150276Speter/**************************************************************************** 2176187Srafan * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. * 350276Speter * * 450276Speter * Permission is hereby granted, free of charge, to any person obtaining a * 550276Speter * copy of this software and associated documentation files (the * 650276Speter * "Software"), to deal in the Software without restriction, including * 750276Speter * without limitation the rights to use, copy, modify, merge, publish, * 850276Speter * distribute, distribute with modifications, sublicense, and/or sell * 950276Speter * copies of the Software, and to permit persons to whom the Software is * 1050276Speter * furnished to do so, subject to the following conditions: * 1150276Speter * * 1250276Speter * The above copyright notice and this permission notice shall be included * 1350276Speter * in all copies or substantial portions of the Software. * 1450276Speter * * 1550276Speter * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 1650276Speter * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 1750276Speter * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 1850276Speter * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 1950276Speter * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 2050276Speter * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 2150276Speter * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 2250276Speter * * 2350276Speter * Except as contained in this notice, the name(s) of the above copyright * 2450276Speter * holders shall not be used in advertising or otherwise to promote the * 2550276Speter * sale, use or other dealings in this Software without prior written * 2650276Speter * authorization. * 2750276Speter ****************************************************************************/ 2850276Speter 2950276Speter/**************************************************************************** 3050276Speter * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 3150276Speter * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32166124Srafan * and: Thomas E. Dickey 1996-on * 3350276Speter ****************************************************************************/ 3450276Speter 3550276Speter/* 3650276Speter** lib_data.c 3750276Speter** 3850276Speter** Common data that may/may not be allocated, but is referenced globally 3950276Speter** 4050276Speter*/ 4150276Speter 4250276Speter#include <curses.priv.h> 4350276Speter 44184989SrafanMODULE_ID("$Id: lib_data.c,v 1.52 2008/08/23 22:16:15 tom Exp $") 4550276Speter 4650276Speter/* 4750276Speter * OS/2's native linker complains if we don't initialize public data when 4850276Speter * constructing a dll (reported by J.J.G.Ripoll). 4950276Speter */ 50174993Srafan#if USE_REENTRANT 51174993SrafanNCURSES_EXPORT(WINDOW *) 52174993SrafanNCURSES_PUBLIC_VAR(stdscr) (void) 53174993Srafan{ 54174993Srafan return SP ? SP->_stdscr : 0; 55174993Srafan} 56174993SrafanNCURSES_EXPORT(WINDOW *) 57174993SrafanNCURSES_PUBLIC_VAR(curscr) (void) 58174993Srafan{ 59174993Srafan return SP ? SP->_curscr : 0; 60174993Srafan} 61174993SrafanNCURSES_EXPORT(WINDOW *) 62174993SrafanNCURSES_PUBLIC_VAR(newscr) (void) 63174993Srafan{ 64174993Srafan return SP ? SP->_newscr : 0; 65174993Srafan} 66174993Srafan#else 67166124SrafanNCURSES_EXPORT_VAR(WINDOW *) stdscr = 0; 68166124SrafanNCURSES_EXPORT_VAR(WINDOW *) curscr = 0; 69166124SrafanNCURSES_EXPORT_VAR(WINDOW *) newscr = 0; 70174993Srafan#endif 7150276Speter 7276726SpeterNCURSES_EXPORT_VAR(SCREEN *) _nc_screen_chain = 0; 7350276Speter 7450276Speter/* 7550276Speter * The variable 'SP' will be defined as a function on systems that cannot link 7650276Speter * data-only modules, since it is used in a lot of places within ncurses and we 7750276Speter * cannot guarantee that any application will use any particular function. We 7850276Speter * put the WINDOW variables in this module, because it appears that any 7950276Speter * application that uses them will also use 'SP'. 8050276Speter * 8150276Speter * This module intentionally does not reference other ncurses modules, to avoid 8250276Speter * module coupling that increases the size of the executable. 8350276Speter */ 8450276Speter#if BROKEN_LINKER 85166124Srafanstatic SCREEN *my_screen; 8650276Speter 8776726SpeterNCURSES_EXPORT(SCREEN *) 8876726Speter_nc_screen(void) 8950276Speter{ 9076726Speter return my_screen; 9150276Speter} 9250276Speter 9376726SpeterNCURSES_EXPORT(int) 9476726Speter_nc_alloc_screen(void) 9550276Speter{ 9676726Speter return ((my_screen = typeCalloc(SCREEN, 1)) != 0); 9750276Speter} 9850276Speter 9976726SpeterNCURSES_EXPORT(void) 100166124Srafan_nc_set_screen(SCREEN *sp) 10150276Speter{ 10276726Speter my_screen = sp; 10350276Speter} 10476726Speter 10550276Speter#else 106166124SrafanNCURSES_EXPORT_VAR(SCREEN *) SP = NULL; /* Some linkers require initialized data... */ 10750276Speter#endif 108174993Srafan/* *INDENT-OFF* */ 109174993Srafan#define CHARS_0s { '\0' } 110174993Srafan 111174993Srafan#define TGETENT_0 { 0L, FALSE, NULL, NULL, NULL } 112178866Srafan#define TGETENT_0s { TGETENT_0, TGETENT_0, TGETENT_0, TGETENT_0 } 113174993Srafan 114174993SrafanNCURSES_EXPORT_VAR(NCURSES_GLOBALS) _nc_globals = { 115174993Srafan 0, /* have_sigwinch */ 116174993Srafan 0, /* cleanup_nested */ 117174993Srafan 118174993Srafan FALSE, /* init_signals */ 119174993Srafan FALSE, /* init_screen */ 120174993Srafan 121174993Srafan NULL, /* comp_sourcename */ 122174993Srafan NULL, /* comp_termtype */ 123174993Srafan 124174993Srafan FALSE, /* have_tic_directory */ 125174993Srafan FALSE, /* keep_tic_directory */ 126174993Srafan TERMINFO, /* tic_directory */ 127174993Srafan 128174993Srafan NULL, /* dbi_list */ 129174993Srafan 0, /* dbi_size */ 130174993Srafan 131174993Srafan NULL, /* first_name */ 132174993Srafan NULL, /* keyname_table */ 133174993Srafan 134176187Srafan 0, /* slk_format */ 135176187Srafan 136174993Srafan NULL, /* safeprint_buf */ 137174993Srafan 0, /* safeprint_used */ 138174993Srafan 139174993Srafan TGETENT_0s, /* tgetent_cache */ 140174993Srafan 0, /* tgetent_index */ 141174993Srafan 0, /* tgetent_sequence */ 142174993Srafan 143178866Srafan 0, /* _nc_windowlist */ 144178866Srafan 145174993Srafan#if USE_HOME_TERMINFO 146174993Srafan NULL, /* home_terminfo */ 147174993Srafan#endif 148174993Srafan 149174993Srafan#if !USE_SAFE_SPRINTF 150174993Srafan 0, /* safeprint_cols */ 151174993Srafan 0, /* safeprint_rows */ 152174993Srafan#endif 153174993Srafan 