/*

   +----------------------------------------------------------------------+

   | Copyright (c) The PHP Group                                          |

   +----------------------------------------------------------------------+

   | This source file is subject to version 2.00 of the Zend license,     |

   | that is bundled with this package in the file LICENSE, and is        |

   | available through the world-wide-web at the following url:           |

   | http://www.zend.com/license/2_00.txt.                                |

   | If you did not receive a copy of the Zend license and are unable to  |

   | obtain it through the world-wide-web, please send a note to          |

   | license@zend.com so we can mail you a copy immediately.              |

   +----------------------------------------------------------------------+

   | Authors: krakjoe@php.net                                             |

   +----------------------------------------------------------------------+

*/

#include "zend.h"

#include "zend_interfaces.h"

#include "zend_objects_API.h"

#include "zend_weakrefs.h"

#include "zend_weakrefs_arginfo.h"

typedef struct _zend_weakref {

  zend_object *referent;

  zend_object std;

} zend_weakref;

typedef struct _zend_weakmap {

  HashTable ht;

  zend_object std;

} zend_weakmap;

typedef struct _zend_weakmap_iterator {

  zend_object_iterator it;

  uint32_t ht_iter;

} zend_weakmap_iterator;

/* The EG(weakrefs) ht is a map from object address a tagged pointer, that may be one of

 * zend_weakref*, zend_weakmap* or HashTable*. */

#define ZEND_WEAKREF_TAG_REF 0

#define ZEND_WEAKREF_TAG_MAP 1

#define ZEND_WEAKREF_TAG_HT  2

#define ZEND_WEAKREF_GET_TAG(p) (((uintptr_t) (p)) & 3)

#define ZEND_WEAKREF_GET_PTR(p) ((void *) (((uintptr_t) (p)) & ~3))

#define ZEND_WEAKREF_ENCODE(p, t) ((void *) (((uintptr_t) (p)) | (t)))

zend_class_entry *zend_ce_weakref;

zend_class_entry *zend_ce_weakmap;

static zend_object_handlers zend_weakref_handlers;

static zend_object_handlers zend_weakmap_handlers;

#define zend_weakref_from(o) ((zend_weakref*)(((char*) o) - XtOffsetOf(zend_weakref, std)))

#define zend_weakref_fetch(z) zend_weakref_from(Z_OBJ_P(z))

#define zend_weakmap_from(o) ((zend_weakmap*)(((char*) o) - XtOffsetOf(zend_weakmap, std)))

#define zend_weakmap_fetch(z) zend_weakmap_from(Z_OBJ_P(z))

static inline void zend_weakref_unref_single(

    void *ptr, uintptr_t tag, zend_ulong obj_addr)

{

  if (tag == ZEND_WEAKREF_TAG_REF) {

    zend_weakref *wr = ptr;

    wr->referent = NULL;

  } else {

    ZEND_ASSERT(tag == ZEND_WEAKREF_TAG_MAP);

    zend_weakmap *wm = ptr;

    zend_hash_index_del(&wm->ht, obj_addr);

  }

}

static void zend_weakref_unref(zend_ulong obj_addr, void *tagged_ptr) {

  void *ptr = ZEND_WEAKREF_GET_PTR(tagged_ptr);

  uintptr_t tag = ZEND_WEAKREF_GET_TAG(tagged_ptr);

  if (tag == ZEND_WEAKREF_TAG_HT) {

    HashTable *ht = ptr;

    ZEND_HASH_FOREACH_PTR(ht, tagged_ptr) {

      zend_weakref_unref_single(

        ZEND_WEAKREF_GET_PTR(tagged_ptr), ZEND_WEAKREF_GET_TAG(tagged_ptr), obj_addr);

    } ZEND_HASH_FOREACH_END();

    zend_hash_destroy(ht);

    FREE_HASHTABLE(ht);

  } else {

    zend_weakref_unref_single(ptr, tag, obj_addr);

  }

}

static void zend_weakref_register(zend_object *object, void *payload) {

  GC_ADD_FLAGS(object, IS_OBJ_WEAKLY_REFERENCED);

  zend_ulong obj_addr = (zend_ulong) object;

  zval *zv = zend_hash_index_find(&EG(weakrefs), obj_addr);

  if (!zv) {

    zend_hash_index_add_new_ptr(&EG(weakrefs), obj_addr, payload);

    return;

