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4bc9654c63
The g_object_bind_property_with_closures() function should set a marshaller if the two GClosures don't have one already. This simplifies the caller code and avoids duplication. We need to add a new marshaller to the gmarshal.list matching the signature of the GBindingTransformFunc function.
1254 lines
44 KiB
C
1254 lines
44 KiB
C
/* 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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*
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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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/*
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* MT safe with regards to reference counting.
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*/
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#include "config.h"
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#include <string.h>
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#include "gclosure.h"
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#include "gvalue.h"
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/**
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* SECTION:gclosure
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* @short_description: Functions as first-class objects
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* @title: Closures
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*
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* A #GClosure represents a callback supplied by the programmer. It
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* will generally comprise a function of some kind and a marshaller
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* used to call it. It is the reponsibility of the marshaller to
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* convert the arguments for the invocation from #GValue<!-- -->s into
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* a suitable form, perform the callback on the converted arguments,
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* and transform the return value back into a #GValue.
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*
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* In the case of C programs, a closure usually just holds a pointer
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* to a function and maybe a data argument, and the marshaller
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* converts between #GValue<!-- --> and native C types. The GObject
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* library provides the #GCClosure type for this purpose. Bindings for
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* other languages need marshallers which convert between #GValue<!--
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* -->s and suitable representations in the runtime of the language in
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* order to use functions written in that languages as callbacks.
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*
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* Within GObject, closures play an important role in the
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* implementation of signals. When a signal is registered, the
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* @c_marshaller argument to g_signal_new() specifies the default C
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* marshaller for any closure which is connected to this
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* signal. GObject provides a number of C marshallers for this
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* purpose, see the g_cclosure_marshal_*() functions. Additional C
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* marshallers can be generated with the <link
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* linkend="glib-genmarshal">glib-genmarshal</link> utility. Closures
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* can be explicitly connected to signals with
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* g_signal_connect_closure(), but it usually more convenient to let
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* GObject create a closure automatically by using one of the
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* g_signal_connect_*() functions which take a callback function/user
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* data pair.
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*
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* Using closures has a number of important advantages over a simple
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* callback function/data pointer combination:
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* <itemizedlist>
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* <listitem><para>
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* Closures allow the callee to get the types of the callback parameters,
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* which means that language bindings don't have to write individual glue
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* for each callback type.
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* </para></listitem>
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* <listitem><para>
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* The reference counting of #GClosure makes it easy to handle reentrancy
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* right; if a callback is removed while it is being invoked, the closure
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* and its parameters won't be freed until the invocation finishes.
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* </para></listitem>
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* <listitem><para>
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* g_closure_invalidate() and invalidation notifiers allow callbacks to be
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* automatically removed when the objects they point to go away.
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* </para></listitem>
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* </itemizedlist>
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*/
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#define CLOSURE_MAX_REF_COUNT ((1 << 15) - 1)
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#define CLOSURE_MAX_N_GUARDS ((1 << 1) - 1)
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#define CLOSURE_MAX_N_FNOTIFIERS ((1 << 2) - 1)
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#define CLOSURE_MAX_N_INOTIFIERS ((1 << 8) - 1)
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#define CLOSURE_N_MFUNCS(cl) ((cl)->meta_marshal + \
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((cl)->n_guards << 1L))
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/* same as G_CLOSURE_N_NOTIFIERS() (keep in sync) */
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#define CLOSURE_N_NOTIFIERS(cl) (CLOSURE_N_MFUNCS (cl) + \
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(cl)->n_fnotifiers + \
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(cl)->n_inotifiers)
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typedef union {
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GClosure closure;
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volatile gint vint;
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} ClosureInt;
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#define CHANGE_FIELD(_closure, _field, _OP, _value, _must_set, _SET_OLD, _SET_NEW) \
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G_STMT_START { \
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ClosureInt *cunion = (ClosureInt*) _closure; \
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gint new_int, old_int, success; \
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do \
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{ \
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ClosureInt tmp; \
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tmp.vint = old_int = cunion->vint; \
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_SET_OLD tmp.closure._field; \
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tmp.closure._field _OP _value; \
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_SET_NEW tmp.closure._field; \
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new_int = tmp.vint; \
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success = g_atomic_int_compare_and_exchange (&cunion->vint, old_int, new_int); \
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} \
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while (!success && _must_set); \
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} G_STMT_END
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#define SWAP(_closure, _field, _value, _oldv) CHANGE_FIELD (_closure, _field, =, _value, TRUE, *(_oldv) =, (void) )
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#define SET(_closure, _field, _value) CHANGE_FIELD (_closure, _field, =, _value, TRUE, (void), (void) )
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#define INC(_closure, _field) CHANGE_FIELD (_closure, _field, +=, 1, TRUE, (void), (void) )
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#define INC_ASSIGN(_closure, _field, _newv) CHANGE_FIELD (_closure, _field, +=, 1, TRUE, (void), *(_newv) = )
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#define DEC(_closure, _field) CHANGE_FIELD (_closure, _field, -=, 1, TRUE, (void), (void) )
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#define DEC_ASSIGN(_closure, _field, _newv) CHANGE_FIELD (_closure, _field, -=, 1, TRUE, (void), *(_newv) = )
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#if 0 /* for non-thread-safe closures */
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#define SWAP(cl,f,v,o) (void) (*(o) = cl->f, cl->f = v)
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#define SET(cl,f,v) (void) (cl->f = v)
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#define INC(cl,f) (void) (cl->f += 1)
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#define INC_ASSIGN(cl,f,n) (void) (cl->f += 1, *(n) = cl->f)
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#define DEC(cl,f) (void) (cl->f -= 1)
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#define DEC_ASSIGN(cl,f,n) (void) (cl->f -= 1, *(n) = cl->f)
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#endif
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enum {
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FNOTIFY,
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INOTIFY,
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PRE_NOTIFY,
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POST_NOTIFY
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};
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/* --- functions --- */
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/**
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* g_closure_new_simple:
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* @sizeof_closure: the size of the structure to allocate, must be at least
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* <literal>sizeof (GClosure)</literal>
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* @data: data to store in the @data field of the newly allocated #GClosure
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*
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* Allocates a struct of the given size and initializes the initial
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* part as a #GClosure. This function is mainly useful when
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* implementing new types of closures.
