mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2025-08-01 15:03:39 +02:00
added newly added gobject/ headers.
Tue Oct 24 22:09:14 2000 Tim Janik <timj@gtk.org> * glib-object.h: added newly added gobject/ headers. * gmesage.c: print g_message() output to stderr instead of stdout. Wed Oct 25 20:27:02 2000 Tim Janik <timj@gtk.org> * gtype.c (g_type_free_instance): for the moment, freeing object structures will fill their memory portion with 0xAA. there's a FIXME there, remove this line at a later point. Tue Oct 24 23:10:26 2000 Tim Janik <timj@gtk.org> * glib-genmarshal.1: * glib-genmarshal.c: added publically installed marshaller generator. * gtype.h: added G_TYPE_INSTANCE_GET_INTERFACE() to retrive a certain interface VTable from instances. Mon Oct 23 08:28:15 2000 Tim Janik <timj@gtk.org> * gobject.[hc]: new functions for closure maintenance: (g_object_watch_closure): maintain validity of the object and the closure for objects that are used as data part of a closure. (g_cclosure_new_object): convenience function to create C closures that have an object as data argument. (g_closure_new_object): convenience function to create closures that have an object as data argument. * gclosure.[hc]: implementation of GClosure mechanism. a closure is basically an encapsulation of a callback function and its environment. ideally, most places supporting callback functions will simply take a GClosure* pointer and thus unify callback environments wrg destroy notification etc. GClosure provides destroy notifiers for arbitrary data pointers, reference counting, invalidation notification (it can be invalidated which is merely a deactivate state) and a marshallinbg abstraction. GCClosure is also provided in these files, they present a specialized GClosure implementation for C language callbacks. * genum.c: macro cleanups. * gboxed.[hc]: new files, for boxed type abstraction. (g_boxed_copy): copy a boxed structure (g_boxed_free): free a boxed structure (g_value_set_boxed): (g_value_get_boxed): standard GValue functions for boxed types (g_boxed_type_register_static): convenience function for easy introduction of new G_TYPE_BOXED derivatives. * gparam.[hc]: introduced g_param_type_register_static(), a short hand for creation of new GParamSpec derived types. * gtype.[hc]: many fixes, introduced ability to flag individual type nodes as ABSTRACT upon registration, added value_peek_pointer() to the value table to peek at GValue contents as a pointer for types that support this. fixed up GValue checks. * gvalue.[hc]: added g_value_fits_pointer() and g_value_get_as_pointer() to peek at the value contents as pointer. * *.[hc]: adaptions to type macro fixes and changes in the type registration API. * many const corrections over the place. Sat Oct 21 02:49:56 2000 Tim Janik <timj@gtk.org> * gtype.c (g_type_conforms_to): this function basically behaves like and is_a check, except that it _additionally_ features interfaces for instantiatable types. enforce this in the second branch as well (`type' conforms_to `type') even if `type' is not an interface type. Fri Oct 20 15:31:04 2000 Tim Janik <timj@gtk.org> * gvaluetypes.[hc]: added G_TYPE_POINTER implementation from jrb. * gtype.[hc]: * gobject.c: * gvaluetypes.c: added GTypeValueTable.value_peek_pointer and suitable implementations of this for G_TYPE_STRING, G_TYPE_OBJECT and G_TYPE_POINTER. Mon Aug 21 04:13:37 2000 Tim Janik <timj@gtk.org> * gbsearcharray.[hc]: long standing needed generic implementation of a binary searchable, sorted and dynamically sized array.