  }

  void *tagged_ptr = Z_PTR_P(zv);

  if (ZEND_WEAKREF_GET_TAG(tagged_ptr) == ZEND_WEAKREF_TAG_HT) {

    HashTable *ht = ZEND_WEAKREF_GET_PTR(tagged_ptr);

    zend_hash_index_add_new_ptr(ht, (zend_ulong) payload, payload);

    return;

  }

  /* Convert simple pointer to hashtable. */

  HashTable *ht = emalloc(sizeof(HashTable));

  zend_hash_init(ht, 0, NULL, NULL, 0);

  zend_hash_index_add_new_ptr(ht, (zend_ulong) tagged_ptr, tagged_ptr);

  zend_hash_index_add_new_ptr(ht, (zend_ulong) payload, payload);

  zend_hash_index_update_ptr(

    &EG(weakrefs), obj_addr, ZEND_WEAKREF_ENCODE(ht, ZEND_WEAKREF_TAG_HT));

}

static void zend_weakref_unregister(zend_object *object, void *payload) {

  zend_ulong obj_addr = (zend_ulong) object;

  void *tagged_ptr = zend_hash_index_find_ptr(&EG(weakrefs), obj_addr);

  ZEND_ASSERT(tagged_ptr && "Weakref not registered?");

  void *ptr = ZEND_WEAKREF_GET_PTR(tagged_ptr);

  uintptr_t tag = ZEND_WEAKREF_GET_TAG(tagged_ptr);

  if (tag != ZEND_WEAKREF_TAG_HT) {

    ZEND_ASSERT(tagged_ptr == payload);

    zend_weakref_unref_single(ptr, tag, obj_addr);

    zend_hash_index_del(&EG(weakrefs), obj_addr);

    GC_DEL_FLAGS(object, IS_OBJ_WEAKLY_REFERENCED);

    return;

  }

  HashTable *ht = ptr;

  tagged_ptr = zend_hash_index_find_ptr(ht, (zend_ulong) payload);

  ZEND_ASSERT(tagged_ptr && "Weakref not registered?");

  ZEND_ASSERT(tagged_ptr == payload);

  zend_weakref_unref_single(

    ZEND_WEAKREF_GET_PTR(payload), ZEND_WEAKREF_GET_TAG(payload), obj_addr);

  zend_hash_index_del(ht, (zend_ulong) payload);

  if (zend_hash_num_elements(ht) == 0) {

    GC_DEL_FLAGS(object, IS_OBJ_WEAKLY_REFERENCED);

    zend_hash_destroy(ht);

    FREE_HASHTABLE(ht);

    zend_hash_index_del(&EG(weakrefs), obj_addr);

  }

}

void zend_weakrefs_init() {

  zend_hash_init(&EG(weakrefs), 8, NULL, NULL, 0);

}

void zend_weakrefs_notify(zend_object *object) {

  /* Annoyingly we can't use the HT destructor here, because we need access to the key (which

   * is the object address), which is not provided to the dtor. */

  zend_ulong obj_addr = (zend_ulong) object;

  void *tagged_ptr = zend_hash_index_find_ptr(&EG(weakrefs), obj_addr);

#if ZEND_DEBUG

  ZEND_ASSERT(tagged_ptr && "Tracking of the IS_OBJ_WEAKLY_REFERENCE flag should be precise");

#endif

  if (tagged_ptr) {

    zend_weakref_unref(obj_addr, tagged_ptr);

    zend_hash_index_del(&EG(weakrefs), obj_addr);

  }

}

void zend_weakrefs_shutdown() {

  zend_ulong obj_addr;

  void *tagged_ptr;

  ZEND_HASH_FOREACH_NUM_KEY_PTR(&EG(weakrefs), obj_addr, tagged_ptr) {

    zend_weakref_unref(obj_addr, tagged_ptr);

  } ZEND_HASH_FOREACH_END();

  zend_hash_destroy(&EG(weakrefs));

}

static zend_object* zend_weakref_new(zend_class_entry *ce) {

  zend_weakref *wr = zend_object_alloc(sizeof(zend_weakref), zend_ce_weakref);

  zend_object_std_init(&wr->std, zend_ce_weakref);

  wr->std.handlers = &zend_weakref_handlers;

  return &wr->std;

}

static zend_always_inline zend_bool zend_weakref_find(zval *referent, zval *return_value) {

  void *tagged_ptr = zend_hash_index_find_ptr(&EG(weakrefs), (zend_ulong) Z_OBJ_P(referent));

  if (!tagged_ptr) {

    return 0;

