annotate lwlib/xt-wrappers.h @ 5013:ae48681c47fa

changes to VOID_TO_LISP et al. -------------------- ChangeLog entries follow: -------------------- src/ChangeLog addition: 2010-02-08 Ben Wing <ben@xemacs.org> * casetab.c (compute_canon_mapper): * casetab.c (initialize_identity_mapper): * casetab.c (compute_up_or_eqv_mapper): * casetab.c (recompute_case_table): * casetab.c (set_case_table): * chartab.c (copy_mapper): * chartab.c (copy_char_table_range): * chartab.c (get_range_char_table_1): * console.c (find_nonminibuffer_frame_not_on_console_predicate): * console.c (find_nonminibuffer_frame_not_on_console): * console.c (nuke_all_console_slots): * device.c: * device.c (find_nonminibuffer_frame_not_on_device_predicate): * device.c (find_nonminibuffer_frame_not_on_device): * dialog-msw.c (dialog_proc): * dialog-msw.c (handle_question_dialog_box): * dialog-x.c (maybe_run_dbox_text_callback): * eval.c: * eval.c (safe_run_hook_trapping_problems_1): * eval.c (safe_run_hook_trapping_problems): * event-msw.c: * event-msw.c (mswindows_wnd_proc): * event-msw.c (mswindows_find_frame): * faces.c (update_face_inheritance_mapper): * frame-msw.c (mswindows_init_frame_1): * frame-msw.c (mswindows_get_mouse_position): * frame-msw.c (mswindows_get_frame_parent): * glade.c (connector): * glade.c (Fglade_xml_signal_connect): * glade.c (Fglade_xml_signal_autoconnect): * glade.c (Fglade_xml_textdomain): * glyphs-msw.c (mswindows_subwindow_instantiate): * glyphs-msw.c (mswindows_widget_instantiate): * glyphs.c (check_instance_cache_mapper): * glyphs.c (check_window_subwindow_cache): * glyphs.c (check_image_instance_structure): * gui-x.c (snarf_widget_value_mapper): * gui-x.c (popup_selection_callback): * gui-x.c (button_item_to_widget_value): * keymap.c (map_keymap_mapper): * keymap.c (Fmap_keymap): * menubar-gtk.c (__torn_off_sir): * menubar-gtk.c (__activate_menu): * menubar-gtk.c (menu_convert): * menubar-gtk.c (__generic_button_callback): * menubar-gtk.c (menu_descriptor_to_widget_1): * menubar-msw.c: * menubar-msw.c (EMPTY_ITEM_ID): * menubar-x.c (menu_item_descriptor_to_widget_value_1): * menubar-x.c (pre_activate_callback): * menubar-x.c (command_builder_operate_menu_accelerator): * menubar-x.c (command_builder_find_menu_accelerator): * print.c (print_internal): * process-unix.c (close_process_descs_mapfun): * process.c (get_process_from_usid): * process.c (init_process_io_handles): * profile.c (sigprof_handler): * profile.c (get_profiling_info_timing_maphash): * profile.c (Fget_profiling_info): * profile.c (set_profiling_info_timing_maphash): * profile.c (mark_profiling_info_maphash): * scrollbar-msw.c (mswindows_create_scrollbar_instance): * scrollbar-msw.c (mswindows_free_scrollbar_instance): * scrollbar-msw.c (mswindows_handle_scrollbar_event): * specifier.c (recompute_cached_specifier_everywhere_mapfun): * specifier.c (recompute_cached_specifier_everywhere): * syntax.c (copy_to_mirrortab): * syntax.c (copy_if_not_already_present): * syntax.c (update_just_this_syntax_table): * text.c (new_dfc_convert_now_damn_it): * text.h (LISP_STRING_TO_EXTERNAL): * tooltalk.c: * tooltalk.c (tooltalk_message_callback): * tooltalk.c (tooltalk_pattern_callback): * tooltalk.c (Fcreate_tooltalk_message): * tooltalk.c (Fcreate_tooltalk_pattern): * ui-byhand.c (__generic_toolbar_callback): * ui-byhand.c (generic_toolbar_insert_item): * ui-byhand.c (__emacs_gtk_ctree_recurse_internal): * ui-byhand.c (Fgtk_ctree_recurse): * ui-gtk.c (__internal_callback_destroy): * ui-gtk.c (__internal_callback_marshal): * ui-gtk.c (Fgtk_signal_connect): * ui-gtk.c (gtk_type_to_lisp): * ui-gtk.c (lisp_to_gtk_type): * ui-gtk.c (lisp_to_gtk_ret_type): * lisp-disunion.h: * lisp-disunion.h (NON_LVALUE): * lisp-union.h: * lisp.h (LISP_HASH): Rename: LISP_TO_VOID -> STORE_LISP_IN_VOID VOID_TO_LISP -> GET_LISP_FROM_VOID These new names are meant to clearly identify that the Lisp object is the source and void the sink, and that they can't be used the other way around -- they aren't exact opposites despite the old names. The names are also important given the new functions created just below. Also, clarify comments in lisp-union.h and lisp-disunion.h about the use of the functions. * lisp.h: New functions STORE_VOID_IN_LISP and GET_VOID_FROM_LISP. These are different from the above in that the source is a void * (previously, you had to use make_opaque_ptr()). * eval.c (restore_lisp_object): * eval.c (record_unwind_protect_restoring_lisp_object): * eval.c (struct restore_int): * eval.c (restore_int): * eval.c (record_unwind_protect_restoring_int): * eval.c (free_pointer): * eval.c (record_unwind_protect_freeing): * eval.c (free_dynarr): * eval.c (record_unwind_protect_freeing_dynarr): * eval.c (unbind_to_1): Use STORE_VOID_IN_LISP and GET_VOID_FROM_LISP to eliminate the use of make_opaque_ptr() and mostly eliminate Lisp consing entirely in the use of these various record_unwind_protect_* functions as well as internal_bind_* (e.g. internal_bind_int). * tests.c: * tests.c (Ftest_store_void_in_lisp): * tests.c (syms_of_tests): * tests.c (vars_of_tests): Add an C-assert-style test to test STORE_VOID_IN_LISP and GET_VOID_FROM_LISP to make sure the same value comes back that was put in.
