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4b71be0ef0
Dealing with FFI and return values is very tricky; this API allows sharing the bits to do it between gobject-introspection and gjs (and potentially other FFI binding consumers). **NOTE** I swapped the order of the arguments, under the premise that out arguments should generally be last. https://bugzilla.gnome.org/show_bug.cgi?id=668902
81 lines
3.1 KiB
C
81 lines
3.1 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
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* GObject introspection: Helper functions for ffi integration
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*
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* Copyright (C) 2008 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 Public
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* 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 __GIRFFI_H__
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#define __GIRFFI_H__
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#include <ffi.h>
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#include "girepository.h"
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G_BEGIN_DECLS
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typedef void (*GIFFIClosureCallback) (ffi_cif *,
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void *,
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void **,
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void *);
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/**
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* GIFunctionInvoker:
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* @cif: the cif
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* @native_address: the native adress
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*/
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typedef struct _GIFunctionInvoker GIFunctionInvoker;
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struct _GIFunctionInvoker {
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ffi_cif cif;
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gpointer native_address;
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/* <private> */
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gpointer padding[3];
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};
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typedef GIArgument GIFFIReturnValue;
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ffi_type * gi_type_tag_get_ffi_type (GITypeTag type_tag, gboolean is_pointer);
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ffi_type * g_type_info_get_ffi_type (GITypeInfo *info);
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void gi_type_info_extract_ffi_return_value (GITypeInfo *return_info,
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GIFFIReturnValue *ffi_value,
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GIArgument *arg);
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gboolean g_function_info_prep_invoker (GIFunctionInfo *info,
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GIFunctionInvoker *invoker,
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GError **error);
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gboolean g_function_invoker_new_for_address (gpointer addr,
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GICallableInfo *info,
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GIFunctionInvoker *invoker,
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GError **error);
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void g_function_invoker_destroy (GIFunctionInvoker *invoker);
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ffi_closure * g_callable_info_prepare_closure (GICallableInfo *callable_info,
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ffi_cif *cif,
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GIFFIClosureCallback callback,
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gpointer user_data);
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void g_callable_info_free_closure (GICallableInfo *callable_info,
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ffi_closure *closure);
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G_END_DECLS
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#endif /* __GIRFFI_H__ */
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