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riscv-gcc-1
Commit e545f2b0 by Dennis Glatting
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Initial check in. Preliminary development stage. 

From-SVN: r45
parent 225411cf
Showing with 344 additions and 0 deletions
gcc/objc/objc.h 0 → 100644
/* -*-c-*-
* This file contains declarations used by the run-time system.
*
* Most of these declarations are defined by virtue of data
* structures produced by the compiler.
*
$Header$
$Author$
$Date$
$Log$
*/
#ifndef _objc_INCLUDE_GNU
#define _objc_INCLUDE_GNU
/* If someone is using a c++
compiler then adjust the
types in the file back
to C. */
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/types.h>
#include <hash.h>
#define nil ( id )0 /* id of Nil instance */
#define Nil ( Class_t )0 /* id of Nil class */
typedef char* STR; /* String alias */
/* Boolean typedefs */
typedef char BOOL;
#define YES (BOOL)1
#define NO (BOOL)0
/* Defination of a
selector. Selectors are
really of type char*. The
run-time uses strcmp() to
locate selectors. */
typedef STR SEL;
/* ObjC uses this typedef
for untyped instances. */
typedef struct objc_object {
struct objc_class* isa;
} *id;
/* Prototype for method
functions. */
typedef id ( *IMP )(
#ifdef __STDC__
id, SEL, ...
#endif
);
/* Filer types used to
describe Ivars and
Methods. */
#define _C_ID '@'
#define _C_CLASS '#'
#define _C_SEL ':'
#define _C_CHR 'c'
#define _C_UCHR 'C'
#define _C_SHT 's'
#define _C_USHT 'S'
#define _C_INT 'i'
#define _C_UINT 'I'
#define _C_LNG 'l'
#define _C_ULNG 'L'
#define _C_FLT 'f'
#define _C_DBL 'd'
#define _C_BFLD 'b'
#define _C_VOID 'v'
#define _C_UNDEF '?'
#define _C_PTR '^'
#define _C_CHARPTR '*'
#define _C_ARY_B '['
#define _C_ARY_E ']'
#define _C_UNION_B '('
#define _C_UNION_E ')'
#define _C_STRUCT_B '{'
#define _C_STRUCT_E '}'
/*
* These definitions are masks used with
* the "info" member variable in the class and
* meta class structures.
*/
#define CLS_CLASS 0x1L /* The structure is of type
class (Class_t). */
#define CLS_META 0x2L /* The structure is of type
meta class (MetaClass_t). */
#define CLS_INITIALIZED 0x4L /* Class is initialized. A
+initialize method is the
first message sent to a
class. It isn't guaranteed
to be sent only once. */
#define CLS_POSING 0x8L /* Class is posing as another.
Used to fix broken
classes. */
#define CLS_MAPPED 0x10L /* Unknown. */
/* Set this variable to !0 to
have the messager print
messaging operations. */
extern BOOL objc_trace;
/*
* Whereas a Module (defined further down) is the
* root (typically) of a file, a Symtab is the root of the
* class and category definitions within the module.
*
* A Symtab contains a variable length array of pointers
* to classes and categories defined in the module.
*/
typedef struct objc_symtab {
u_long sel_ref_cnt; /* Unknown. */
SEL *refs; /* Unknown. */
u_short cls_def_cnt; /* Number of classes compiled
(defined) in the module. */
u_short cat_def_cnt; /* Number of categories
compiled (defined) in the
module. */
void *defs[1]; /* Variable array of pointers.
cls_def_cnt of type Class_t
followed by cat_def_cnt of
type Category_t. */
} Symtab, *Symtab_t;
/*
* The compiler generates one of these structures for each
* module that composes the executable (eg main.m).
*
* This data structure is the root of the definition tree
* for the module.
*
* A collect program runs between ld stages and creates
* a ObjC ctor array. That array holds a pointer to each
* module structure of the executable.
*/
typedef struct objc_module {
u_long version; /* Unknown. */
u_long size; /* Suspect this is
sizeof(Module). It is always
16. */
char* name; /* Name of the file where the
module was generated. The
name includes the path. */
Symtab_t symtab; /* Pointer to the Symtab of
the module. The Symtab
holds an array of pointers to
the classes and categories
defined in the module. */
} Module, *Module_t;
/*
* The compiler generates one of these structures for a
* class that has instance variables defined in its
* specification.