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*
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* |[
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* typedef struct _MyClosure MyClosure;
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* struct _MyClosure
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* {
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* GClosure closure;
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* // extra data goes here
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* };
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*
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* static void
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* my_closure_finalize (gpointer notify_data,
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* GClosure *closure)
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* {
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* MyClosure *my_closure = (MyClosure *)closure;
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*
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* // free extra data here
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* }
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*
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* MyClosure *my_closure_new (gpointer data)
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* {
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* GClosure *closure;
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* MyClosure *my_closure;
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*
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* closure = g_closure_new_simple (sizeof (MyClosure), data);
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* my_closure = (MyClosure *) closure;
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*
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* // initialize extra data here
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*
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* g_closure_add_finalize_notifier (closure, notify_data,
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* my_closure_finalize);
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* return my_closure;
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* }
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* ]|
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*
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* Returns: a newly allocated #GClosure
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*/
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GClosure*
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g_closure_new_simple (guint sizeof_closure,
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gpointer data)
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{
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GClosure *closure;
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g_return_val_if_fail (sizeof_closure >= sizeof (GClosure), NULL);
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closure = g_malloc0 (sizeof_closure);
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SET (closure, ref_count, 1);
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SET (closure, meta_marshal, 0);
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SET (closure, n_guards, 0);
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SET (closure, n_fnotifiers, 0);
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SET (closure, n_inotifiers, 0);
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SET (closure, in_inotify, FALSE);
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SET (closure, floating, TRUE);
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SET (closure, derivative_flag, 0);
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SET (closure, in_marshal, FALSE);
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SET (closure, is_invalid, FALSE);
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closure->marshal = NULL;
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closure->data = data;
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closure->notifiers = NULL;
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memset (G_STRUCT_MEMBER_P (closure, sizeof (*closure)), 0, sizeof_closure - sizeof (*closure));
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return closure;
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}
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static inline void
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closure_invoke_notifiers (GClosure *closure,
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guint notify_type)
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{
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/* notifier layout:
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* meta_marshal n_guards n_guards n_fnotif. n_inotifiers
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* ->[[meta_marshal][pre_guards][post_guards][fnotifiers][inotifiers]]
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*
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* CLOSURE_N_MFUNCS(cl) = meta_marshal + n_guards + n_guards;
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* CLOSURE_N_NOTIFIERS(cl) = CLOSURE_N_MFUNCS(cl) + n_fnotifiers + n_inotifiers
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*
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* constrains/catches:
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* - closure->notifiers may be reloacted during callback
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* - closure->n_fnotifiers and closure->n_inotifiers may change during callback
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* - i.e. callbacks can be removed/added during invocation
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* - must prepare for callback removal during FNOTIFY and INOTIFY (done via ->marshal= & ->data=)
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* - must distinguish (->marshal= & ->data=) for INOTIFY vs. FNOTIFY (via ->in_inotify)
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* + closure->n_guards is const during PRE_NOTIFY & POST_NOTIFY
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* + closure->meta_marshal is const for all cases
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* + none of the callbacks can cause recursion
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* + closure->n_inotifiers is const 0 during FNOTIFY
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*/
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switch (notify_type)
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{
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GClosureNotifyData *ndata;
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guint i, offs;
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case FNOTIFY:
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while (closure->n_fnotifiers)
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{
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guint n;
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DEC_ASSIGN (closure, n_fnotifiers, &n);
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ndata = closure->notifiers + CLOSURE_N_MFUNCS (closure) + n;
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closure->marshal = (GClosureMarshal) ndata->notify;
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closure->data = ndata->data;
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ndata->notify (ndata->data, closure);
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}
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closure->marshal = NULL;
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closure->data = NULL;
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break;
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case INOTIFY:
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SET (closure, in_inotify, TRUE);
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while (closure->n_inotifiers)
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{
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guint n;
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DEC_ASSIGN (closure, n_inotifiers, &n);
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ndata = closure->notifiers + CLOSURE_N_MFUNCS (closure) + closure->n_fnotifiers + n;
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closure->marshal = (GClosureMarshal) ndata->notify;
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closure->data = ndata->data;
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ndata->notify (ndata->data, closure);
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}
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closure->marshal = NULL;
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closure->data = NULL;
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SET (closure, in_inotify, FALSE);
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break;
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case PRE_NOTIFY:
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i = closure->n_guards;
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offs = closure->meta_marshal;
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while (i--)
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{
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ndata = closure->notifiers + offs + i;
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ndata->notify (ndata->data, closure);
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}
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break;
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case POST_NOTIFY:
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i = closure->n_guards;
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offs = closure->meta_marshal + i;
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while (i--)
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{
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ndata = closure->notifiers + offs + i;
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ndata->notify (ndata->data, closure);
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}
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break;
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}
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}
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/**
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* g_closure_set_meta_marshal:
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* @closure: a #GClosure
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* @marshal_data: context-dependent data to pass to @meta_marshal
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* @meta_marshal: a #GClosureMarshal function
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*
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* Sets the meta marshaller of @closure. A meta marshaller wraps
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* @closure->marshal and modifies the way it is called in some
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* fashion. The most common use of this facility is for C callbacks.
