mirror of
https://github.com/Aigor44/ncursesw-morphos.git
synced 2024-12-27 07:49:06 +08:00
1078c0231b
+ finish changes to wgetch(), making it switch as needed to the window's actual screen when calling wrefresh() and wgetnstr(). That allows wgetch() to get used concurrently in different threads with some minor restrictions, e.g., the application should not delete a window which is being used in a wgetch(). + simplify mutex's, combining the window- and screen-mutex's.
288 lines
8.2 KiB
C
288 lines
8.2 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
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* and: Eric S. Raymond <esr@snark.thyrsus.com> *
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* and: Thomas E. Dickey 1996-on *
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****************************************************************************/
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/*
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** lib_data.c
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**
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** Common data that may/may not be allocated, but is referenced globally
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**
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*/
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#include <curses.priv.h>
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MODULE_ID("$Id: lib_data.c,v 1.48 2008/06/07 14:03:15 tom Exp $")
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/*
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* OS/2's native linker complains if we don't initialize public data when
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* constructing a dll (reported by J.J.G.Ripoll).
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*/
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#if USE_REENTRANT
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NCURSES_EXPORT(WINDOW *)
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NCURSES_PUBLIC_VAR(stdscr) (void)
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{
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return SP ? SP->_stdscr : 0;
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}
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NCURSES_EXPORT(WINDOW *)
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NCURSES_PUBLIC_VAR(curscr) (void)
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{
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return SP ? SP->_curscr : 0;
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}
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NCURSES_EXPORT(WINDOW *)
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NCURSES_PUBLIC_VAR(newscr) (void)
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{
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return SP ? SP->_newscr : 0;
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}
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#else
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NCURSES_EXPORT_VAR(WINDOW *) stdscr = 0;
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NCURSES_EXPORT_VAR(WINDOW *) curscr = 0;
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NCURSES_EXPORT_VAR(WINDOW *) newscr = 0;
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#endif
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NCURSES_EXPORT_VAR(SCREEN *) _nc_screen_chain = 0;
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/*
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* The variable 'SP' will be defined as a function on systems that cannot link
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* data-only modules, since it is used in a lot of places within ncurses and we
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* cannot guarantee that any application will use any particular function. We
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* put the WINDOW variables in this module, because it appears that any
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* application that uses them will also use 'SP'.
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*
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* This module intentionally does not reference other ncurses modules, to avoid
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* module coupling that increases the size of the executable.
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*/
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#if BROKEN_LINKER
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static SCREEN *my_screen;
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NCURSES_EXPORT(SCREEN *)
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_nc_screen(void)
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{
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return my_screen;
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}
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NCURSES_EXPORT(int)
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_nc_alloc_screen(void)
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{
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return ((my_screen = typeCalloc(SCREEN, 1)) != 0);
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}
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NCURSES_EXPORT(void)
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_nc_set_screen(SCREEN *sp)
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{
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my_screen = sp;
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}
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#else
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NCURSES_EXPORT_VAR(SCREEN *) SP = NULL; /* Some linkers require initialized data... */
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#endif
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/* *INDENT-OFF* */
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#define CHARS_0s { '\0' }
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#define TGETENT_0 { 0L, FALSE, NULL, NULL, NULL }
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#define TGETENT_0s { TGETENT_0, TGETENT_0, TGETENT_0, TGETENT_0 }
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NCURSES_EXPORT_VAR(NCURSES_GLOBALS) _nc_globals = {
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0, /* have_sigwinch */
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0, /* cleanup_nested */
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FALSE, /* init_signals */
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FALSE, /* init_screen */
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NULL, /* comp_sourcename */
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NULL, /* comp_termtype */
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FALSE, /* have_tic_directory */
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FALSE, /* keep_tic_directory */
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TERMINFO, /* tic_directory */
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NULL, /* dbi_list */
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0, /* dbi_size */
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NULL, /* first_name */
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NULL, /* keyname_table */
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0, /* slk_format */
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NULL, /* safeprint_buf */
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0, /* safeprint_used */
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TGETENT_0s, /* tgetent_cache */
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0, /* tgetent_index */
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0, /* tgetent_sequence */
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0, /* _nc_windowlist */
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#if USE_HOME_TERMINFO
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NULL, /* home_terminfo */
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#endif
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#if !USE_SAFE_SPRINTF
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0, /* safeprint_cols */
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0, /* safeprint_rows */
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#endif
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#ifdef TRACE
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FALSE, /* init_trace */
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CHARS_0s, /* trace_fname */