  }

  void *ptr = ZEND_WEAKREF_GET_PTR(tagged_ptr);

  uintptr_t tag = ZEND_WEAKREF_GET_TAG(tagged_ptr);

  if (tag == ZEND_WEAKREF_TAG_REF) {

    zend_weakref *wr;

found_weakref:

    wr = ptr;

    RETVAL_OBJ_COPY(&wr->std);

    return 1;

  }

  if (tag == ZEND_WEAKREF_TAG_HT) {

    ZEND_HASH_FOREACH(ptr, tagged_ptr) {

      if (ZEND_WEAKREF_GET_TAG(tagged_ptr) == ZEND_WEAKREF_TAG_REF) {

        ptr = ZEND_WEAKREF_GET_PTR(tagged_ptr);

        goto found_weakref;

      }

    } ZEND_HASH_FOREACH_END();

  }

  return 0;

}

static zend_always_inline void zend_weakref_create(zval *referent, zval *return_value) {

  zend_weakref *wr;

  object_init_ex(return_value, zend_ce_weakref);

  wr = zend_weakref_fetch(return_value);

  wr->referent = Z_OBJ_P(referent);

  zend_weakref_register(wr->referent, ZEND_WEAKREF_ENCODE(wr, ZEND_WEAKREF_TAG_REF));

}

static zend_always_inline void zend_weakref_get(zval *weakref, zval *return_value) {

  zend_weakref *wr = zend_weakref_fetch(weakref);

  if (wr->referent) {

    RETVAL_OBJ_COPY(wr->referent);

  }

}

static void zend_weakref_free(zend_object *zo) {

  zend_weakref *wr = zend_weakref_from(zo);

  if (wr->referent) {

    zend_weakref_unregister(wr->referent, ZEND_WEAKREF_ENCODE(wr, ZEND_WEAKREF_TAG_REF));

  }

  zend_object_std_dtor(&wr->std);

}

ZEND_COLD ZEND_METHOD(WeakReference, __construct)

{

  zend_throw_error(NULL,

      "Direct instantiation of 'WeakReference' is not allowed, "

      "use WeakReference::create instead");

}

ZEND_METHOD(WeakReference, create)

{

  zval *referent;

  ZEND_PARSE_PARAMETERS_START(1,1)

    Z_PARAM_OBJECT(referent)

  ZEND_PARSE_PARAMETERS_END();

  if (zend_weakref_find(referent, return_value)) {

      return;

  }

  zend_weakref_create(referent, return_value);

}

ZEND_METHOD(WeakReference, get)

{

  ZEND_PARSE_PARAMETERS_NONE();

  zend_weakref_get(getThis(), return_value);

}

static zend_object *zend_weakmap_create_object(zend_class_entry *ce)

{

  zend_weakmap *wm = zend_object_alloc(sizeof(zend_weakmap), ce);

  zend_object_std_init(&wm->std, ce);

  wm->std.handlers = &zend_weakmap_handlers;

  zend_hash_init(&wm->ht, 0, NULL, ZVAL_PTR_DTOR, 0);

  return &wm->std;

}

static void zend_weakmap_free_obj(zend_object *object)

{

  zend_weakmap *wm = zend_weakmap_from(object);

  zend_ulong obj_addr;

  ZEND_HASH_FOREACH_NUM_KEY(&wm->ht, obj_addr) {

    zend_weakref_unregister(

      (zend_object *) obj_addr, ZEND_WEAKREF_ENCODE(wm, ZEND_WEAKREF_TAG_MAP));

  } ZEND_HASH_FOREACH_END();

  zend_hash_destroy(&wm->ht);

  zend_object_std_dtor(&wm->std);

}

static zval *zend_weakmap_read_dimension(zend_object *object, zval *offset, int type, zval *rv)

{

  if (offset == NULL) {

    zend_throw_error(NULL, "Cannot append to WeakMap");

    return NULL;

  }

  if (Z_TYPE_P(offset) != IS_OBJECT) {

    zend_type_error("WeakMap key must be an object");

    return NULL;

