1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/***********************************************************************/
/* */
/* MLTk, Tcl/Tk interface of OCaml */
/* */
/* Francois Rouaix, Francois Pessaux, Jun Furuse and Pierre Weis */
/* projet Cristal, INRIA Rocquencourt */
/* Jacques Garrigue, Kyoto University RIMS */
/* */
/* Copyright 2002 Institut National de Recherche en Informatique et */
/* en Automatique and Kyoto University. All rights reserved. */
/* This file is distributed under the terms of the GNU Library */
/* General Public License, with the special exception on linking */
/* described in file LICENSE found in the OCaml source tree. */
/* */
/***********************************************************************/
/* $Id$ */
#include <string.h>
#include <tcl.h>
#include <tk.h>
#include <mlvalues.h>
#include <memory.h>
#include <alloc.h>
#include <callback.h>
#include <signals.h>
#include <fail.h>
#ifdef HAS_UNISTD
#include <unistd.h> /* for R_OK */
#endif
#include "camltk.h"
#ifndef R_OK
#define R_OK 4
#endif
/*
* Dealing with signals: when a signal handler is defined in OCaml,
* the actual execution of the signal handler upon reception of the
* signal is delayed until we are sure we are out of the GC.
* If a signal occurs during the MainLoop, we would have to wait
* the next event for the handler to be invoked.
* The following function will invoke a pending signal handler if any,
* and we put in on a regular timer.
*/
#define SIGNAL_INTERVAL 300
int signal_events = 0; /* do we have a pending timer */
void invoke_pending_caml_signals (ClientData clientdata)
{
signal_events = 0;
caml_enter_blocking_section(); /* triggers signal handling */
/* Rearm timer */
Tcl_CreateTimerHandler(SIGNAL_INTERVAL, invoke_pending_caml_signals, NULL);
signal_events = 1;
caml_leave_blocking_section();
}
/* Now the real Tk stuff */
Tk_Window cltk_mainWindow;
/* In slave mode, the interpreter *already* exists */
int cltk_slave_mode = 0;
/* Initialisation, based on tkMain.c */
CAMLprim value camltk_opentk(value argv)
{
CAMLparam1(argv);
CAMLlocal1(tmp);
const char *argv0;
/* argv must contain argv[0], the application command name */
tmp = Val_unit;
if ( argv == Val_int(0) ){
caml_failwith("camltk_opentk: argv is empty");
}
argv0 = String_val( Field( argv, 0 ) );
if (!cltk_slave_mode) {
/* Create an interpreter, dies if error */
#if TCL_MAJOR_VERSION >= 8
Tcl_FindExecutable(String_val(argv0));
#endif
cltclinterp = Tcl_CreateInterp();
{
/* Register cltclinterp for use in other related extensions */
const value *interp = caml_named_value("cltclinterp");
if (interp != NULL)
Store_field(*interp,0,caml_copy_nativeint((intnat)cltclinterp));
}
if (Tcl_Init(cltclinterp) != TCL_OK)
tk_error(Tcl_GetStringResult(cltclinterp));
Tcl_SetVar(cltclinterp, "argv0", String_val (argv0), TCL_GLOBAL_ONLY);
{ /* Sets argv */
int argc = 0;
tmp = Field(argv, 1); /* starts from argv[1] */
while ( tmp != Val_int(0) ) {
argc++;
tmp = Field(tmp, 1);
}
if( argc != 0 ){
int i;
char *args;
const char **tkargv;
char argcstr[256]; /* string of argc */
tkargv = (const char**)caml_stat_alloc(sizeof( char* ) * argc );
tmp = Field(argv, 1); /* starts from argv[1] */
i = 0;
while ( tmp != Val_int(0) ) {
tkargv[i] = String_val(Field(tmp, 0));
tmp = Field(tmp, 1);
i++;
}
sprintf( argcstr, "%d", argc );
Tcl_SetVar(cltclinterp, "argc", argcstr, TCL_GLOBAL_ONLY);
args = Tcl_Merge(argc, (const char *const*)tkargv); /* args must be freed by Tcl_Free */
Tcl_SetVar(cltclinterp, "argv", args, TCL_GLOBAL_ONLY);
Tcl_Free(args);
caml_stat_free( tkargv );
}
}
if (Tk_Init(cltclinterp) != TCL_OK)
tk_error(Tcl_GetStringResult(cltclinterp));
/* Retrieve the main window */
cltk_mainWindow = Tk_MainWindow(cltclinterp);
if (NULL == cltk_mainWindow)
tk_error(Tcl_GetStringResult(cltclinterp));
Tk_GeometryRequest(cltk_mainWindow,200,200);
}
/* Create the camlcallback command */
Tcl_CreateCommand(cltclinterp,
CAMLCB, CamlCBCmd,
(ClientData)NULL,(Tcl_CmdDeleteProc *)NULL);
/* This is required by "unknown" and thus autoload */
Tcl_SetVar(cltclinterp, "tcl_interactive", "0", TCL_GLOBAL_ONLY);
/* Our hack for implementing break in callbacks */
Tcl_SetVar(cltclinterp, "BreakBindingsSequence", "0", TCL_GLOBAL_ONLY);
/* Load the traditional rc file */
{
char *home = getenv("HOME");
if (home != NULL) {
char *f = caml_stat_alloc(strlen(home)+strlen(RCNAME)+2);
f[0]='\0';
strcat(f, home);
strcat(f, "/");
strcat(f, RCNAME);
if (0 == access(f,R_OK))
if (TCL_OK != Tcl_EvalFile(cltclinterp,f)) {
caml_stat_free(f);
tk_error(Tcl_GetStringResult(cltclinterp));
};
caml_stat_free(f);
}
}
CAMLreturn(Val_unit);
}
CAMLprim value camltk_finalize(value unit) /* ML */
{
Tcl_Finalize();
return Val_unit;
}
|