This commit is contained in:
Tim Janik
Tim Janik
185
gobject/gclosure.h
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185
gobject/gclosure.h
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/* GObject - GLib Type, Object, Parameter and Signal Library
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* Copyright (C) 2000 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __G_CLOSURE_H__
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#define __G_CLOSURE_H__
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#include <gobject/gtype.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/* --- defines --- */
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#define G_CLOSURE_NEEDS_MARSHAL(closure) (((GClosure*) (closure))->marshal == NULL)
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#define G_CCLOSURE_SWAP_DATA(cclosure) (((GClosure*) (closure))->derivative_flag)
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/* -- typedefs --- */
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typedef struct _GClosure GClosure;
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typedef struct _GClosureNotifyData GClosureNotifyData;
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typedef gpointer GCallback;
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typedef void (*GClosureNotify) (gpointer data,
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GClosure *closure);
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typedef void (*GClosureMarshal) (GClosure *closure,
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guint invocation_hint,
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GValue *return_value,
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guint n_param_values,
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const GValue *param_values,
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gpointer marshal_data);
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typedef struct _GCClosure GCClosure;
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/* --- structures --- */
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struct _GClosureNotifyData
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{
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gpointer data;
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GClosureNotify notify;
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};
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struct _GClosure
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{
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/*< private >*/ guint ref_count : 15;
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/*< private >*/ guint meta_marshal : 1;
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/*< private >*/ guint n_guards : 1;
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/*< private >*/ guint n_fnotifiers : 2; /* finalization notifiers */
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/*< private >*/ guint n_inotifiers : 8; /* invalidation notifiers */
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/*< private >*/ guint in_inotify : 1;
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/*< private >*/ guint floating : 1;
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/*< protected >*/ guint derivative_flag : 1;
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/*< puplic >*/ guint in_marshal : 1;
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/*< public >*/ guint is_invalid : 1;
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/*< private >*/ void (*marshal) (GClosure *closure,
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guint invocation_hint,
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GValue /*out*/ *return_value,
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guint n_param_values,
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const GValue *param_values,
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gpointer marshal_data);
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/*< protected >*/ gpointer data;
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/*< private >*/ GClosureNotifyData *notifiers;
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/* invariants/constrains:
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* - ->marshal and ->data are _invalid_ as soon as ->is_invalid==TRUE
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* - invocation of all inotifiers occours prior to fnotifiers
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* - order of inotifiers is random
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* inotifiers may _not_ free/invalidate parameter values (e.g. ->data)
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* - order of fnotifiers is random
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* - notifiers may only be removed before or during their invocation
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* - reference counting may only happen prior to fnotify invocation
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* (in that sense, fnotifiers are really finalization handlers)
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*/
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};
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/* closure for C function calls, callback() is the user function
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*/
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struct _GCClosure
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{
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GClosure closure;
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gpointer callback;
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};
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/* --- prototypes --- */
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GClosure* g_cclosure_new (GCallback callback_func,
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gpointer user_data,
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GClosureNotify destroy_data);
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GClosure* g_cclosure_new_swap (GCallback callback_func,
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gpointer user_data,
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GClosureNotify destroy_data);
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GClosure* g_signal_type_closure_new (GType itype,
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guint struct_offset);
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/* --- prototypes --- */
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GClosure* g_closure_ref (GClosure *closure);
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void g_closure_unref (GClosure *closure);
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/* intimidating */
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GClosure* g_closure_new_simple (guint sizeof_closure,
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gpointer data);
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void g_closure_add_fnotify (GClosure *closure,
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gpointer notify_data,
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GClosureNotify notify_func);
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void g_closure_remove_fnotify (GClosure *closure,
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gpointer notify_data,
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GClosureNotify notify_func);
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void g_closure_add_inotify (GClosure *closure,
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gpointer notify_data,
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GClosureNotify notify_func);
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void g_closure_remove_inotify (GClosure *closure,
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gpointer notify_data,
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GClosureNotify notify_func);
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void g_closure_add_marshal_guards (GClosure *closure,
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gpointer pre_marshal_data,
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GClosureNotify pre_marshal_notify,
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gpointer post_marshal_data,
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GClosureNotify post_marshal_notify);
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void g_closure_set_marshal (GClosure *closure,
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GClosureMarshal marshal);
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void g_closure_set_meta_marshal (GClosure *closure,
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gpointer marshal_data,
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GClosureMarshal meta_marshal);
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void g_closure_invalidate (GClosure *closure);
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void g_closure_invoke (GClosure *closure,
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guint invocation_hint,
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GValue /*out*/ *return_value,
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guint n_param_values,
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const GValue *param_values);
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/*
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data_object::destroy -> closure_invalidate();
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closure_invalidate() -> disconnect(closure);
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disconnect(closure) -> (unlink) closure_unref();
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closure_finalize() -> g_free (data_string);
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1) need GObject and GType in glib
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2) need GParam
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3) need to resolve dtor cycles
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4) need GSignal move
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5) destroy on last caller ref or last data ref?
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random remarks:
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- don't mandate signals for GObject
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- OTOH, don't mandate GObject for GSignal
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- need marshaller repo with decent aliasing to base types
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- provide marshaller collection, virtually covering anything out there
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- at that point, still need GSignalCMarhsaller to g_signal_new() ?
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- can we combine varargs collect mechanisms with marshaller stubs?
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for out values (i.e. returntypes), that might get rid of the following
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point...
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- char* return signals with connections ala:
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connect({ return "static data that can't work"; }),
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connect({ return g_strdup ("properly duplicated string"); })
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won't work anymore. CRASH
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problems:
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- accumulator needs gboolean to indicate EMISSION_STOP
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- accumulator needs data
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*/
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __G_CLOSURE_H__ */
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