154174993Srafan#ifdef TRACE 155174993Srafan FALSE, /* init_trace */ 156174993Srafan CHARS_0s, /* trace_fname */ 157174993Srafan 0, /* trace_level */ 158174993Srafan NULL, /* trace_fp */ 159174993Srafan 160174993Srafan NULL, /* tracearg_buf */ 161174993Srafan 0, /* tracearg_used */ 162174993Srafan 163174993Srafan NULL, /* tracebuf_ptr */ 164174993Srafan 0, /* tracebuf_used */ 165174993Srafan 166174993Srafan CHARS_0s, /* tracechr_buf */ 167174993Srafan 168174993Srafan NULL, /* tracedmp_buf */ 169174993Srafan 0, /* tracedmp_used */ 170174993Srafan 171174993Srafan NULL, /* tracetry_buf */ 172174993Srafan 0, /* tracetry_used */ 173174993Srafan 174174993Srafan { CHARS_0s, CHARS_0s }, /* traceatr_color_buf */ 175174993Srafan 0, /* traceatr_color_sel */ 176174993Srafan -1, /* traceatr_color_last */ 177174993Srafan 178174993Srafan#endif /* TRACE */ 179174993Srafan#ifdef USE_PTHREADS 180184989Srafan PTHREAD_MUTEX_INITIALIZER, /* mutex_curses */ 181174993Srafan PTHREAD_MUTEX_INITIALIZER, /* mutex_tst_tracef */ 182174993Srafan PTHREAD_MUTEX_INITIALIZER, /* mutex_tracef */ 183174993Srafan 0, /* nested_tracef */ 184184989Srafan 0, /* use_pthreads */ 185174993Srafan#endif 186174993Srafan}; 187174993Srafan 188174993Srafan#define STACK_FRAME_0 { { 0 }, 0 } 189174993Srafan#define STACK_FRAME_0s { STACK_FRAME_0 } 190174993Srafan#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 } 191174993Srafan 192176187Srafan#define RIPOFF_0 { 0,0,0 } 193174993Srafan#define RIPOFF_0s { RIPOFF_0 } 194174993Srafan 195174993SrafanNCURSES_EXPORT_VAR(NCURSES_PRESCREEN) _nc_prescreen = { 196174993Srafan TRUE, /* use_env */ 197174993Srafan FALSE, /* filter_mode */ 198174993Srafan A_NORMAL, /* previous_attr */ 199174993Srafan RIPOFF_0s, /* ripoff */ 200174993Srafan NULL, /* rsp */ 201174993Srafan { /* tparm_state */ 202174993Srafan#ifdef TRACE 203174993Srafan NULL, /* tname */ 204174993Srafan#endif 205174993Srafan NULL, /* tparam_base */ 206174993Srafan 207174993Srafan STACK_FRAME_0s, /* stack */ 208174993Srafan 0, /* stack_ptr */ 209174993Srafan 210174993Srafan NULL, /* out_buff */ 211174993Srafan 0, /* out_size */ 212174993Srafan 0, /* out_used */ 213174993Srafan 214174993Srafan NULL, /* fmt_buff */ 215174993Srafan 0, /* fmt_size */ 216174993Srafan 217174993Srafan NUM_VARS_0s, /* dynamic_var */ 218174993Srafan NUM_VARS_0s, /* static_vars */ 219174993Srafan }, 220174993Srafan NULL, /* saved_tty */ 221184989Srafan#if NCURSES_NO_PADDING 222184989Srafan FALSE, /* flag to set if padding disabled */ 223184989Srafan#endif 224174993Srafan#if BROKEN_LINKER || USE_REENTRANT 225174993Srafan NULL, /* real_acs_map */ 226174993Srafan 0, /* LINES */ 227174993Srafan 0, /* COLS */ 228184989Srafan 0, /* cur_term */ 229174993Srafan#ifdef TRACE 230174993Srafan 0L, /* _outchars */ 231174993Srafan NULL, /* _tputs_trace */ 232174993Srafan#endif 233174993Srafan#endif 234174993Srafan}; 235174993Srafan/* *INDENT-ON* */ 236176187Srafan 237176187Srafan/******************************************************************************/ 238176187Srafan#ifdef USE_PTHREADS 239178866Srafanstatic void 240178866Srafaninit_global_mutexes(void) 241178866Srafan{ 242178866Srafan static bool initialized = FALSE; 243178866Srafan 244178866Srafan if (!initialized) { 245178866Srafan