glib/girepository/girffi.h
2024-01-16 18:40:37 +01:00

129 lines
4.7 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
* GObject introspection: Helper functions for ffi integration
*
* Copyright (C) 2008 Red Hat, Inc
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* 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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#pragma once
#if !defined (__GIREPOSITORY_H_INSIDE__) && !defined (GI_COMPILATION)
#error "Only <girepository.h> can be included directly."
#endif
#include <ffi.h>
#include "girepository.h"
G_BEGIN_DECLS
/**
* GIFFIClosureCallback:
* @cif: the `ffi_cif` passed to
* [method@GIRepository.CallableInfo.create_closure]
* @ret: (out caller-allocates): a pointer to the memory used for the functions
* return value
* @args: a vector of pointers to memory holding the arguments to the function
* @user_data: the user data passed to
* [method@GIRepository.CallableInfo.create_closure]
*
* The function which will be called when a closure created with
* [method@GIRepository.CallableInfo.create_closure] is invoked.
*
* The value of @ret is undefined if the function returns `void`.
*
* Since: 2.80
*/
typedef void (*GIFFIClosureCallback) (ffi_cif *cif,
void *ret,
void **args,
void *user_data);
/**
* GIFunctionInvoker:
* @cif: the cif
* @native_address: the native address
*
* Structure containing the data necessary to invoke a callable function.
*
* Since: 2.80
*/
typedef struct {
ffi_cif cif;
void *native_address;
/*< private >*/
void *padding[3];
} GIFunctionInvoker;
/**
* GIFFIReturnValue:
*
* The type of a return value from a callable invocation closure.
*
* Since: 2.80
*/
typedef GIArgument GIFFIReturnValue;
GI_AVAILABLE_IN_ALL
ffi_type * gi_type_tag_get_ffi_type (GITypeTag type_tag, gboolean is_pointer);
GI_AVAILABLE_IN_ALL
ffi_type * gi_type_info_get_ffi_type (GITypeInfo *info);
GI_AVAILABLE_IN_ALL
void gi_type_info_extract_ffi_return_value (GITypeInfo *return_info,
GIFFIReturnValue *ffi_value,
GIArgument *arg);
GI_AVAILABLE_IN_ALL
void gi_type_tag_extract_ffi_return_value (GITypeTag return_tag,
GIInfoType interface_type,
GIFFIReturnValue *ffi_value,
GIArgument *arg);
GI_AVAILABLE_IN_ALL
gboolean gi_function_info_prep_invoker (GIFunctionInfo *info,
GIFunctionInvoker *invoker,
GError **error);
GI_AVAILABLE_IN_ALL
gboolean gi_function_invoker_new_for_address (void *addr,
GICallableInfo *info,
GIFunctionInvoker *invoker,
GError **error);
GI_AVAILABLE_IN_ALL
void gi_function_invoker_destroy (GIFunctionInvoker *invoker);
GI_AVAILABLE_IN_ALL
ffi_closure * gi_callable_info_create_closure (GICallableInfo *callable_info,
ffi_cif *cif,
GIFFIClosureCallback callback,
void *user_data);
GI_AVAILABLE_IN_ALL
void ** gi_callable_info_get_closure_native_address (GICallableInfo *callable_info,
ffi_closure *closure);
GI_AVAILABLE_IN_ALL
void gi_callable_info_destroy_closure (GICallableInfo *callable_info,
ffi_closure *closure);
G_END_DECLS