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  +   ˆl–ß=¿Jõ!¶e@·pNÜjbÑ¿Á„@'ÿ_†I|¥+ÁÀ +    /* GObject - GLib Type, Object, Parameter and Signal Library
 * Copyright (C) 2000-2001 Red Hat, Inc.
 * Copyright (C) 2005 Imendio AB
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General
 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __G_CLOSURE_H__
#define __G_CLOSURE_H__

#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
#error "Only <glib-object.h> can be included directly."
#endif

#include        <gobject/gtype.h>

G_BEGIN_DECLS

/* --- defines --- */
/**
 * G_CLOSURE_NEEDS_MARSHAL:
 * @closure: a #GClosure
 * 
 * Check if the closure still needs a marshaller. See g_closure_set_marshal().
 *
 * Returns: %TRUE if a #GClosureMarshal marshaller has not yet been set on 
 * @closure.
 */
#define	G_CLOSURE_NEEDS_MARSHAL(closure) (((GClosure*) (closure))->marshal == NULL)
/**
 * G_CLOSURE_N_NOTIFIERS:
 * @cl: a #GClosure
 * 
 * Get the total number of notifiers connected with the closure @cl. 
 * The count includes the meta marshaller, the finalize and invalidate notifiers 
 * and the marshal guards. Note that each guard counts as two notifiers. 
 * See g_closure_set_meta_marshal(), g_closure_add_finalize_notifier(),
 * g_closure_add_invalidate_notifier() and g_closure_add_marshal_guards().
 *
 * Returns: number of notifiers
 */
#define	G_CLOSURE_N_NOTIFIERS(cl)	 (((cl)->n_guards << 1L) + \
                                          (cl)->n_fnotifiers + (cl)->n_inotifiers)
/**
 * G_CCLOSURE_SWAP_DATA:
 * @cclosure: a #GCClosure
 * 
 * Checks whether the user data of the #GCClosure should be passed as the
 * first parameter to the callback. See g_cclosure_new_swap().
 *
 * Returns: %TRUE if data has to be swapped.
 */
#define	G_CCLOSURE_SWAP_DATA(cclosure)	 (((GClosure*) (cclosure))->derivative_flag)
/**
 * G_CALLBACK:
 * @f: a function pointer.
 * 
 * Cast a function pointer to a #GCallback.
 */
#define	G_CALLBACK(f)			 ((GCallback) (f))


/* -- typedefs --- */
typedef struct _GClosure		 GClosure;
typedef struct _GClosureNotifyData	 GClosureNotifyData;

/**
 * GCallback:
 * 
 * The type used for callback functions in structure definitions and function 
 * signatures. This doesn't mean that all callback functions must take no 
 * parameters and return void. The required signature of a callback function 
 * is determined by the context in which is used (e.g. the signal to which it 
 * is connected). Use G_CALLBACK() to cast the callback function to a #GCallback. 
 */
typedef void  (*GCallback)              (void);
/**
 * GClosureNotify:
 * @data: data specified when registering the notification callback
 * @closure: the #GClosure on which the notification is emitted
 * 
 * The type used for the various notification callbacks which can be registered
 * on closures.
 */
typedef void  (*GClosureNotify)		(gpointer	 data,
					 GClosure	*closure);
/**
 * GClosureMarshal:
 * @closure: the #GClosure to which the marshaller belongs
 * @return_value: (nullable): 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: (array length=n_param_values): an array of
 *  #GValues holding the arguments on which to invoke the
 *  callback of @closure
 * @invocation_hint: (nullable): the invocation hint given as the
 *  last argument to g_closure_invoke()
 * @marshal_data: (nullable): additional data specified when
 *  registering the marshaller, see g_closur