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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@21245 72102866-910b-0410-8b05-ffd578937521
127 lines
4.1 KiB
Text
127 lines
4.1 KiB
Text
/* Interface for functions that dissect/make method calls
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Copyright (C) 1994, 1996, 1998 Free Software Foundation, Inc.
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Written by: Andrew Kachites McCallum <mccallum@gnu.ai.mit.edu>
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Created: Oct 1994
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This file is part of the GNUstep Base Library.
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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 Library 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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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111 USA.
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*/
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#ifndef __mframe_h_GNUSTEP_BASE_INCLUDE
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#define __mframe_h_GNUSTEP_BASE_INCLUDE
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#include "GNUstepBase/preface.h"
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#include "GNUstepBase/DistributedObjects.h"
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/* For NSArgumentInfo we include NSMethodSignature.h */
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#include "Foundation/NSMethodSignature.h"
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#if NeXT_runtime
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typedef union {
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char *arg_ptr;
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char arg_regs[sizeof (char*)];
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} *arglist_t;
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#endif
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/* These functions are used to pull apart method calls, and put them
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back together again. They are useful for things like distributed
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objects, and cross-language communication glue between Objective C
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and other languages. */
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/* xxx Currently these function only work with the GNU Objective C
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runtime, not the NeXT runtime. */
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/* Extract the arguments to a method call, as found in ARGFRAME,
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according to type string TYPES, and encode them by calling ENCODER.
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Return YES if and only if the method has some pass-by-reference
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arguments. */
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BOOL
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mframe_dissect_call (arglist_t argframe, const char *types,
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void (*encoder)(DOContext*), DOContext *ctxt);
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/* Decode the arguments to a method call by calling DECODER, knowing
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what to decode by looking at type string ENCODED_TYPES. Build an
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argframe of type arglist_t, and invoke the method. Then encode the
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return value and the pass-by-reference values using ENCODER. */
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void
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mframe_do_call (DOContext *ctxt,
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void(*decoder)(DOContext*),
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void(*encoder)(DOContext*));
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/* Decode the return value and pass-by-reference arguments using
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DECODER, knowning what to decode by looking at type string TYPES
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and OUT_PARAMETERS, and put then into ARGFRAME. Return the
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retval_t structure that can be passed to __builtin_return(). */
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retval_t
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mframe_build_return (arglist_t argframe, const char *types,
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BOOL out_parameters,
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void(*decoder)(DOContext*), DOContext *ctxt);
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/*
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* Copy the return value from retframe into the specified buffer.
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*/
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BOOL
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mframe_decode_return(const char *type, void* buffer, void* retframe);
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/*
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* Return the value of the specified type in 'retval' using argFrame.
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*/
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void*
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mframe_handle_return(const char* type, void* retval, arglist_t argFrame);
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/*
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* Step through method encoding information extracting details.
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*/
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const char *
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mframe_next_arg(const char *typePtr, NSArgumentInfo *info);
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/*
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* Generate method encoding with stack/register offsets from a simple
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* type encoding string. Store results in 'buf' or allocate memory
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* using objc_malloc() if 'buf' is a nul pointer.
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*/
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char*
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mframe_build_signature(const char *typePtr, int *size, int *narg, char *buf);
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arglist_t
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mframe_create_argframe(const char *types, void** retbuf);
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void
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mframe_destroy_argframe(const char *types, arglist_t argframe);
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#define ROUND(V, A) \
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({ typeof(V) __v=(V); typeof(A) __a=(A); \
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__a*((__v+__a-1)/__a); })
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int method_types_get_sizeof_arguments (struct objc_method* mth);
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char* method_types_get_next_argument (arglist_t argf, const char **type);
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char* method_types_get_first_argument (struct objc_method* m,
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arglist_t argframe,
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const char** type);
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