  }

  zend_weakmap *wm = zend_weakmap_from(object);

  zend_object *obj_key = Z_OBJ_P(offset);

  zval *zv = zend_hash_index_find(&wm->ht, (zend_ulong) obj_key);

  if (zv == NULL) {

    if (type != BP_VAR_IS) {

      zend_throw_error(NULL,

        "Object %s#%d not contained in WeakMap", ZSTR_VAL(obj_key->ce->name), obj_key->handle);

      return NULL;

    }

    return NULL;

  }

  if (type == BP_VAR_W || type == BP_VAR_RW) {

    ZVAL_MAKE_REF(zv);

  }

  return zv;

}

static void zend_weakmap_write_dimension(zend_object *object, zval *offset, zval *value)

{

  if (offset == NULL) {

    zend_throw_error(NULL, "Cannot append to WeakMap");

    return;

  }

  if (Z_TYPE_P(offset) != IS_OBJECT) {

    zend_type_error("WeakMap key must be an object");

    return;

  }

  zend_weakmap *wm = zend_weakmap_from(object);

  zend_object *obj_key = Z_OBJ_P(offset);

  Z_TRY_ADDREF_P(value);

  zval *zv = zend_hash_index_find(&wm->ht, (zend_ulong) obj_key);

  if (zv) {

    zval_ptr_dtor(zv);

    ZVAL_COPY_VALUE(zv, value);

    return;

  }

  zend_weakref_register(obj_key, ZEND_WEAKREF_ENCODE(wm, ZEND_WEAKREF_TAG_MAP));

  zend_hash_index_add_new(&wm->ht, (zend_ulong) obj_key, value);

}

static int zend_weakmap_has_dimension(zend_object *object, zval *offset, int check_empty)

{

  if (Z_TYPE_P(offset) != IS_OBJECT) {

    zend_type_error("WeakMap key must be an object");

    return 0;

  }

  zend_weakmap *wm = zend_weakmap_from(object);

  zval *zv = zend_hash_index_find(&wm->ht, (zend_ulong) Z_OBJ_P(offset));

  if (!zv) {

    return 0;

  }

  if (check_empty) {

    return i_zend_is_true(zv);

  }

  return Z_TYPE_P(zv) != IS_NULL;

}

static void zend_weakmap_unset_dimension(zend_object *object, zval *offset)

{

  if (Z_TYPE_P(offset) != IS_OBJECT) {

    zend_type_error("WeakMap key must be an object");

    return;

  }

  zend_weakmap *wm = zend_weakmap_from(object);

  zend_object *obj_key = Z_OBJ_P(offset);

  zend_weakref_unregister(obj_key, ZEND_WEAKREF_ENCODE(wm, ZEND_WEAKREF_TAG_MAP));

}

static int zend_weakmap_count_elements(zend_object *object, zend_long *count)

{

  zend_weakmap *wm = zend_weakmap_from(object);

  *count = zend_hash_num_elements(&wm->ht);

  return SUCCESS;

}

static HashTable *zend_weakmap_get_properties_for(zend_object *object, zend_prop_purpose purpose)

{

  if (purpose != ZEND_PROP_PURPOSE_DEBUG) {

    return NULL;

  }

  zend_weakmap *wm = zend_weakmap_from(object);

  HashTable *ht;

  ALLOC_HASHTABLE(ht);

  zend_hash_init(ht, zend_hash_num_elements(&wm->ht), NULL, ZVAL_PTR_DTOR, 0);

  zend_ulong obj_addr;

  zval *val;

  ZEND_HASH_FOREACH_NUM_KEY_VAL(&wm->ht, obj_addr, val) {

    zval pair;

    zval obj_zv;

    array_init(&pair);

    ZVAL_OBJ_COPY(&obj_zv, (zend_object *) obj_addr);

    add_assoc_zval(&pair, "key", &obj_zv);

    Z_TRY_ADDREF_P(val);

    add_assoc_zval(&pair, "value", val);

    zend_hash_next_index_insert(ht, &pair);

  } ZEND_HASH_FOREACH_END();

  return ht;

}

static HashTable *zend_weakmap_get_gc(zend_object *object, zval **table, int *n)

{

  zend_weakmap *wm = zend_weakmap_from(object);

  *table = NULL;

  *n = 0;

  return &wm->ht;

}

static zend_object *zend_weakmap_clone_obj(zend_object *old_object)

{

  zend_object *new_object = zend_weakmap_create_object(zend_ce_weakmap);

  zend_weakmap *old_wm = zend_weakmap_from(old_object);

  zend_weakmap *new_wm = zend_weakmap_from(new_object);

  zend_hash_copy(&new_wm->ht, &old_wm->ht, NULL);

  zend_ulong obj_addr;

  zval *val;

