hphp/runtime/ext_zend_compat/hhvm/zend-object-store.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-2014 Facebook, Inc. (http://www.facebook.com)     |
   6    | Copyright (c) 1997-2010 The PHP Group                                |
   7    +----------------------------------------------------------------------+
   8    | This source file is subject to version 3.01 of the PHP license,      |
   9    | that is bundled with this package in the file LICENSE, and is        |
  10    | available through the world-wide-web at the following url:           |
  11    | http://www.php.net/license/3_01.txt                                  |
  12    | If you did not receive a copy of the PHP license and are unable to   |
  13    | obtain it through the world-wide-web, please send a note to          |
  14    | license@php.net so we can mail you a copy immediately.               |
  15    +----------------------------------------------------------------------+
  16 */
  17
  18 #include "hphp/runtime/ext_zend_compat/hhvm/zend-object-store.h"
  19 #include "hphp/runtime/vm/jit/translator-inline.h"
  20
  21 namespace HPHP {
  22
  23 __thread RequestLocal<ZendObjectStore> ZendObjectStore::tl_instance;
  24
  25 void ZendObjectStore::requestShutdown() {
  26   m_store.clear();
  27   m_free_list_head = 0;
  28 }
  29
  30 zend_object_handle ZendObjectStore::insertObject(void *object,
  31     zend_objects_store_dtor_t dtor,
  32     zend_objects_free_object_storage_t free_storage,
  33     zend_objects_store_clone_t clone)
  34 {
  35   zend_object_handle index;
  36   if (m_free_list_head) {
  37     index = m_free_list_head;
  38     m_free_list_head = m_store.at(index).bucket.free_list.next;
  39   } else {
  40     index = m_store.size();
  41     // Don't use handle zero
  42     if (index == 0) {
  43       index++;
  44     }
  45     m_store.resize(index + 1);
  46   }
  47
  48   zend_object_store_bucket & bucket = m_store.at(index);
  49   bucket.destructor_called = 0;
  50   bucket.valid = 1;
  51   bucket.apply_count = 0;
  52
  53   auto & obj = bucket.bucket.obj;
  54   obj.refcount = 1; // unused
  55   obj.object = object;
  56   obj.dtor = dtor; // unused
  57   obj.free_storage = free_storage;
  58   obj.clone = clone;
  59   obj.handlers = nullptr; // unused
  60   return index;
  61
  62 }
  63
  64 void * ZendObjectStore::getObject(zend_object_handle handle) {
  65   return m_store.at(handle).bucket.obj.object;
  66 }
  67
  68 void ZendObjectStore::freeObject(zend_object_handle handle) {
  69   zend_object_store_bucket & bucket = m_store.at(handle);
  70   assert(bucket.valid);
  71   auto & obj = bucket.bucket.obj;
  72
  73   if (obj.free_storage) {
  74     TSRMLS_FETCH();
  75     HPHP::VMRegAnchor _;
  76     obj.free_storage(obj.object TSRMLS_CC);
  77   }
  78
  79   bucket.bucket.free_list.next = m_free_list_head;
  80   m_free_list_head = handle;
  81   bucket.valid = 0;
  82 }
  83
  84 zend_object_handle ZendObjectStore::cloneObject(zend_object_handle handle) {
  85   TSRMLS_FETCH();
  86   zend_object_store_bucket & bucket = m_store.at(handle);
  87   assert(bucket.valid);
  88   auto & obj = bucket.bucket.obj;
  89   if (obj.clone == nullptr) {
  90     return 0;
  91   }
  92   void * new_object = nullptr;
  93   obj.clone(obj.object, &new_object TSRMLS_CC);
  94   assert(bucket.valid);
  95   return insertObject(new_object, obj.dtor, obj.free_storage, obj.clone);
  96 }
  97
  98 }