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* The same marshallers (generated by <link
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* linkend="glib-genmarshal">glib-genmarshal</link>) are used
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* everywhere, but the way that we get the callback function
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* differs. In most cases we want to use @closure->callback, but in
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* other cases we want to use some different technique to retrieve the
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* callback function.
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*
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* For example, class closures for signals (see
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* g_signal_type_cclosure_new()) retrieve the callback function from a
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* fixed offset in the class structure. The meta marshaller retrieves
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* the right callback and passes it to the marshaller as the
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* @marshal_data argument.
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*/
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void
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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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{
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GClosureNotifyData *notifiers;
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g_return_if_fail (closure != NULL);
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g_return_if_fail (meta_marshal != NULL);
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g_return_if_fail (closure->is_invalid == FALSE);
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g_return_if_fail (closure->in_marshal == FALSE);
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g_return_if_fail (closure->meta_marshal == 0);
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notifiers = closure->notifiers;
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closure->notifiers = g_renew (GClosureNotifyData, NULL, CLOSURE_N_NOTIFIERS (closure) + 1);
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if (notifiers)
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{
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/* usually the meta marshal will be setup right after creation, so the
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* g_memmove() should be rare-case scenario
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*/
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g_memmove (closure->notifiers + 1, notifiers, CLOSURE_N_NOTIFIERS (closure) * sizeof (notifiers[0]));
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g_free (notifiers);
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}
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closure->notifiers[0].data = marshal_data;
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closure->notifiers[0].notify = (GClosureNotify) meta_marshal;
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SET (closure, meta_marshal, 1);
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}
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/**
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* g_closure_add_marshal_guards:
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* @closure: a #GClosure
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* @pre_marshal_data: data to pass to @pre_marshal_notify
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* @pre_marshal_notify: a function to call before the closure callback
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* @post_marshal_data: data to pass to @post_marshal_notify
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* @post_marshal_notify: a function to call after the closure callback
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*
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* Adds a pair of notifiers which get invoked before and after the
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* closure callback, respectively. This is typically used to protect
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* the extra arguments for the duration of the callback. See
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* g_object_watch_closure() for an example of marshal guards.
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*/
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void
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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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{
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guint i;
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g_return_if_fail (closure != NULL);
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g_return_if_fail (pre_marshal_notify != NULL);
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g_return_if_fail (post_marshal_notify != NULL);
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g_return_if_fail (closure->is_invalid == FALSE);
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g_return_if_fail (closure->in_marshal == FALSE);
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g_return_if_fail (closure->n_guards < CLOSURE_MAX_N_GUARDS);
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closure->notifiers = g_renew (GClosureNotifyData, closure->notifiers, CLOSURE_N_NOTIFIERS (closure) + 2);
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if (closure->n_inotifiers)
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closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
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closure->n_fnotifiers +
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closure->n_inotifiers + 1)] = closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
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closure->n_fnotifiers + 0)];
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if (closure->n_inotifiers > 1)
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closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
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closure->n_fnotifiers +
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closure->n_inotifiers)] = closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
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closure->n_fnotifiers + 1)];
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if (closure->n_fnotifiers)
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closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
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closure->n_fnotifiers + 1)] = closure->notifiers[CLOSURE_N_MFUNCS (closure) + 0];
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if (closure->n_fnotifiers > 1)
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closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
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closure->n_fnotifiers)] = closure->notifiers[CLOSURE_N_MFUNCS (closure) + 1];
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if (closure->n_guards)
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closure->notifiers[(closure->meta_marshal +
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closure->n_guards +
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closure->n_guards + 1)] = closure->notifiers[closure->meta_marshal + closure->n_guards];
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i = closure->n_guards;
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closure->notifiers[closure->meta_marshal + i].data = pre_marshal_data;
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closure->notifiers[closure->meta_marshal + i].notify = pre_marshal_notify;
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closure->notifiers[closure->meta_marshal + i + 1].data = post_marshal_data;
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closure->notifiers[closure->meta_marshal + i + 1].notify = post_marshal_notify;
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INC (closure, n_guards);
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}
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/**
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* g_closure_add_finalize_notifier:
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* @closure: a #GClosure
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* @notify_data: data to pass to @notify_func
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* @notify_func: the callback function to register
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*
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* Registers a finalization notifier which will be called when the
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* reference count of @closure goes down to 0. Multiple finalization
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* notifiers on a single closure are invoked in unspecified order. If
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* a single call to g_closure_unref() results in the closure being
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* both invalidated and finalized, then the invalidate notifiers will
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* be run before the finalize notifiers.