author Ben Wing <ben@xemacs.org>
date Mon, 08 Feb 2010 06:42:16 -0600
parents 726060ee587c
children 2ade80e8c640
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1 /* Wrappers for Xt functions and macros
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3 Copyright (C) 2008 Free Software Foundation
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5 This file is part of XEmacs.
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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21 /* Synched up with: Not in FSF. */
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23 /* Original author: Stephen J. Turnbull for 21.5.29 */
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25 /* Generic utility macros, including coping with G++ whining.
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26 Used in lwlib via lwlib.h and X consoles via console-x.h.
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28 We would prefer to find another way to shut up G++. The issue is that
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29 recent versions of the C++ standard deprecate implicit conversions
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30 across function boundaries like
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32 typedef char *String;
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33 void foo (String string);
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34 foo ("bar");
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36 because "bar" should be allowed to be a read-only array of chars. But of
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37 course lots of legacy code (== X11) declares things as char * and expects
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38 to assign literal strings to them. Now, the typedef in the example is
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39 important because in G++ 4.3.2 at least, this
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41 void foo (const String string);
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42 foo ("bar");
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44 does not work as expected! G++ still warns about this construct. However,
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45 if foo is declared
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47 void foo (const char *string);
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49 G++ does not complain. (#### There are two possibilities I can think of.
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50 (a) G++ is buggy. (b) "const String" is interpreted as "char * const".)
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52 The upshot is that to avoid warnings with Xt's String typedef, we need to
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53 arrange to cast literal strings to String, rather than use "const String"
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54 in declarations. (My <X11/Intrinsic.h> says that the actual internal
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55 typedef used is _XtString, so that String can be #define'd to something
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56 else for the purposes of C++. But that doesn't really help us much.)
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58 It's not very satisfactory to do it this way -- it would be much better to
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59 have const Strings where they make sense -- but it does eliminate a few
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60 hundred warnings from the C++ build. And in any case we don't control the
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61 many objects declared with String components in Intrinsic.h. The remaining
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62 issues are the WEXTTEXT macro used in src/emacs.c, and Emacs.ad.h (where
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63 instead of String we use const char * in src/event-Xt.c in the array that
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64 #includes it).
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65 */
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67 #ifndef INCLUDED_xt_wrappers_h_
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68 #define INCLUDED_xt_wrappers_h_
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70 /* Wrap XtResource, with the same elements as arguments.
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71 The cast to String shuts up G++ 4.3's whining about const char *.
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72 The invocation of sizeof should be pretty safe, and the cast to XtPointer
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73 surely is, since that's how that member of XtResource is declared. It
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74 doesn't hide potential problems, because XtPointer is a "generic" type in
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75 any case -- the actual object will have a different type, that will be
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76 cast to XtPointer. */
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78 #define Xt_RESOURCE(name,_class,intrepr,type,member,extrepr,value) \
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79 { (String) name, (String) _class, (String) intrepr, sizeof(type), \
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80 member, extrepr, (XtPointer) value }
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82 /* Wrap XtSetArg, with the same arguments.
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83 The cast to String shuts up G++ 4.3's whining about const char *. */
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85 #define Xt_SET_ARG(al, resource, x) do { \
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86 XtSetArg ((al), (String) (resource), (x)); \
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87 } while (0)
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89 /* Convenience macros for getting/setting one resource value. */
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90
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91 #define Xt_SET_VALUE(widget, resource, value) do { \
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92 Arg al; \
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93 Xt_SET_ARG (al, resource, value); \
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94 XtSetValues (widget, &al, 1); \
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95 } while (0)
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96
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97 #define Xt_GET_VALUE(widget, resource, location) do { \
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98 Arg al; \
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99 Xt_SET_ARG (al, resource, location); \
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100 XtGetValues (widget, &al, 1); \
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101 } while (0)
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102
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103 #endif /* INCLUDED_xt_wrappers_h_ */