X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Fbase%2Flib_newwin.c;h=78a18b88631e95760ec8bc75b4a5b110c0f03713;hp=84763c93fc27277803d39d67aa63611a2d44cb18;hb=bd7ef7c2309fd00aa4576168c46f557c622cb9c3;hpb=6a5e1ae3015763934a358df2680a77458ca3e342

diff --git a/ncurses/base/lib_newwin.c b/ncurses/base/lib_newwin.c
index 84763c93..78a18b88 100644
--- a/ncurses/base/lib_newwin.c
+++ b/ncurses/base/lib_newwin.c
@@ -42,9 +42,9 @@
 #include <curses.priv.h>
 #include <stddef.h>
 
-MODULE_ID("$Id: lib_newwin.c,v 1.46 2008/04/05 19:16:42 tom Exp $")
+MODULE_ID("$Id: lib_newwin.c,v 1.51 2008/05/31 21:50:09 tom Exp $")
 
-#define window_is(name) (sp->_##name == win)
+#define window_is(name) ((sp)->_##name == win)
 
 #if USE_REENTRANT
 #define remove_window(name) \
@@ -56,27 +56,23 @@ MODULE_ID("$Id: lib_newwin.c,v 1.46 2008/04/05 19:16:42 tom Exp $")
 		    name = 0
 #endif
 
-static WINDOW *
+static void
 remove_window_from_screen(WINDOW *win)
 {
-    SCREEN **scan = &_nc_screen_chain;
+    SCREEN *sp;
 
-    while (*scan) {
-	SCREEN *sp = *scan;
+    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);
-	} else {
-	    scan = &(*scan)->_next_screen;
-	    continue;
+	    break;
 	}
-	break;
     }
-
-    return 0;
 }
 
 NCURSES_EXPORT(int)
@@ -90,7 +86,8 @@ _nc_freewin(WINDOW *win)
 
     if (win != 0) {
 	if (_nc_try_global(windowlist) == 0) {
-	    for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
+	    q = 0;
+	    for (each_window(p)) {
 		if (&(p->win) == win) {
 		    remove_window_from_screen(win);
 		    if (q == 0)
@@ -109,6 +106,7 @@ _nc_freewin(WINDOW *win)
 		    T(("...deleted win=%p", win));
 		    break;
 		}
+		q = p;
 	    }
 	    _nc_unlock_global(windowlist);
 	}
@@ -315,6 +313,7 @@ _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));
@@ -322,3 +321,20 @@ _nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
     _nc_unlock_global(windowlist);
     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);
+}