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*/
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void
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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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{
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guint i;
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g_return_if_fail (closure != NULL);
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g_return_if_fail (notify_func != NULL);
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g_return_if_fail (closure->n_fnotifiers < CLOSURE_MAX_N_FNOTIFIERS);
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closure->notifiers = g_renew (GClosureNotifyData, closure->notifiers, CLOSURE_N_NOTIFIERS (closure) + 1);
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if (closure->n_inotifiers)
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closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
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closure->n_fnotifiers +
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closure->n_inotifiers)] = closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
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closure->n_fnotifiers + 0)];
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i = CLOSURE_N_MFUNCS (closure) + closure->n_fnotifiers;
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closure->notifiers[i].data = notify_data;
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closure->notifiers[i].notify = notify_func;
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INC (closure, n_fnotifiers);
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}
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/**
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* g_closure_add_invalidate_notifier:
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* @closure: a #GClosure
|
|
* @notify_data: data to pass to @notify_func
|
|
* @notify_func: the callback function to register
|
|
*
|
|
* Registers an invalidation notifier which will be called when the
|
|
* @closure is invalidated with g_closure_invalidate(). Invalidation
|
|
* notifiers are invoked before finalization notifiers, in an
|
|
* unspecified order.
|
|
*/
|
|
void
|
|
g_closure_add_invalidate_notifier (GClosure *closure,
|
|
gpointer notify_data,
|
|
GClosureNotify notify_func)
|
|
{
|
|
guint i;
|
|
|
|
g_return_if_fail (closure != NULL);
|
|
g_return_if_fail (notify_func != NULL);
|
|
g_return_if_fail (closure->is_invalid == FALSE);
|
|
g_return_if_fail (closure->n_inotifiers < CLOSURE_MAX_N_INOTIFIERS);
|
|
|
|
closure->notifiers = g_renew (GClosureNotifyData, closure->notifiers, CLOSURE_N_NOTIFIERS (closure) + 1);
|
|
i = CLOSURE_N_MFUNCS (closure) + closure->n_fnotifiers + closure->n_inotifiers;
|
|
closure->notifiers[i].data = notify_data;
|
|
closure->notifiers[i].notify = notify_func;
|
|
INC (closure, n_inotifiers);
|
|
}
|
|
|
|
static inline gboolean
|
|
closure_try_remove_inotify (GClosure *closure,
|
|
gpointer notify_data,
|
|
GClosureNotify notify_func)
|
|
{
|
|
GClosureNotifyData *ndata, *nlast;
|
|
|
|
nlast = closure->notifiers + CLOSURE_N_NOTIFIERS (closure) - 1;
|
|
for (ndata = nlast + 1 - closure->n_inotifiers; ndata <= nlast; ndata++)
|
|
if (ndata->notify == notify_func && ndata->data == notify_data)
|
|
{
|
|
DEC (closure, n_inotifiers);
|
|
if (ndata < nlast)
|
|
*ndata = *nlast;
|
|
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static inline gboolean
|
|
closure_try_remove_fnotify (GClosure *closure,
|
|
gpointer notify_data,
|
|
GClosureNotify notify_func)
|
|
{
|
|
GClosureNotifyData *ndata, *nlast;
|
|
|
|
nlast = closure->notifiers + CLOSURE_N_NOTIFIERS (closure) - closure->n_inotifiers - 1;
|
|
for (ndata = nlast + 1 - closure->n_fnotifiers; ndata <= nlast; ndata++)
|
|
if (ndata->notify == notify_func && ndata->data == notify_data)
|
|
{
|
|
DEC (closure, n_fnotifiers);
|
|
if (ndata < nlast)
|
|
*ndata = *nlast;
|
|
if (closure->n_inotifiers)
|
|
closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
|
|
closure->n_fnotifiers)] = closure->notifiers[(CLOSURE_N_MFUNCS (closure) +
|
|
closure->n_fnotifiers +
|
|
closure->n_inotifiers)];
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* g_closure_ref:
|
|
* @closure: #GClosure to increment the reference count on
|
|
*
|
|
* Increments the reference count on a closure to force it staying
|
|
* alive while the caller holds a pointer to it.
