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/* 
|| This file is part of Pike. For copyright information see COPYRIGHT. 
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING 
|| for more information. 
*/ 
 
#ifndef OBJECT_H 
#define OBJECT_H 
 
#include "global.h" 
#include "svalue.h" 
#include "gc_header.h" 
 
/* a destructed object has no program */ 
 
struct object 
{ 
  GC_MARKER_MEMBERS; 
  unsigned INT32 flags; 
  struct program *prog; 
  struct object *next; 
  struct object *prev; 
#ifdef PIKE_DEBUG 
  INT32 program_id; 
#endif 
  char *storage; 
}; 
 
/* Flags used in object->flags. */ 
#define OBJECT_CLEAR_ON_EXIT  1       /* Overwrite before free. */ 
 
PMOD_EXPORT extern struct object *first_object; 
extern struct object *gc_internal_object; 
PMOD_EXPORT extern struct object *objects_to_destruct; 
extern struct object *master_object; 
extern struct program *master_program; 
extern struct program *magic_index_program; 
extern struct program *magic_set_index_program; 
extern struct program *magic_indices_program; 
extern struct program *magic_values_program; 
extern struct program *magic_types_program; 
#ifdef DO_PIKE_CLEANUP 
PMOD_EXPORT extern int gc_external_refs_zapped; 
PMOD_EXPORT void gc_check_zapped (void *a, TYPE_T type, const char *file, INT_TYPE line); 
#endif 
 
#define free_object(O) do{                                            \ 
    struct object *o_=(O);                                              \ 
    debug_malloc_touch(o_);                                             \ 
    debug_malloc_touch(o_->storage);                                    \ 
    DO_IF_DEBUG (                                                       \ 
      DO_IF_PIKE_CLEANUP (                                              \ 
        if (gc_external_refs_zapped)                                    \ 
          gc_check_zapped (o_, PIKE_T_OBJECT, __FILE__, __LINE__)));    \ 
    if(!sub_ref(o_))                                                    \ 
      schedule_really_free_object(o_);                                  \ 
  }while(0) 
 
#ifdef DEBUG_MALLOC 
#define PIKE_OBJ_STORAGE(O) ((char *)debug_malloc_pass( (O)->storage )) 
#else 
#define PIKE_OBJ_STORAGE(O) ((O)->storage) 
#endif 
 
#define LOW_GET_GLOBAL(O,I,ID) (PIKE_OBJ_STORAGE((O))+INHERIT_FROM_INT((O)->prog, (I))->storage_offset+(ID)->func.offset) 
#define GET_GLOBAL(O,I) LOW_GET_GLOBAL(O,I,ID_FROM_INT((O)->prog,I)) 
 
#define this_object() (add_ref(Pike_fp->current_object), Pike_fp->current_object) 
 
enum object_destruct_reason { 
  DESTRUCT_EXPLICIT = 0, 
  DESTRUCT_CLEANUP = 1, 
  DESTRUCT_NO_REFS, 
  DESTRUCT_GC 
}; 
 
#include "block_alloc_h.h" 
 
ATTRIBUTE((malloc)) struct object * alloc_object(); 
void really_free_object(struct object * o); 
void count_memory_in_objects(size_t *_num, size_t *_size); 
void free_all_object_blocks(void); 
PMOD_EXPORT struct object *low_clone(struct program *p); 
PMOD_EXPORT void call_c_initializers(struct object *o); 
PMOD_EXPORT void call_prog_event(struct object *o, int event); 
void call_pike_initializers(struct object *o, int args); 
PMOD_EXPORT void do_free_object(struct object *o); 
PMOD_EXPORT struct object *debug_clone_object(struct program *p, int args); 
PMOD_EXPORT struct object *fast_clone_object(struct program *p); 
PMOD_EXPORT struct object *parent_clone_object(struct program *p, 
                                               struct object *parent, 
                                               ptrdiff_t parent_identifier, 
                                               int args); 
PMOD_EXPORT struct object *clone_object_from_object(struct object *o, int args); 
struct object *decode_value_clone_object(struct svalue *prog); 
struct pike_string *low_read_file(const char *file); 
PMOD_EXPORT struct object *get_master(void); 
PMOD_EXPORT struct object *debug_master(void); 
struct destruct_called_mark; 
PTR_HASH_ALLOC(destruct_called_mark,128); 
PMOD_EXPORT struct program *get_program_for_object_being_destructed(struct object * o); 
PMOD_EXPORT void destruct_object (struct object *o, enum object_destruct_reason reason); 
#define destruct(o) destruct_object (o, DESTRUCT_EXPLICIT) 
PMOD_EXPORT void low_destruct_objects_to_destruct(void); 
void destruct_objects_to_destruct_cb(void); 
PMOD_EXPORT void schedule_really_free_object(struct object *o); 
PMOD_EXPORT int low_object_index_no_free(struct svalue *to, 
                                         struct object *o, 
                                         ptrdiff_t f); 
PMOD_EXPORT int object_index_no_free2(struct svalue *to, 
                                      struct object *o, 
                                      int inherit_level, 
                                      struct svalue *key); 
PMOD_EXPORT int object_index_no_free(struct svalue *to, 
                                     struct object *o, 
                                     int inherit_level, 
                                     struct svalue *key); 
PMOD_EXPORT void object_low_set_index(struct object *o, 
                                      int f, 
                                      struct svalue *from); 
PMOD_EXPORT void object_set_index2(struct object *o, 
                                   int inherit_level, 
                                   struct svalue *key, 
                                   struct svalue *from); 
PMOD_EXPORT void object_set_index(struct object *o, 
                                  int inherit_level, 
                                  struct svalue *key, 
                                  struct svalue *from); 
union anything *object_get_item_ptr(struct object *o, 
                                    int inherit_level, 
                                    struct svalue *key, 
                                    TYPE_T type); 
PMOD_EXPORT int object_equal_p(struct object *a, struct object *b, struct processing *p); 
PMOD_EXPORT struct array *object_indices(struct object *o, int inherit_level); 
PMOD_EXPORT struct array *object_values(struct object *o, int inherit_level); 
PMOD_EXPORT struct array *object_types(struct object *o, int inherit_level); 
PMOD_EXPORT void visit_object (struct object *o, int action, void *extra); 
PMOD_EXPORT void visit_function (const struct svalue *s, int ref_type, 
                                 void *extra); 
PMOD_EXPORT void gc_mark_object_as_referenced(struct object *o); 
PMOD_EXPORT void real_gc_cycle_check_object(struct object *o, int weak); 
 
