aboutsummaryrefslogtreecommitdiff
path: root/ncurses/tinfo/lib_data.c
blob: e84209d4022cfe7ff3f70da51775b394dcfc5443 (plain) (blame)
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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
/****************************************************************************
 * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 *     and: Thomas E. Dickey                        1996-on                 *
 ****************************************************************************/

/*
**	lib_data.c
**
**	Common data that may/may not be allocated, but is referenced globally
**
*/

#include <curses.priv.h>

MODULE_ID("$Id: lib_data.c,v 1.52 2008/08/23 22:16:15 tom Exp $")

/*
 * OS/2's native linker complains if we don't initialize public data when
 * constructing a dll (reported by J.J.G.Ripoll).
 */
#if USE_REENTRANT
NCURSES_EXPORT(WINDOW *)
NCURSES_PUBLIC_VAR(stdscr) (void)
{
    return SP ? SP->_stdscr : 0;
}
NCURSES_EXPORT(WINDOW *)
NCURSES_PUBLIC_VAR(curscr) (void)
{
    return SP ? SP->_curscr : 0;
}
NCURSES_EXPORT(WINDOW *)
NCURSES_PUBLIC_VAR(newscr) (void)
{
    return SP ? SP->_newscr : 0;
}
#else
NCURSES_EXPORT_VAR(WINDOW *) stdscr = 0;
NCURSES_EXPORT_VAR(WINDOW *) curscr = 0;
NCURSES_EXPORT_VAR(WINDOW *) newscr = 0;
#endif

NCURSES_EXPORT_VAR(SCREEN *) _nc_screen_chain = 0;

/*
 * The variable 'SP' will be defined as a function on systems that cannot link
 * data-only modules, since it is used in a lot of places within ncurses and we
 * cannot guarantee that any application will use any particular function.  We
 * put the WINDOW variables in this module, because it appears that any
 * application that uses them will also use 'SP'.
 *
 * This module intentionally does not reference other ncurses modules, to avoid
 * module coupling that increases the size of the executable.
 */
#if BROKEN_LINKER
static SCREEN *my_screen;

NCURSES_EXPORT(SCREEN *)
_nc_screen(void)
{
    return my_screen;
}

NCURSES_EXPORT(int)
_nc_alloc_screen(void)
{
    return ((my_screen = typeCalloc(SCREEN, 1)) != 0);
}

NCURSES_EXPORT(void)
_nc_set_screen(SCREEN *sp)
{
    my_screen = sp;
}

#else
NCURSES_EXPORT_VAR(SCREEN *) SP = NULL; /* Some linkers require initialized data... */
#endif
/* *INDENT-OFF* */
#define CHARS_0s { '\0' }

#define TGETENT_0 { 0L, FALSE, NULL, NULL, NULL }
#define TGETENT_0s { TGETENT_0, TGETENT_0, TGETENT_0, TGETENT_0 }

NCURSES_EXPORT_VAR(NCURSES_GLOBALS) _nc_globals = {
    0,				/* have_sigwinch */
    0,				/* cleanup_nested */

    FALSE,			/* init_signals */
    FALSE,			/* init_screen */

    NULL,			/* comp_sourcename */
    NULL,			/* comp_termtype */

    FALSE,			/* have_tic_directory */
    FALSE,			/* keep_tic_directory */
    TERMINFO,			/* tic_directory */

    NULL,			/* dbi_list */
    0,				/* dbi_size */

    NULL,			/* first_name */
    NULL,			/* keyname_table */

    0,				/* slk_format */

    NULL,			/* safeprint_buf */
    0,				/* safeprint_used */

    TGETENT_0s,			/* tgetent_cache */
    0,				/* tgetent_index */
    0,				/* tgetent_sequence */

    0,				/* _nc_windowlist */

#if USE_HOME_TERMINFO
    NULL,			/* home_terminfo */
#endif

#if !USE_SAFE_SPRINTF
    0,				/* safeprint_cols */
    0,				/* safeprint_rows */
#endif

#ifdef TRACE
    FALSE,			/* init_trace */
    CHARS_0s,			/* trace_fname */
    0,				/* trace_level */
    NULL,			/* trace_fp */

    NULL,			/* tracearg_buf */
    0,				/* tracearg_used */

    NULL,			/* tracebuf_ptr */
    0,				/* tracebuf_used */

    CHARS_0s,			/* tracechr_buf */

    NULL,			/* tracedmp_buf */
    0,				/* tracedmp_used */

    NULL,			/* tracetry_buf */
    0,				/* tracetry_used */

    { CHARS_0s, CHARS_0s },	/* traceatr_color_buf */
    0,				/* traceatr_color_sel */
    -1,				/* traceatr_color_last */