|
|
*
|
|
* Returns: The @closure passed in, for convenience
|
|
*/
|
|
GClosure*
|
|
g_closure_ref (GClosure *closure)
|
|
{
|
|
guint new_ref_count;
|
|
g_return_val_if_fail (closure != NULL, NULL);
|
|
g_return_val_if_fail (closure->ref_count > 0, NULL);
|
|
g_return_val_if_fail (closure->ref_count < CLOSURE_MAX_REF_COUNT, NULL);
|
|
|
|
INC_ASSIGN (closure, ref_count, &new_ref_count);
|
|
g_return_val_if_fail (new_ref_count > 1, NULL);
|
|
|
|
return closure;
|
|
}
|
|
|
|
/**
|
|
* g_closure_invalidate:
|
|
* @closure: GClosure to invalidate
|
|
*
|
|
* Sets a flag on the closure to indicate that its calling
|
|
* environment has become invalid, and thus causes any future
|
|
* invocations of g_closure_invoke() on this @closure to be
|
|
* ignored. Also, invalidation notifiers installed on the closure will
|
|
* be called at this point. Note that unless you are holding a
|
|
* reference to the closure yourself, the invalidation notifiers may
|
|
* unref the closure and cause it to be destroyed, so if you need to
|
|
* access the closure after calling g_closure_invalidate(), make sure
|
|
* that you've previously called g_closure_ref().
|
|
*
|
|
* Note that g_closure_invalidate() will also be called when the
|
|
* reference count of a closure drops to zero (unless it has already
|
|
* been invalidated before).
|
|
*/
|
|
void
|
|
g_closure_invalidate (GClosure *closure)
|
|
{
|
|
g_return_if_fail (closure != NULL);
|
|
|
|
if (!closure->is_invalid)
|
|
{
|
|
gboolean was_invalid;
|
|
g_closure_ref (closure); /* preserve floating flag */
|
|
SWAP (closure, is_invalid, TRUE, &was_invalid);
|
|
/* invalidate only once */
|
|
if (!was_invalid)
|
|
closure_invoke_notifiers (closure, INOTIFY);
|
|
g_closure_unref (closure);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* g_closure_unref:
|
|
* @closure: #GClosure to decrement the reference count on
|
|
*
|
|
* Decrements the reference count of a closure after it was previously
|
|
* incremented by the same caller. If no other callers are using the
|
|
* closure, then the closure will be destroyed and freed.
|
|
*/
|
|
void
|
|
g_closure_unref (GClosure *closure)
|
|
{
|
|
guint new_ref_count;
|
|
|
|
g_return_if_fail (closure != NULL);
|
|
g_return_if_fail (closure->ref_count > 0);
|
|
|
|
if (closure->ref_count == 1) /* last unref, invalidate first */
|
|
g_closure_invalidate (closure);
|
|
|
|
DEC_ASSIGN (closure, ref_count, &new_ref_count);
|
|
|
|
if (new_ref_count == 0)
|
|
{
|
|
closure_invoke_notifiers (closure, FNOTIFY);
|
|
g_free (closure->notifiers);
|
|
g_free (closure);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* g_closure_sink:
|
|
* @closure: #GClosure to decrement the initial reference count on, if it's
|
|
* still being held
|
|
*
|
|
* Takes over the initial ownership of a closure. Each closure is
|
|
* initially created in a <firstterm>floating</firstterm> state, which
|
|
* means that the initial reference count is not owned by any caller.
|
|
* g_closure_sink() checks to see if the object is still floating, and
|
|
* if so, unsets the floating state and decreases the reference
|
|
* count. If the closure is not floating, g_closure_sink() does
|
|
* nothing. The reason for the existance of the floating state is to
|
|
* prevent cumbersome code sequences like:
|
|
* |[
|
|
* closure = g_cclosure_new (cb_func, cb_data);
|
|
* g_source_set_closure (source, closure);
|
|
* g_closure_unref (closure); // XXX GObject doesn't really need this
|
|
* ]|
|
|
* Because g_source_set_closure() (and similar functions) take ownership of the
|
|
* initial reference count, if it is unowned, we instead can write:
|
|
* |[
|
|
* g_source_set_closure (source, g_cclosure_new (cb_func, cb_data));
|
|
* ]|
|
|
*
|
|
* Generally, this function is used together with g_closure_ref(). Ane example
|
|
* of storing a closure for later notification looks like:
|
|
* |[
|
|
* static GClosure *notify_closure = NULL;
|
|
* void
|
|
* foo_notify_set_closure (GClosure *closure)
|
|
* {
|
|
* if (notify_closure)
|
|
* g_closure_unref (notify_closure);
|
|
* notify_closure = closure;
|
|
* if (notify_closure)
|
|
* {
|
|
* g_closure_ref (notify_closure);
|
|
* g_closure_sink (notify_closure);
|
|
* }
|
|
* }
|
|
* ]|
|
|
*
|
|
* Because g_closure_sink() may decrement the reference count of a closure
|
|
* (if it hasn't been called on @closure yet) just like g_closure_unref(),
|
|
* g_closure_ref() should be called prior to this function.