*/
typedef struct objc_ivar* Ivar_t;
typedef struct objc_ivar_list {
int ivar_count; /* Number of structures (Ivar)
contained in the list. One
structure per instance
variable defined in the
class. */
struct objc_ivar {
char* ivar_name; /* Name of the instance
variable as entered in the
class definition. */
char* ivar_type; /* Description of the Ivar's
type. Useful for
debuggers. */
int ivar_offset; /* Byte offset from the base
address of the instance
structure to the variable. */
} ivar_list[1]; /* Variable length
structure. */
} IvarList, *IvarList_t;
/*
* The compiler generates one (or more) of these structures
* for a class that has methods defined in its specification.
*
* The implementation of a class can be broken into separate
* pieces in a file and categories can break them across modules.
* To handle this problem is a singly linked list of methods.
*/
typedef struct objc_method Method;
typedef Method* Method_t;
typedef struct objc_method_list {
struct objc_method_list* method_next; /* This variable is used to link
a method list to another. It
is a singly linked list. */
int method_count; /* Number of methods defined in
this structure. */
struct objc_method {
SEL method_name; /* This variable is the method's
name. It is a char*.
The unique integer passed to
objc_msgSend() is a char* too.
It is compared against
method_name using strcmp(). */
char* method_types; /* Description of the method's
parameter list. Useful for
debuggers. */
IMP method_imp; /* Address of the method in the
executable. */
} method_list[1]; /* Variable length
structure. */
} MethodList, *MethodList_t;
/*
* The compiler generates one of these structures for
* each class.
*
* This structure is the definition for meta classes.
* By definition a meta class is the class's class. Its
* most relevant contribution is that its method list
* contain the class's factory methods.
*
* This structure is generated by the compiler in the
* executable and used by the run-time during normal
* messaging operations. Therefore some definitions
* don't make sense in some contexts.
*/
typedef struct objc_metaClass {
char* isa; /* Always a pointer to the
string "Object". */
char* super_class; /* Name of the class's super
class. */
char* name; /* Name of the meta class. */
long version; /* Unknown. */
long info; /* Bit mask. See class masks
defined above. */
long instance_size; /* Always 0 except for Object.
Should be ignored. */
IvarList_t ivars; /* Always NULL except for
Object. Should be ignored. */
MethodList_t methods; /* Linked List of factory methods
for the class. */
Cache_t cache; /* Used to cache factory methods
defined for the class and its
super classes. Entries are
made to the cache as the
messager receives them. */
} MetaClass, *MetaClass_t;
/*
* The compiler generates one of these structures for
* each class.
*
* This structure is the definition for classes.
*
* This structure is generated by the compiler in the
* executable and used by the run-time during normal
* messaging operations. Therefore some definitions
* don't make sense in some contexts.
*/
typedef struct objc_class {
MetaClass_t isa; /* Pointer to the class's
meta class. */
char* super_class; /* Name of the class's super
class. */
char* name; /* Name of the class. */
long version; /* Unknown. */
long info; /* Bit mask. See class masks
defined above. */
long instance_size; /* Size in bytes of the class.
The sum of the class definition
and all super class
definitions. */
IvarList_t ivars; /* Pointer to a structure that
describes the instance
variables in the class
definition. NULL indicates
no instance variables. Does
not include super class
variables. */
MethodList_t methods; /* Linked list of instance
methods defined for the
class. */
Cache_t cache; /* Used to cache instance methods
defined for the class and its
super classes. Entries are
made to the cache as the
messager receives them. */
} Class, *Class_t;
/*
* The compiler generates one of these structures
* for each category. A class may have many
* categories and contain both instance and
* factory methods.
*/
typedef struct objc_category {
char* category_name; /* Name of the category. Name
contained in the () of the
category definition. */
char* class_name; /* Name of the class to which
the category belongs. */
MethodList_t instance_methods; /* Linked list of instance
methods defined in the
category. NULL indicates no
instance methods defined. */
MethodList_t class_methods; /* Linked list of factory
methods defined in the
category. NULL indicates no
class methods defined. */
} Category, *Category_t;
/*
* Structure used when a message is send to a class's
* super class. The compiler generates one of these
* structures and passes it to objc_msgSuper().
*/
typedef struct objc_super {
id receiver; /* Id of the object sending
the message. */
char* class; /* Name of the object's super
class. Passed to remove a
level of indirection? */
} Super, *Super_t;
#ifdef __cplusplus
}
#endif
#endif
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