| /* Hooks to abstract the runtime meta-data generation for Objective C. |
| Copyright (C) 2011-2015 Free Software Foundation, Inc. |
| Contributed by Iain Sandoe |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| GCC 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _OBJC_RUNTIME_HOOKS_H_ |
| #define _OBJC_RUNTIME_HOOKS_H_ |
| |
| /* A set of hooks for the front end to obtain runtime-specific actions. */ |
| |
| /* Objective-C supports several runtime library variants: |
| |
| "GNU" runtime selected by -fgnu-runtime (currently at ABI version 8). |
| "NeXT" runtime (selected by -fnext-runtime) and installed on OSX/Darwin |
| systems at API version 1 (for m32 code) and version 2 (for m64 code). |
| |
| The runtimes require different data types/layouts, method call mechanisms |
| and so on, and the purpose of this interface is to abstract such |
| differences from the parser's perspective. */ |
| |
| /* TODO: Do we want the initial underscore ? */ |
| typedef struct _objc_runtime_hooks_r |
| { |
| /* TODO: Expand comments in this file. */ |
| |
| /* Initialize for this runtime. */ |
| void (*initialize) (void); |
| const char *default_constant_string_class_name; |
| |
| /* FIXME: Having to check this name should not be necessary. */ |
| const char *tag_getclass; |
| /* id for superclass class field - named differently in the existing |
| runtimes. */ |
| tree (*super_superclassfield_ident) (void); |
| |
| /* Obtain a class decl for the identifier. */ |
| tree (*class_decl) (tree); |
| /* Obtain a metaclass decl for the identifier. */ |
| tree (*metaclass_decl) (tree); |
| /* Obtain a category decl for the identifier. */ |
| tree (*category_decl) (tree); |
| /* Obtain a protocol decl for the identifier. */ |
| tree (*protocol_decl) (tree); |
| /* Obtain a string decl, to be placed in the nominated string-section. */ |
| tree (*string_decl) (tree, const char *, string_section); |
| |
| /* Obtain a class reference, generating the fwd def. if necessary. */ |
| tree (*get_class_reference) (tree); |
| /* build/get selector reference. */ |
| tree (*build_selector_reference) (location_t, tree, tree); |
| /* Get a protocol reference, generating the forward def. if necessary. */ |
| tree (*get_protocol_reference) (location_t, tree); |
| /* Get an ivar ref. re the base. */ |
| tree (*build_ivar_reference) (location_t, tree, tree); |
| /* Get a reference to {meta}class' super. */ |
| tree (*get_class_super_ref) (location_t, struct imp_entry *, bool); |
| /* Get a reference to Category {meta}class' super. */ |
| tree (*get_category_super_ref) (location_t, struct imp_entry *, bool); |
| |
| /* Receiver is class Object, check runtime-specific. */ |
| tree (*receiver_is_class_object) (tree); |
| /* Get the start of a method argument type list (receiver, _cmd). */ |
| void (*get_arg_type_list_base) (vec<tree, va_gc> **, tree, int, int); |
| /* Build method call. */ |
| tree (*build_objc_method_call) (location_t, tree, tree, tree, tree, tree, int); |
| |
| /* Check for or otherwise handle a request to check that the constant |
| string class reference is set-up & OK. */ |
| bool (*setup_const_string_class_decl) (void); |
| /* Return the tree reprenting a const string constructor for the arg. |
| Most of the data are in global trees. */ |
| tree (*build_const_string_constructor) (location_t, tree, int); |
| |
| /* Exceptions. */ |
| tree (*build_throw_stmt) (location_t, tree, bool); |
| tree (*build_exc_ptr) (struct objc_try_context **); |
| tree (*begin_catch) (struct objc_try_context **, tree, tree, tree, bool); |
| void (*finish_catch) (struct objc_try_context **, tree); |
| tree (*finish_try_stmt) (struct objc_try_context **); |
| |
| /* Emit all the metadata required by the runtime - based on the tables built |
| during parsing. */ |
| void (*generate_metadata) (void); |
| |
| } objc_runtime_hooks; |
| |
| /* For shared support that needs to access these. */ |
| extern objc_runtime_hooks runtime; |
| |
| /* One per runtime at present. |
| TODO: Make into some kind of configury-generated table. */ |
| extern bool objc_gnu_runtime_abi_01_init (objc_runtime_hooks *); |
| extern bool objc_next_runtime_abi_01_init (objc_runtime_hooks *); |
| extern bool objc_next_runtime_abi_02_init (objc_runtime_hooks *); |
| |
| #endif /* _OBJC_RUNTIME_HOOKS_H_ */ |