#endif /* TRACE */
#ifdef USE_PTHREADS
    PTHREAD_MUTEX_INITIALIZER,	/* mutex_curses */
    PTHREAD_MUTEX_INITIALIZER,	/* mutex_tst_tracef */
    PTHREAD_MUTEX_INITIALIZER,	/* mutex_tracef */
    0,				/* nested_tracef */
    0,				/* use_pthreads */
#endif
};

#define STACK_FRAME_0	{ { 0 }, 0 }
#define STACK_FRAME_0s	{ STACK_FRAME_0 }
#define NUM_VARS_0s	{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }

#define RIPOFF_0	{ 0,0,0 }
#define RIPOFF_0s	{ RIPOFF_0 }

NCURSES_EXPORT_VAR(NCURSES_PRESCREEN) _nc_prescreen = {
    TRUE,			/* use_env */
    FALSE,			/* filter_mode */
    A_NORMAL,			/* previous_attr */
    RIPOFF_0s,			/* ripoff */
    NULL,			/* rsp */
    {				/* tparm_state */
#ifdef TRACE
	NULL,			/* tname */
#endif
	NULL,			/* tparam_base */

	STACK_FRAME_0s,		/* stack */
	0,			/* stack_ptr */

	NULL,			/* out_buff */
	0,			/* out_size */
	0,			/* out_used */

	NULL,			/* fmt_buff */
	0,			/* fmt_size */

	NUM_VARS_0s,		/* dynamic_var */
	NUM_VARS_0s,		/* static_vars */
    },
    NULL,			/* saved_tty */
#if NCURSES_NO_PADDING
    FALSE,			/* flag to set if padding disabled  */
#endif
#if BROKEN_LINKER || USE_REENTRANT
    NULL,			/* real_acs_map */
    0,				/* LINES */
    0,				/* COLS */
    0,				/* cur_term */
#ifdef TRACE
    0L,				/* _outchars */
    NULL,			/* _tputs_trace */
#endif
#endif
};
/* *INDENT-ON* */

/******************************************************************************/
#ifdef USE_PTHREADS
static void
init_global_mutexes(void)
{
    static bool initialized = FALSE;

    if (!initialized) {
	initialized = TRUE;
	_nc_mutex_init(&_nc_globals.mutex_curses);
	_nc_mutex_init(&_nc_globals.mutex_tst_tracef);
	_nc_mutex_init(&_nc_globals.mutex_tracef);
    }
}

NCURSES_EXPORT(void)
_nc_init_pthreads(void)
{
    if (_nc_use_pthreads)
	return;
# if USE_WEAK_SYMBOLS
    if ((pthread_mutex_init) == 0)
	return;
    if ((pthread_mutex_lock) == 0)
	return;
    if ((pthread_mutex_unlock) == 0)
	return;
    if ((pthread_mutex_trylock) == 0)
	return;
    if ((pthread_mutexattr_settype) == 0)
	return;
# endif
    _nc_use_pthreads = 1;
    init_global_mutexes();
}

/*
 * Use recursive mutexes if we have them - they're part of Unix98.
 * For the cases where we do not, _nc_mutex_trylock() is used to avoid a
 * deadlock, at the expense of memory leaks and unexpected failures that
 * may not be handled by typical clients.
 *
 * FIXME - need configure check for PTHREAD_MUTEX_RECURSIVE, define it to
 * PTHREAD_MUTEX_NORMAL if not supported.
 */
NCURSES_EXPORT(void)
_nc_mutex_init(pthread_mutex_t * obj)
{
    pthread_mutexattr_t recattr;

    if (_nc_use_pthreads) {
	pthread_mutexattr_init(&recattr);
	pthread_mutexattr_settype(&recattr, PTHREAD_MUTEX_RECURSIVE);
	pthread_mutex_init(obj, &recattr);
    }
}

NCURSES_EXPORT(int)
_nc_mutex_lock(pthread_mutex_t * obj)
{
    if (_nc_use_pthreads == 0)
	return 0;
    return pthread_mutex_lock(obj);
}

NCURSES_EXPORT(int)
_nc_mutex_trylock(pthread_mutex_t * obj)
{
    if (_nc_use_pthreads == 0)
	return 0;
    return pthread_mutex_trylock(obj);
}

NCURSES_EXPORT(int)
_nc_mutex_unlock(pthread_mutex_t * obj)
{
    if (_nc_use_pthreads == 0)
	return 0;
    return pthread_mutex_unlock(obj);
}

#if USE_WEAK_SYMBOLS
/*
 * NB: sigprocmask(2) is global but pthread_sigmask(3p)
 * only for the calling thread.
 */
NCURSES_EXPORT(int)
_nc_sigprocmask(int how, const sigset_t * newmask, sigset_t * oldmask)
{
    if ((pthread_sigmask))
	return pthread_sigmask(how, newmask, oldmask);
    else
	return sigprocmask(how, newmask, oldmask);
}
#endif
#endif /* USE_PTHREADS */