X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Fbase%2Flib_newwin.c;h=086dd1023d3e21ab7b20b848680933cfb7f36ecd;hp=21ba95f34ed6e1a0d7bec77b13ef643916d2115d;hb=9fab8ab6b69130169a6880e63585d83efb1c1722;hpb=c4d90db4f4e50bb8a971955ce4812262da4a50bc

diff --git a/ncurses/base/lib_newwin.c b/ncurses/base/lib_newwin.c
index 21ba95f3..086dd102 100644
--- a/ncurses/base/lib_newwin.c
+++ b/ncurses/base/lib_newwin.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * 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            *
@@ -30,6 +30,7 @@
  *  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                         2009                    *
  ****************************************************************************/
 
 /*
@@ -40,42 +41,39 @@
 */
 
 #include <curses.priv.h>
+#include <stddef.h>
 
-MODULE_ID("$Id: lib_newwin.c,v 1.44 2008/01/13 00:28:13 tom Exp $")
+MODULE_ID("$Id: lib_newwin.c,v 1.53 2009/02/15 00:38:00 tom Exp $")
 
-static WINDOW *
+#define window_is(name) ((sp)->_##name == win)
+
+#if USE_REENTRANT
+#define remove_window(name) \
+		sp->_##name = 0
+#else
+#define remove_window(name) \
+		sp->_##name = 0; \
+		if (win == name) \
+		    name = 0
+#endif
+
+static void
 remove_window_from_screen(WINDOW *win)
 {
-    SCREEN **scan = &_nc_screen_chain;
-
-    while (*scan) {
-	SCREEN *sp = *scan;
-	if (sp->_curscr == win) {
-	    sp->_curscr = 0;
-#if !USE_REENTRANT
-	    if (win == curscr)
-		curscr = 0;
-#endif
-	} else if (sp->_stdscr == win) {
-	    sp->_stdscr = 0;
-#if !USE_REENTRANT
-	    if (win == stdscr)
-		stdscr = 0;
-#endif
-	} else if (sp->_newscr == win) {
-	    sp->_newscr = 0;
-#if !USE_REENTRANT
-	    if (win == newscr)
-		newscr = 0;
-#endif
-	} else {
-	    scan = &(*scan)->_next_screen;
-	    continue;
+    SCREEN *sp;
+
+    for (each_screen(sp)) {
+	if (window_is(curscr)) {
+	    remove_window(curscr);
+	    break;
+	} else if (window_is(stdscr)) {
+	    remove_window(stdscr);
+	    break;
+	} else if (window_is(newscr)) {
+	    remove_window(newscr);
+	    break;
 	}
-	break;
     }
-
-    return 0;
 }
 
 NCURSES_EXPORT(int)
@@ -88,8 +86,9 @@ _nc_freewin(WINDOW *win)
     T((T_CALLED("_nc_freewin(%p)"), win));
 
     if (win != 0) {
-	if (_nc_try_global(windowlist) == 0) {
-	    for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
+	if (_nc_try_global(curses) == 0) {
+	    q = 0;
+	    for (each_window(p)) {
 		if (&(p->win) == win) {
 		    remove_window_from_screen(win);
 		    if (q == 0)
@@ -108,15 +107,17 @@ _nc_freewin(WINDOW *win)
 		    T(("...deleted win=%p", win));
 		    break;
 		}
+		q = p;
 	    }
-	    _nc_unlock_global(windowlist);
+	    _nc_unlock_global(curses);
 	}
     }
     returnCode(result);
 }
 
 NCURSES_EXPORT(WINDOW *)
-newwin(int num_lines, int num_columns, int begy, int begx)
+NCURSES_SP_NAME(newwin) (NCURSES_SP_DCLx
+			 int num_lines, int num_columns, int begy, int begx)
 {
     WINDOW *win;
     NCURSES_CH_T *ptr;
@@ -128,7 +129,7 @@ newwin(int num_lines, int num_columns, int begy, int begx)
 	returnWin(0);
 
     if (num_lines == 0)
-	num_lines = SP->_lines_avail - begy;
+	num_lines = SP_PARM->_lines_avail - begy;
     if (num_columns == 0)
 	num_columns = screen_columns - begx;
 
@@ -150,6 +151,15 @@ newwin(int num_lines, int num_columns, int begy, int begx)
     returnWin(win);
 }
 
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(WINDOW *)
+newwin(int num_lines, int num_columns, int begy, int begx)
+{
+    return NCURSES_SP_NAME(newwin) (CURRENT_SCREEN, num_lines, num_columns,
+				    begy, begx);
+}
+#endif
+
 NCURSES_EXPORT(WINDOW *)
 derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
 {
@@ -230,15 +240,6 @@ _nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
     if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
 	returnWin(0);
 
-#ifdef USE_PTHREADS
-    {
-	pthread_mutexattr_t recattr;
-	memset(&recattr, 0, sizeof(recattr));
-	pthread_mutexattr_settype(&recattr, PTHREAD_MUTEX_NORMAL);
-	pthread_mutex_init(&(wp->mutex_use_window), &recattr);
-    }
-#endif
-
     win = &(wp->win);
 
     if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
@@ -246,7 +247,7 @@ _nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
 	returnWin(0);
     }
 
-    _nc_lock_global(windowlist);
+    _nc_lock_global(curses);
 
     win->_curx = 0;
     win->_cury = 0;
@@ -321,10 +322,28 @@ _nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
     }
 
     wp->next = _nc_windows;
+    wp->screen = SP;
     _nc_windows = wp;
 
     T((T_CREATE("window %p"), win));
 
-    _nc_unlock_global(windowlist);
+    _nc_unlock_global(curses);
     returnWin(win);
 }
+
+/*
+ * 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);
+}