enum memobj_type{ 
    MEMOBJ_NONE, 
    MEMOBJ_SYSTEM_MEMORY, 
    MEMOBJ_STRING_BUFFER, 
    MEMOBJ_STDIO_IOBUFFER, 
}; 
 
struct pike_memory_object { 
  void *ptr; 
  size_t len; 
  int shift; 
}; 
 
PMOD_EXPORT enum memobj_type get_memory_object_memory( struct object *o, void **ptr, size_t *len, int *shift ); 
PMOD_EXPORT enum memobj_type pike_get_memory_object( struct object *o, struct pike_memory_object *m, 
                                                     int writeable ); 
PMOD_EXPORT int pike_advance_memory_object( struct object *o, 
                                            enum memobj_type type, 
                                            size_t length ); 
 
 
unsigned gc_touch_all_objects(void); 
void gc_check_all_objects(void); 
void gc_mark_all_objects(void); 
void gc_cycle_check_all_objects(void); 
void gc_zap_ext_weak_refs_in_objects(void); 
size_t gc_free_all_unreferenced_objects(void); 
struct magic_index_struct; 
void push_magic_index(struct program *type, int inherit_no, int parent_level); 
void low_init_object(void); 
void init_object(void); 
void exit_object(void); 
void late_exit_object(void); 
void check_object_context(struct object *o, 
                          struct program *context_prog, 
                          char *current_storage); 
void check_object(struct object *o); 
void check_all_objects(void); 
/* Prototypes end here */ 
 
#ifdef DEBUG_MALLOC 
#define clone_object(X,Y) ((struct object *)debug_malloc_pass(debug_clone_object((X),(Y)))) 
#else 
#define clone_object debug_clone_object 
#endif 
 
#ifdef PIKE_DEBUG 
#define master() ( get_master() ? get_master() : ( Pike_fatal("Couldn't load master object at %s:%d.\n",__FILE__,__LINE__), (struct object *)NULL) ) 
#else 
#define master() debug_master() 
#endif 
 
#define visit_object_ref(O, REF_TYPE, EXTRA)                  \ 
  visit_ref (pass_object (O), (REF_TYPE),                       \ 
             (visit_thing_fn *) &visit_object, (EXTRA)) 
#define gc_cycle_check_object(X, WEAK) \ 
  gc_cycle_enqueue((gc_cycle_check_cb *) real_gc_cycle_check_object, (X), (WEAK)) 
 
#define PIKE_OBJ_DESTRUCTED(o) (!(o)->prog) 
#define PIKE_OBJ_INITED(o) (o->prog && (o->prog->flags & PROGRAM_PASS_1_DONE) && !((o->prog->flags & PROGRAM_AVOID_CHECK))) 
#define destruct_objects_to_destruct() do{ if(objects_to_destruct) low_destruct_objects_to_destruct(); }while(0) 
 
#define low_index_current_object_no_free(TO, FUN)                     \ 
  low_object_index_no_free((TO), Pike_fp->current_object,               \ 
                           Pike_fp->context->identifier_level + (FUN)) 
 
#define tF_MAGIC_INDEX tFunc(tStr tOr3(tVoid,tObj,tDeprecated(tInt)) \ 
                             tOr(tVoid,tInt), tMix) 
#define tF_MAGIC_SET_INDEX tFunc(tStr tMix tOr3(tVoid,tObj,tDeprecated(tInt)) \ 
                                 tOr(tVoid,tInt), tVoid) 
#define tF_MAGIC_INDICES tFunc(tOr3(tVoid,tObj,tDeprecated(tInt)) \ 
                               tOr(tVoid,tInt), tArr(tStr)) 
#define tF_MAGIC_VALUES tFunc(tOr3(tVoid,tObj,tDeprecated(tInt)) \ 
                              tOr(tVoid,tInt), tArray) 
#define tF_MAGIC_TYPES tFunc(tOr3(tVoid,tObj,tDeprecated(tInt)) \ 
                             tOr(tVoid,tInt), tArr(tType(tMix))) 
 
#endif /* OBJECT_H */