/****************************************************************************
- * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2008,2009 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 *
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996-on *
+ * and: Juergen Pfeifer *
****************************************************************************/
/*
#include <curses.priv.h>
-MODULE_ID("$Id: lib_data.c,v 1.40 2008/02/23 21:23:44 tom Exp $")
+MODULE_ID("$Id: lib_data.c,v 1.56 2009/11/21 22:34:17 tom Exp $")
/*
* OS/2's native linker complains if we don't initialize public data when
NCURSES_EXPORT(WINDOW *)
NCURSES_PUBLIC_VAR(stdscr) (void)
{
- return SP ? SP->_stdscr : 0;
+ return CURRENT_SCREEN ? StdScreen(CURRENT_SCREEN) : 0;
}
NCURSES_EXPORT(WINDOW *)
NCURSES_PUBLIC_VAR(curscr) (void)
{
- return SP ? SP->_curscr : 0;
+ return CURRENT_SCREEN ? CurScreen(CURRENT_SCREEN) : 0;
}
NCURSES_EXPORT(WINDOW *)
NCURSES_PUBLIC_VAR(newscr) (void)
{
- return SP ? SP->_newscr : 0;
+ return CURRENT_SCREEN ? NewScreen(CURRENT_SCREEN) : 0;
}
#else
NCURSES_EXPORT_VAR(WINDOW *) stdscr = 0;
NCURSES_EXPORT(int)
_nc_alloc_screen(void)
{
- return ((my_screen = typeCalloc(SCREEN, 1)) != 0);
+ return ((my_screen = _nc_alloc_screen_sp()) != 0);
}
NCURSES_EXPORT(void)
}
#else
+
NCURSES_EXPORT_VAR(SCREEN *) SP = NULL; /* Some linkers require initialized data... */
#endif
/* *INDENT-OFF* */
0, /* tgetent_index */
0, /* tgetent_sequence */
+#ifndef USE_SP_WINDOWLIST
+ 0, /* _nc_windowlist */
+#endif
+
#if USE_HOME_TERMINFO
NULL, /* home_terminfo */
#endif
NULL, /* tracedmp_buf */
0, /* tracedmp_used */
- CHARS_0s, /* tracemse_buf */
-
NULL, /* tracetry_buf */
0, /* tracetry_used */
{ CHARS_0s, CHARS_0s }, /* traceatr_color_buf */
0, /* traceatr_color_sel */
-1, /* traceatr_color_last */
-
+#if !defined(USE_PTHREADS) && USE_REENTRANT
+ 0, /* nested_tracef */
+#endif
#endif /* TRACE */
#ifdef USE_PTHREADS
- PTHREAD_MUTEX_INITIALIZER, /* mutex_set_SP */
- PTHREAD_MUTEX_INITIALIZER, /* mutex_use_screen */
- PTHREAD_MUTEX_INITIALIZER, /* mutex_use_window */
- PTHREAD_MUTEX_INITIALIZER, /* mutex_windowlist */
+ PTHREAD_MUTEX_INITIALIZER, /* mutex_curses */
PTHREAD_MUTEX_INITIALIZER, /* mutex_tst_tracef */
PTHREAD_MUTEX_INITIALIZER, /* mutex_tracef */
0, /* nested_tracef */
+ 0, /* use_pthreads */
#endif
};
TRUE, /* use_env */
FALSE, /* filter_mode */
A_NORMAL, /* previous_attr */
+#ifndef USE_SP_RIPOFF
RIPOFF_0s, /* ripoff */
NULL, /* rsp */
+#endif
{ /* tparm_state */
#ifdef TRACE
NULL, /* tname */
NUM_VARS_0s, /* static_vars */
},
NULL, /* saved_tty */
+#if NCURSES_NO_PADDING
+ FALSE, /* flag to set if padding disabled */
+#endif
+ 0, /* _outch */
#if BROKEN_LINKER || USE_REENTRANT
NULL, /* real_acs_map */
0, /* LINES */
0, /* COLS */
+ 8, /* TABSIZE */
+ 1000, /* ESCDELAY */
+ 0, /* cur_term */
#ifdef TRACE
0L, /* _outchars */
NULL, /* _tputs_trace */
};
/* *INDENT-ON* */
+/*
+ * wgetch() and other functions with a WINDOW* parameter may use a SCREEN*
+ * internally, and it is useful to allow those to be invoked without switching
+ * SCREEN's, e.g., for multi-threaded applications.
+ */
+NCURSES_EXPORT(SCREEN *)
+_nc_screen_of(WINDOW *win)
+{
+ SCREEN *sp = 0;
+
+ if (win != 0) {
+ WINDOWLIST *wp = (WINDOWLIST *) win;
+ sp = wp->screen;
+ }
+ return (sp);
+}
+
/******************************************************************************/
#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;
- memset(&recattr, 0, sizeof(recattr));
- pthread_mutexattr_settype(&recattr, PTHREAD_MUTEX_NORMAL);
- pthread_mutex_init(obj, &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 */
projects / ncurses.git / blobdiff