|
|
} else if (objc == 2) {
|
1030 |
|
|
if (Tcl_GetIndexFromObj(interp, objv[1], updateOptions,
|
1031 |
|
|
"option", 0, &optionIndex) != TCL_OK) {
|
1032 |
|
|
return TCL_ERROR;
|
1033 |
|
|
}
|
1034 |
|
|
switch ((enum updateOptions) optionIndex) {
|
1035 |
|
|
case REGEXP_IDLETASKS: {
|
1036 |
|
|
flags = TCL_WINDOW_EVENTS|TCL_IDLE_EVENTS|TCL_DONT_WAIT;
|
1037 |
|
|
break;
|
1038 |
|
|
}
|
1039 |
|
|
default: {
|
1040 |
|
|
panic("Tcl_UpdateObjCmd: bad option index to UpdateOptions");
|
1041 |
|
|
}
|
1042 |
|
|
}
|
1043 |
|
|
} else {
|
1044 |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "?idletasks?");
|
1045 |
|
|
return TCL_ERROR;
|
1046 |
|
|
}
|
1047 |
|
|
|
1048 |
|
|
while (Tcl_DoOneEvent(flags) != 0) {
|
1049 |
|
|
/* Empty loop body */
|
1050 |
|
|
}
|
1051 |
|
|
|
1052 |
|
|
/*
|
1053 |
|
|
* Must clear the interpreter's result because event handlers could
|
1054 |
|
|
* have executed commands.
|
1055 |
|
|
*/
|
1056 |
|
|
|
1057 |
|
|
Tcl_ResetResult(interp);
|
1058 |
|
|
return TCL_OK;
|
1059 |
|
|
}
|
1060 |
|
|
|
1061 |
|
|
|
1062 |
|
|
/* $History: tclevent.c $
|
1063 |
|
|
*
|
1064 |
|
|
* ***************** Version 1 *****************
|
1065 |
|
|
* User: Dtashley Date: 1/02/01 Time: 1:26a
|
1066 |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tcl Base
|
1067 |
|
|
* Initial check-in.
|
1068 |
|
|
*/
|
1069 |
|
|
|
1070 |
|
|
/* End of TCLEVENT.C */ |