  ZEND_HASH_FOREACH_NUM_KEY_VAL(&new_wm->ht, obj_addr, val) {

    zend_weakref_register(

      (zend_object *) obj_addr, ZEND_WEAKREF_ENCODE(new_wm, ZEND_WEAKREF_TAG_MAP));

    zval_add_ref(val);

  } ZEND_HASH_FOREACH_END();

  return new_object;

}

static HashPosition *zend_weakmap_iterator_get_pos_ptr(zend_weakmap_iterator *iter) {

  ZEND_ASSERT(iter->ht_iter != (uint32_t) -1);

  return &EG(ht_iterators)[iter->ht_iter].pos;

}

static void zend_weakmap_iterator_dtor(zend_object_iterator *obj_iter)

{

  zend_weakmap_iterator *iter = (zend_weakmap_iterator *) obj_iter;

  zend_hash_iterator_del(iter->ht_iter);

  zval_ptr_dtor(&iter->it.data);

}

static int zend_weakmap_iterator_valid(zend_object_iterator *obj_iter)

{

  zend_weakmap_iterator *iter = (zend_weakmap_iterator *) obj_iter;

  zend_weakmap *wm = zend_weakmap_fetch(&iter->it.data);

  HashPosition *pos = zend_weakmap_iterator_get_pos_ptr(iter);

  return zend_hash_has_more_elements_ex(&wm->ht, pos);

}

static zval *zend_weakmap_iterator_get_current_data(zend_object_iterator *obj_iter)

{

  zend_weakmap_iterator *iter = (zend_weakmap_iterator *) obj_iter;

  zend_weakmap *wm = zend_weakmap_fetch(&iter->it.data);

  HashPosition *pos = zend_weakmap_iterator_get_pos_ptr(iter);

  return zend_hash_get_current_data_ex(&wm->ht, pos);

}

static void zend_weakmap_iterator_get_current_key(zend_object_iterator *obj_iter, zval *key)

{

  zend_weakmap_iterator *iter = (zend_weakmap_iterator *) obj_iter;

  zend_weakmap *wm = zend_weakmap_fetch(&iter->it.data);

  HashPosition *pos = zend_weakmap_iterator_get_pos_ptr(iter);

  zend_string *string_key;

  zend_ulong num_key;

  int key_type = zend_hash_get_current_key_ex(&wm->ht, &string_key, &num_key, pos);

  if (key_type != HASH_KEY_IS_LONG) {

    ZEND_ASSERT(0 && "Must have integer key");

  }

  ZVAL_OBJ_COPY(key, (zend_object *) num_key);

}

static void zend_weakmap_iterator_move_forward(zend_object_iterator *obj_iter)

{

  zend_weakmap_iterator *iter = (zend_weakmap_iterator *) obj_iter;

  zend_weakmap *wm = zend_weakmap_fetch(&iter->it.data);

  HashPosition *pos = zend_weakmap_iterator_get_pos_ptr(iter);

  zend_hash_move_forward_ex(&wm->ht, pos);

}

static void zend_weakmap_iterator_rewind(zend_object_iterator *obj_iter)

{

  zend_weakmap_iterator *iter = (zend_weakmap_iterator *) obj_iter;

  zend_weakmap *wm = zend_weakmap_fetch(&iter->it.data);

  HashPosition *pos = zend_weakmap_iterator_get_pos_ptr(iter);

  zend_hash_internal_pointer_reset_ex(&wm->ht, pos);

}

static const zend_object_iterator_funcs zend_weakmap_iterator_funcs = {

  zend_weakmap_iterator_dtor,

  zend_weakmap_iterator_valid,

  zend_weakmap_iterator_get_current_data,

  zend_weakmap_iterator_get_current_key,

  zend_weakmap_iterator_move_forward,

  zend_weakmap_iterator_rewind,

  NULL

};

static zend_object_iterator *zend_weakmap_get_iterator(

    zend_class_entry *ce, zval *object, int by_ref)

{

  zend_weakmap *wm = zend_weakmap_fetch(object);

  zend_weakmap_iterator *iter = emalloc(sizeof(zend_weakmap_iterator));

  zend_iterator_init(&iter->it);

  iter->it.funcs = &zend_weakmap_iterator_funcs;