|
|
*/
|
|
void
|
|
g_closure_sink (GClosure *closure)
|
|
{
|
|
g_return_if_fail (closure != NULL);
|
|
g_return_if_fail (closure->ref_count > 0);
|
|
|
|
/* floating is basically a kludge to avoid creating closures
|
|
* with a ref_count of 0. so the intial ref_count a closure has
|
|
* is unowned. with invoking g_closure_sink() code may
|
|
* indicate that it takes over that intiial ref_count.
|
|
*/
|
|
if (closure->floating)
|
|
{
|
|
gboolean was_floating;
|
|
SWAP (closure, floating, FALSE, &was_floating);
|
|
/* unref floating flag only once */
|
|
if (was_floating)
|
|
g_closure_unref (closure);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* g_closure_remove_invalidate_notifier:
|
|
* @closure: a #GClosure
|
|
* @notify_data: data which was passed to g_closure_add_invalidate_notifier()
|
|
* when registering @notify_func
|
|
* @notify_func: the callback function to remove
|
|
*
|
|
* Removes an invalidation notifier.
|
|
*
|
|
* Notice that notifiers are automatically removed after they are run.
|
|
*/
|
|
void
|
|
g_closure_remove_invalidate_notifier (GClosure *closure,
|
|
gpointer notify_data,
|
|
GClosureNotify notify_func)
|
|
{
|
|
g_return_if_fail (closure != NULL);
|
|
g_return_if_fail (notify_func != NULL);
|
|
|
|
if (closure->is_invalid && closure->in_inotify && /* account removal of notify_func() while it's called */
|
|
((gpointer) closure->marshal) == ((gpointer) notify_func) &&
|
|
closure->data == notify_data)
|
|
closure->marshal = NULL;
|
|
else if (!closure_try_remove_inotify (closure, notify_data, notify_func))
|
|
g_warning (G_STRLOC ": unable to remove uninstalled invalidation notifier: %p (%p)",
|
|
notify_func, notify_data);
|
|
}
|
|
|
|
/**
|
|
* g_closure_remove_finalize_notifier:
|
|
* @closure: a #GClosure
|
|
* @notify_data: data which was passed to g_closure_add_finalize_notifier()
|
|
* when registering @notify_func
|
|
* @notify_func: the callback function to remove
|
|
*
|
|
* Removes a finalization notifier.
|
|
*
|
|
* Notice that notifiers are automatically removed after they are run.
|
|
*/
|
|
void
|
|
g_closure_remove_finalize_notifier (GClosure *closure,
|
|
gpointer notify_data,
|
|
GClosureNotify notify_func)
|
|
{
|
|
g_return_if_fail (closure != NULL);
|
|
g_return_if_fail (notify_func != NULL);
|
|
|
|
if (closure->is_invalid && !closure->in_inotify && /* account removal of notify_func() while it's called */
|
|
((gpointer) closure->marshal) == ((gpointer) notify_func) &&
|
|
closure->data == notify_data)
|
|
closure->marshal = NULL;
|
|
else if (!closure_try_remove_fnotify (closure, notify_data, notify_func))
|
|
g_warning (G_STRLOC ": unable to remove uninstalled finalization notifier: %p (%p)",
|
|
notify_func, notify_data);
|
|
}
|
|
|
|
/**
|
|
* g_closure_invoke:
|
|
* @closure: a #GClosure
|
|
* @return_value: a #GValue to store the return value. May be %NULL if the
|
|
* callback of @closure doesn't return a value.
|
|
* @n_param_values: the length of the @param_values array
|
|
* @param_values: an array of #GValue<!-- -->s holding the arguments on
|
|
* which to invoke the callback of @closure
|
|
* @invocation_hint: a context-dependent invocation hint
|
|
*
|
|
* Invokes the closure, i.e. executes the callback represented by the @closure.
|
|
*/
|
|
void
|
|
g_closure_invoke (GClosure *closure,
|
|
GValue /*out*/ *return_value,
|
|
guint n_param_values,
|
|
const GValue *param_values,
|
|
gpointer invocation_hint)
|
|
{
|
|
g_return_if_fail (closure != NULL);
|
|
|
|
g_closure_ref (closure); /* preserve floating flag */
|
|
if (!closure->is_invalid)
|
|
{
|
|
GClosureMarshal marshal;
|
|
gpointer marshal_data;
|
|
gboolean in_marshal = closure->in_marshal;
|
|
|
|
g_return_if_fail (closure->marshal || closure->meta_marshal);
|
|
|
|
SET (closure, in_marshal, TRUE);
|
|
if (closure->meta_marshal)
|
|
{
|
|
marshal_data = closure->notifiers[0].data;
|
|
marshal = (GClosureMarshal) closure->notifiers[0].notify;
|
|
}
|
|
else
|
|
{
|
|
marshal_data = NULL;
|
|
marshal = closure->marshal;
|
|
}
|
|
if (!in_marshal)
|
|
closure_invoke_notifiers (closure, PRE_NOTIFY);
|
|
marshal (closure,
|
|
return_value,
|
|
n_param_values, param_values,
|
|
invocation_hint,
|
|
marshal_data);
|
|
if (!in_marshal)
|
|
closure_invoke_notifiers (closure, POST_NOTIFY);
|
|
SET (closure, in_marshal, in_marshal);
|
|
}
|
|
g_closure_unref (closure);
|
|
}
|
|
|
|
/**
|
|
* g_closure_set_marshal:
|
|
* @closure: a #GClosure
|
|
* @marshal: a #GClosureMarshal function
|
|
*
|
|
* Sets the marshaller of @closure. The <literal>marshal_data</literal>
|
|
* of @marshal provides a way for a meta marshaller to provide additional
|
|
* information to the marshaller. (See g_closure_set_meta_marshal().) For
|
|
* GObject's C predefined marshallers (the g_cclosure_marshal_*()
|
|
* functions), what it provides is a callback function to use instead of
|
|
* @closure->callback.