initialized = TRUE; 246184989Srafan _nc_mutex_init(&_nc_globals.mutex_curses); 247178866Srafan _nc_mutex_init(&_nc_globals.mutex_tst_tracef); 248178866Srafan _nc_mutex_init(&_nc_globals.mutex_tracef); 249178866Srafan } 250178866Srafan} 251178866Srafan 252184989SrafanNCURSES_EXPORT(void) 253184989Srafan_nc_init_pthreads(void) 254184989Srafan{ 255184989Srafan if (_nc_use_pthreads) 256184989Srafan return; 257184989Srafan# if USE_WEAK_SYMBOLS 258184989Srafan if ((pthread_mutex_init) == 0) 259184989Srafan return; 260184989Srafan if ((pthread_mutex_lock) == 0) 261184989Srafan return; 262184989Srafan if ((pthread_mutex_unlock) == 0) 263184989Srafan return; 264184989Srafan if ((pthread_mutex_trylock) == 0) 265184989Srafan return; 266184989Srafan if ((pthread_mutexattr_settype) == 0) 267184989Srafan return; 268184989Srafan# endif 269184989Srafan _nc_use_pthreads = 1; 270184989Srafan init_global_mutexes(); 271184989Srafan} 272184989Srafan 273178866Srafan/* 274178866Srafan * Use recursive mutexes if we have them - they're part of Unix98. 275178866Srafan * For the cases where we do not, _nc_mutex_trylock() is used to avoid a 276178866Srafan * deadlock, at the expense of memory leaks and unexpected failures that 277178866Srafan * may not be handled by typical clients. 278178866Srafan * 279178866Srafan * FIXME - need configure check for PTHREAD_MUTEX_RECURSIVE, define it to 280178866Srafan * PTHREAD_MUTEX_NORMAL if not supported. 281178866Srafan */ 282178866SrafanNCURSES_EXPORT(void) 283178866Srafan_nc_mutex_init(pthread_mutex_t * obj) 284178866Srafan{ 285178866Srafan pthread_mutexattr_t recattr; 286178866Srafan 287184989Srafan if (_nc_use_pthreads) { 288184989Srafan pthread_mutexattr_init(&recattr); 289184989Srafan pthread_mutexattr_settype(&recattr, PTHREAD_MUTEX_RECURSIVE); 290184989Srafan pthread_mutex_init(obj, &recattr); 291184989Srafan } 292178866Srafan} 293178866Srafan 294176187SrafanNCURSES_EXPORT(int) 295178866Srafan_nc_mutex_lock(pthread_mutex_t * obj) 296176187Srafan{ 297184989Srafan if (_nc_use_pthreads == 0) 298184989Srafan return 0; 299176187Srafan return pthread_mutex_lock(obj); 300176187Srafan} 301176187Srafan 302176187SrafanNCURSES_EXPORT(int) 303178866Srafan_nc_mutex_trylock(pthread_mutex_t * obj) 304176187Srafan{ 305184989Srafan if (_nc_use_pthreads == 0) 306184989Srafan return 0; 307176187Srafan return pthread_mutex_trylock(obj); 308176187Srafan} 309176187Srafan 310176187SrafanNCURSES_EXPORT(int) 311178866Srafan_nc_mutex_unlock(pthread_mutex_t * obj) 312176187Srafan{ 313184989Srafan if (_nc_use_pthreads == 0) 314184989Srafan return 0; 315176187Srafan return pthread_mutex_unlock(obj); 316176187Srafan} 317184989Srafan 318184989Srafan#if USE_WEAK_SYMBOLS 319184989Srafan/* 320184989Srafan * NB: sigprocmask(2) is global but pthread_sigmask(3p) 321184989Srafan * only for the calling thread. 322184989Srafan */ 323184989SrafanNCURSES_EXPORT(int) 324184989Srafan_nc_sigprocmask(int how, const sigset_t * newmask, sigset_t * oldmask) 325184989Srafan{ 326184989Srafan if ((pthread_sigmask)) 327184989Srafan return pthread_sigmask(how, newmask, oldmask); 328184989Srafan else 329184989Srafan return sigprocmask(how, newmask, oldmask); 330184989Srafan} 331184989Srafan#endif 332176187Srafan#endif /* USE_PTHREADS */ 333