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0, /* trace_level */
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NULL, /* trace_fp */
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NULL, /* tracearg_buf */
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0, /* tracearg_used */
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NULL, /* tracebuf_ptr */
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0, /* tracebuf_used */
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CHARS_0s, /* tracechr_buf */
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NULL, /* tracedmp_buf */
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0, /* tracedmp_used */
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NULL, /* tracetry_buf */
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0, /* tracetry_used */
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{ CHARS_0s, CHARS_0s }, /* traceatr_color_buf */
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0, /* traceatr_color_sel */
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-1, /* traceatr_color_last */
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#endif /* TRACE */
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#ifdef USE_PTHREADS
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PTHREAD_MUTEX_INITIALIZER, /* mutex_curses */
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PTHREAD_MUTEX_INITIALIZER, /* mutex_tst_tracef */
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PTHREAD_MUTEX_INITIALIZER, /* mutex_tracef */
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0, /* nested_tracef */
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#endif
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};
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#define STACK_FRAME_0 { { 0 }, 0 }
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#define STACK_FRAME_0s { STACK_FRAME_0 }
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#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 }
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#define RIPOFF_0 { 0,0,0 }
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#define RIPOFF_0s { RIPOFF_0 }
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NCURSES_EXPORT_VAR(NCURSES_PRESCREEN) _nc_prescreen = {
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TRUE, /* use_env */
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FALSE, /* filter_mode */
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A_NORMAL, /* previous_attr */
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RIPOFF_0s, /* ripoff */
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NULL, /* rsp */
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{ /* tparm_state */
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#ifdef TRACE
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NULL, /* tname */
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#endif
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NULL, /* tparam_base */
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STACK_FRAME_0s, /* stack */
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0, /* stack_ptr */
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NULL, /* out_buff */
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0, /* out_size */
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0, /* out_used */
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NULL, /* fmt_buff */
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0, /* fmt_size */
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NUM_VARS_0s, /* dynamic_var */
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NUM_VARS_0s, /* static_vars */
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},
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NULL, /* saved_tty */
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#if BROKEN_LINKER || USE_REENTRANT
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NULL, /* real_acs_map */
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0, /* LINES */
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0, /* COLS */
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0, /* cur_term */
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#ifdef TRACE
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0L, /* _outchars */
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NULL, /* _tputs_trace */
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#endif
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#endif
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};
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/* *INDENT-ON* */
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/******************************************************************************/
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#ifdef USE_PTHREADS
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static void
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init_global_mutexes(void)
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{
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static bool initialized = FALSE;
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if (!initialized) {
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initialized = TRUE;
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_nc_mutex_init(&_nc_globals.mutex_curses);
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_nc_mutex_init(&_nc_globals.mutex_tst_tracef);
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_nc_mutex_init(&_nc_globals.mutex_tracef);
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}
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}
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/*
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* Use recursive mutexes if we have them - they're part of Unix98.
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* For the cases where we do not, _nc_mutex_trylock() is used to avoid a
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* deadlock, at the expense of memory leaks and unexpected failures that
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* may not be handled by typical clients.
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*
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* FIXME - need configure check for PTHREAD_MUTEX_RECURSIVE, define it to
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* PTHREAD_MUTEX_NORMAL if not supported.
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*/
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NCURSES_EXPORT(void)
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_nc_mutex_init(pthread_mutex_t * obj)
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{
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pthread_mutexattr_t recattr;
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memset(&recattr, 0, sizeof(recattr));
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pthread_mutexattr_settype(&recattr, PTHREAD_MUTEX_RECURSIVE);
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pthread_mutex_init(obj, &recattr);
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}
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NCURSES_EXPORT(int)
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_nc_mutex_lock(pthread_mutex_t * obj)
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{
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init_global_mutexes();
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return pthread_mutex_lock(obj);
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}
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NCURSES_EXPORT(int)
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_nc_mutex_trylock(pthread_mutex_t * obj)
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{
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init_global_mutexes();
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return pthread_mutex_trylock(obj);
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}
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NCURSES_EXPORT(int)
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_nc_mutex_unlock(pthread_mutex_t * obj)
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{
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init_global_mutexes();
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return pthread_mutex_unlock(obj);
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}
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#endif /* USE_PTHREADS */
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