mfbt/RefCountType.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_RefCountType_h
   8 #define mozilla_RefCountType_h
   9
  10 #include <stdint.h>
  11
  12 /**
  13  * MozRefCountType is Mozilla's reference count type.
  14  *
  15  * We use the same type to represent the refcount of RefCounted objects
  16  * as well, in order to be able to use the leak detection facilities
  17  * that are implemented by XPCOM.
  18  *
  19  * Note that this type is not in the mozilla namespace so that it is
  20  * usable for both C and C++ code.
  21  */
  22 typedef uintptr_t MozRefCountType;
  23
  24 /*
  25  * This is the return type for AddRef() and Release() in nsISupports.
  26  * IUnknown of COM returns an unsigned long from equivalent functions.
  27  *
  28  * The following ifdef exists to maintain binary compatibility with
  29  * IUnknown, the base interface in Microsoft COM.
  30  */
  31 #ifdef XP_WIN
  32 typedef unsigned long MozExternalRefCountType;
  33 #else
  34 typedef uint32_t MozExternalRefCountType;
  35 #endif
  36
  37 #endif