  ZVAL_COPY(&iter->it.data, object);

  iter->ht_iter = zend_hash_iterator_add(&wm->ht, 0);

  return &iter->it;

}

ZEND_METHOD(WeakMap, offsetGet)

{

  zval *key;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &key) == FAILURE) {

    return;

  }

  zval *zv = zend_weakmap_read_dimension(Z_OBJ_P(ZEND_THIS), key, BP_VAR_R, NULL);

  if (!zv) {

    return;

  }

  ZVAL_COPY(return_value, zv);

}

ZEND_METHOD(WeakMap, offsetSet)

{

  zval *key, *value;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "zz", &key, &value) == FAILURE) {

    return;

  }

  zend_weakmap_write_dimension(Z_OBJ_P(ZEND_THIS), key, value);

}

ZEND_METHOD(WeakMap, offsetExists)

{

  zval *key;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &key) == FAILURE) {

    return;

  }

  RETURN_BOOL(zend_weakmap_has_dimension(Z_OBJ_P(ZEND_THIS), key, /* check_empty */ 0));

}

ZEND_METHOD(WeakMap, offsetUnset)

{

  zval *key;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &key) == FAILURE) {

    return;

  }

  zend_weakmap_unset_dimension(Z_OBJ_P(ZEND_THIS), key);

}

ZEND_METHOD(WeakMap, count)

{

  if (zend_parse_parameters_none() == FAILURE) {

    return;

  }

  zend_long count;

  zend_weakmap_count_elements(Z_OBJ_P(ZEND_THIS), &count);

  RETURN_LONG(count);

}

ZEND_METHOD(WeakMap, getIterator)

{

  if (zend_parse_parameters_none() == FAILURE) {

    return;

  }

  zend_create_internal_iterator_zval(return_value, ZEND_THIS);

}

void zend_register_weakref_ce(void) /* {{{ */

{

  zend_class_entry ce;

  INIT_CLASS_ENTRY(ce, "WeakReference", class_WeakReference_methods);

  zend_ce_weakref = zend_register_internal_class(&ce);

  zend_ce_weakref->ce_flags |= ZEND_ACC_FINAL | ZEND_ACC_NO_DYNAMIC_PROPERTIES;

  zend_ce_weakref->create_object = zend_weakref_new;

  zend_ce_weakref->serialize = zend_class_serialize_deny;

  zend_ce_weakref->unserialize = zend_class_unserialize_deny;

  memcpy(&zend_weakref_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));

  zend_weakref_handlers.offset = XtOffsetOf(zend_weakref, std);

  zend_weakref_handlers.free_obj = zend_weakref_free;

  zend_weakref_handlers.clone_obj = NULL;

  INIT_CLASS_ENTRY(ce, "WeakMap", class_WeakMap_methods);

  zend_ce_weakmap = zend_register_internal_class(&ce);

  zend_ce_weakmap->ce_flags |= ZEND_ACC_FINAL | ZEND_ACC_NO_DYNAMIC_PROPERTIES;

  zend_class_implements(

    zend_ce_weakmap, 3, zend_ce_arrayaccess, zend_ce_countable, zend_ce_aggregate);

  zend_ce_weakmap->create_object = zend_weakmap_create_object;

  zend_ce_weakmap->get_iterator = zend_weakmap_get_iterator;

  zend_ce_weakmap->serialize = zend_class_serialize_deny;

  zend_ce_weakmap->unserialize = zend_class_unserialize_deny;

  memcpy(&zend_weakmap_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));

  zend_weakmap_handlers.offset = XtOffsetOf(zend_weakmap, std);

  zend_weakmap_handlers.free_obj = zend_weakmap_free_obj;

  zend_weakmap_handlers.read_dimension = zend_weakmap_read_dimension;

  zend_weakmap_handlers.write_dimension = zend_weakmap_write_dimension;

  zend_weakmap_handlers.has_dimension = zend_weakmap_has_dimension;

  zend_weakmap_handlers.unset_dimension = zend_weakmap_unset_dimension;

  zend_weakmap_handlers.count_elements = zend_weakmap_count_elements;

  zend_weakmap_handlers.get_properties_for = zend_weakmap_get_properties_for;

  zend_weakmap_handlers.get_gc = zend_weakmap_get_gc;

  zend_weakmap_handlers.clone_obj = zend_weakmap_clone_obj;

}

/* }}} */