|
|
*/
|
|
void
|
|
g_closure_set_marshal (GClosure *closure,
|
|
GClosureMarshal marshal)
|
|
{
|
|
g_return_if_fail (closure != NULL);
|
|
g_return_if_fail (marshal != NULL);
|
|
|
|
if (closure->marshal && closure->marshal != marshal)
|
|
g_warning ("attempt to override closure->marshal (%p) with new marshal (%p)",
|
|
closure->marshal, marshal);
|
|
else
|
|
closure->marshal = marshal;
|
|
}
|
|
|
|
/**
|
|
* g_cclosure_new:
|
|
* @callback_func: the function to invoke
|
|
* @user_data: user data to pass to @callback_func
|
|
* @destroy_data: destroy notify to be called when @user_data is no longer used
|
|
*
|
|
* Creates a new closure which invokes @callback_func with @user_data as
|
|
* the last parameter.
|
|
*
|
|
* Returns: a new #GCClosure
|
|
*/
|
|
GClosure*
|
|
g_cclosure_new (GCallback callback_func,
|
|
gpointer user_data,
|
|
GClosureNotify destroy_data)
|
|
{
|
|
GClosure *closure;
|
|
|
|
g_return_val_if_fail (callback_func != NULL, NULL);
|
|
|
|
closure = g_closure_new_simple (sizeof (GCClosure), user_data);
|
|
if (destroy_data)
|
|
g_closure_add_finalize_notifier (closure, user_data, destroy_data);
|
|
((GCClosure*) closure)->callback = (gpointer) callback_func;
|
|
|
|
return closure;
|
|
}
|
|
|
|
/**
|
|
* g_cclosure_new_swap:
|
|
* @callback_func: the function to invoke
|
|
* @user_data: user data to pass to @callback_func
|
|
* @destroy_data: destroy notify to be called when @user_data is no longer used
|
|
*
|
|
* Creates a new closure which invokes @callback_func with @user_data as
|
|
* the first parameter.
|
|
*
|
|
* Returns: a new #GCClosure
|
|
*/
|
|
GClosure*
|
|
g_cclosure_new_swap (GCallback callback_func,
|
|
gpointer user_data,
|
|
GClosureNotify destroy_data)
|
|
{
|
|
GClosure *closure;
|
|
|
|
g_return_val_if_fail (callback_func != NULL, NULL);
|
|
|
|
closure = g_closure_new_simple (sizeof (GCClosure), user_data);
|
|
if (destroy_data)
|
|
g_closure_add_finalize_notifier (closure, user_data, destroy_data);
|
|
((GCClosure*) closure)->callback = (gpointer) callback_func;
|
|
SET (closure, derivative_flag, TRUE);
|
|
|
|
return closure;
|
|
}
|
|
|
|
static void
|
|
g_type_class_meta_marshal (GClosure *closure,
|
|
GValue /*out*/ *return_value,
|
|
guint n_param_values,
|
|
const GValue *param_values,
|
|
gpointer invocation_hint,
|
|
gpointer marshal_data)
|
|
{
|
|
GTypeClass *class;
|
|
gpointer callback;
|
|
/* GType itype = (GType) closure->data; */
|
|
guint offset = GPOINTER_TO_UINT (marshal_data);
|
|
|
|
class = G_TYPE_INSTANCE_GET_CLASS (g_value_peek_pointer (param_values + 0), itype, GTypeClass);
|
|
callback = G_STRUCT_MEMBER (gpointer, class, offset);
|
|
if (callback)
|
|
closure->marshal (closure,
|
|
return_value,
|
|
n_param_values, param_values,
|
|
invocation_hint,
|
|
callback);
|
|
}
|
|
|
|
static void
|
|
g_type_iface_meta_marshal (GClosure *closure,
|
|
GValue /*out*/ *return_value,
|
|
guint n_param_values,
|
|
const GValue *param_values,
|
|
gpointer invocation_hint,
|
|
gpointer marshal_data)
|
|
{
|
|
GTypeClass *class;
|
|
gpointer callback;
|
|
GType itype = (GType) closure->data;
|
|
guint offset = GPOINTER_TO_UINT (marshal_data);
|
|
|
|
class = G_TYPE_INSTANCE_GET_INTERFACE (g_value_peek_pointer (param_values + 0), itype, GTypeClass);
|
|
callback = G_STRUCT_MEMBER (gpointer, class, offset);
|
|
if (callback)
|
|
closure->marshal (closure,
|
|
return_value,
|
|
n_param_values, param_values,
|
|
invocation_hint,
|
|
callback);
|
|
}
|
|
|
|
/**
|
|
* g_signal_type_cclosure_new:
|
|
* @itype: the #GType identifier of an interface or classed type
|
|
* @struct_offset: the offset of the member function of @itype's class
|
|
* structure which is to be invoked by the new closure
|
|
*
|
|
* Creates a new closure which invokes the function found at the offset
|
|
* @struct_offset in the class structure of the interface or classed type
|
|
* identified by @itype.
