author | William Roberts <williamr@symbian.org> |
Fri, 23 Jul 2010 16:09:54 +0100 | |
branch | GCC_SURGE |
changeset 47 | d7383dba13ba |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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/* GObject - GLib Type, Object, Parameter and Signal Library |
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* Copyright (C) 2000-2001 Red Hat, Inc. |
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* Copyright (C) 2005 Imendio AB |
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* Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
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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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#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION) |
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#error "Only <glib-object.h> can be included directly." |
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#endif |
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#ifndef __G_CLOSURE_H__ |
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#define __G_CLOSURE_H__ |
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#include <_ansi.h> |
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#include <gobject/gtype.h> |
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G_BEGIN_DECLS |
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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_CLOSURE_N_NOTIFIERS(cl) ((cl)->meta_marshal + ((cl)->n_guards << 1L) + \ |
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(cl)->n_fnotifiers + (cl)->n_inotifiers) |
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#define G_CCLOSURE_SWAP_DATA(cclosure) (((GClosure*) (closure))->derivative_flag) |
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#define G_CALLBACK(f) ((GCallback) (f)) |
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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 void (*GCallback) (void); |
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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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GValue *return_value, |
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guint n_param_values, |
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const GValue *param_values, |
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gpointer invocation_hint, |
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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 >*/ |
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volatile guint ref_count : 15; |
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volatile guint meta_marshal : 1; |
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volatile guint n_guards : 1; |
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volatile guint n_fnotifiers : 2; /* finalization notifiers */ |
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volatile guint n_inotifiers : 8; /* invalidation notifiers */ |
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volatile guint in_inotify : 1; |
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volatile guint floating : 1; |
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/*< protected >*/ |
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volatile guint derivative_flag : 1; |
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/*< public >*/ |
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volatile guint in_marshal : 1; |
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volatile guint is_invalid : 1; |
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/*< private >*/ void (*marshal) (GClosure *closure, |
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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 invocation_hint, |
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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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* - each notifier may only be removed before or during its 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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106 |
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107 |
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/* --- prototypes --- */ |
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IMPORT_C 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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IMPORT_C 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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IMPORT_C GClosure* g_signal_type_cclosure_new (GType itype, |
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guint struct_offset); |
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117 |
|
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118 |
|
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/* --- prototypes --- */ |
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IMPORT_C GClosure* g_closure_ref (GClosure *closure); |
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IMPORT_C void g_closure_sink (GClosure *closure); |
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IMPORT_C void g_closure_unref (GClosure *closure); |
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/* intimidating */ |
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IMPORT_C GClosure* g_closure_new_simple (guint sizeof_closure, |
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gpointer data); |
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IMPORT_C void g_closure_add_finalize_notifier (GClosure *closure, |
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gpointer notify_data, |
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GClosureNotify notify_func); |
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IMPORT_C void g_closure_remove_finalize_notifier (GClosure *closure, |
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gpointer notify_data, |
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GClosureNotify notify_func); |
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IMPORT_C void g_closure_add_invalidate_notifier (GClosure *closure, |
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gpointer notify_data, |
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GClosureNotify notify_func); |
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IMPORT_C void g_closure_remove_invalidate_notifier (GClosure *closure, |
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gpointer notify_data, |
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GClosureNotify notify_func); |
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IMPORT_C 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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IMPORT_C void g_closure_set_marshal (GClosure *closure, |
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GClosureMarshal marshal); |
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IMPORT_C 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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IMPORT_C void g_closure_invalidate (GClosure *closure); |
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IMPORT_C void g_closure_invoke (GClosure *closure, |
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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 invocation_hint); |
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|
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/* FIXME: |
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OK: data_object::destroy -> closure_invalidate(); |
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MIS: closure_invalidate() -> disconnect(closure); |
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MIS: disconnect(closure) -> (unlink) closure_unref(); |
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OK: closure_finalize() -> g_free (data_string); |
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|
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random remarks: |
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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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*/ |
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G_END_DECLS |
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|
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#endif /* __G_CLOSURE_H__ */ |