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/* $OpenBSD: lib_data.c,v 1.4 2010/01/12 23:22:06 nicm Exp $ */
/****************************************************************************
* 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 1.4 2010/01/12 23:22:06 nicm 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 */
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