|
|
*
|
|
* Returns: a new #GCClosure
|
|
*/
|
|
GClosure*
|
|
g_signal_type_cclosure_new (GType itype,
|
|
guint struct_offset)
|
|
{
|
|
GClosure *closure;
|
|
|
|
g_return_val_if_fail (G_TYPE_IS_CLASSED (itype) || G_TYPE_IS_INTERFACE (itype), NULL);
|
|
g_return_val_if_fail (struct_offset >= sizeof (GTypeClass), NULL);
|
|
|
|
closure = g_closure_new_simple (sizeof (GClosure), (gpointer) itype);
|
|
if (G_TYPE_IS_INTERFACE (itype))
|
|
g_closure_set_meta_marshal (closure, GUINT_TO_POINTER (struct_offset), g_type_iface_meta_marshal);
|
|
else
|
|
g_closure_set_meta_marshal (closure, GUINT_TO_POINTER (struct_offset), g_type_class_meta_marshal);
|
|
|
|
return closure;
|
|
}
|
|
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__VOID:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 1
|
|
* @param_values: a #GValue array holding only the instance
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__BOOLEAN:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #gboolean parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gboolean arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__CHAR:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #gchar parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gchar arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__UCHAR:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #guchar parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, guchar arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__INT:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #gint parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gint arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__UINT:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #guint parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, guint arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__LONG:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #glong parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, glong arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__ULONG:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #gulong parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gulong arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__ENUM:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the enumeration parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gint arg1, gpointer user_data)</literal> where the #gint parameter denotes an enumeration type..
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__FLAGS:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the flags parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gint arg1, gpointer user_data)</literal> where the #gint parameter denotes a flags type.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__FLOAT:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #gfloat parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gfloat arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__DOUBLE:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #gdouble parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gdouble arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__STRING:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #gchar* parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, const gchar *arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__PARAM:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #GParamSpec* parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, GParamSpec *arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__BOXED:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #GBoxed* parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, GBoxed *arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__POINTER:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #gpointer parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, gpointer arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__OBJECT:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #GObject* parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, GObject *arg1, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__VARIANT:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding the instance and the #GVariant* parameter
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, GVariant *arg1, gpointer user_data)</literal>.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_VOID__UINT_POINTER:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: ignored
|
|
* @n_param_values: 3
|
|
* @param_values: a #GValue array holding instance, arg1 and arg2
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>void (*callback) (gpointer instance, guint arg1, gpointer arg2, gpointer user_data)</literal>.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_BOOLEAN__FLAGS:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: a #GValue which can store the returned #gboolean
|
|
* @n_param_values: 2
|
|
* @param_values: a #GValue array holding instance and arg1
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>gboolean (*callback) (gpointer instance, gint arg1, gpointer user_data)</literal> where the #gint parameter
|
|
* denotes a flags type.
|
|
*/
|
|
|
|
/**
|
|
* g_cclosure_marshal_BOOL__FLAGS:
|
|
*
|
|
* Another name for g_cclosure_marshal_BOOLEAN__FLAGS().
|
|
*/
|
|
/**
|
|
* g_cclosure_marshal_STRING__OBJECT_POINTER:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: a #GValue, which can store the returned string
|
|
* @n_param_values: 3
|
|
* @param_values: a #GValue array holding instance, arg1 and arg2
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>gchar* (*callback) (gpointer instance, GObject *arg1, gpointer arg2, gpointer user_data)</literal>.
|
|
*/
|
|
/**
|
|
* g_cclosure_marshal_BOOLEAN__OBJECT_BOXED_BOXED:
|
|
* @closure: the #GClosure to which the marshaller belongs
|
|
* @return_value: a #GValue, which can store the returned string
|
|
* @n_param_values: 3
|
|
* @param_values: a #GValue array holding instance, arg1 and arg2
|
|
* @invocation_hint: the invocation hint given as the last argument
|
|
* to g_closure_invoke()
|
|
* @marshal_data: additional data specified when registering the marshaller
|
|
*
|
|
* A marshaller for a #GCClosure with a callback of type
|
|
* <literal>gboolean (*callback) (gpointer instance, GBoxed *arg1, GBoxed *arg2, gpointer user_data)</literal>.
|
|
*
|
|
* Since: 2.26
|
|
*/
|