third_party/WebKit/Source/wtf/OwnPtrCommon.h

   1 /*
   2  * Copyright (C) 2009 Apple Inc. All rights reserved.
   3  * Copyright (C) 2009 Torch Mobile, Inc.
   4  * Copyright (C) 2010 Company 100 Inc.
   5  * Copyright (C) 2013 Intel Corporation. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  20  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  21  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  24  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef WTF_OwnPtrCommon_h
  30 #define WTF_OwnPtrCommon_h
  31
  32 #include "wtf/Assertions.h"
  33 #include "wtf/TypeTraits.h"
  34
  35 namespace WTF {
  36
  37 class RefCountedBase;
  38 class ThreadSafeRefCountedBase;
  39
  40 template<typename T>
  41 struct IsRefCounted {
  42     static const bool value = IsSubclass<T, RefCountedBase>::value
  43         || IsSubclass<T, ThreadSafeRefCountedBase>::value;
  44 };
  45
  46 template <typename T>
  47 struct OwnedPtrDeleter {
  48     static void deletePtr(T* ptr)
  49     {
  50         static_assert(!IsRefCounted<T>::value, "use RefPtr for RefCounted objects");
  51         static_assert(sizeof(T) > 0, "type must be complete");
  52         delete ptr;
  53     }
  54 };
  55
  56 template <typename T>
  57 struct OwnedPtrDeleter<T[]> {
  58     static void deletePtr(T* ptr)
  59     {
  60         static_assert(!IsRefCounted<T>::value, "use RefPtr for RefCounted objects");
  61         static_assert(sizeof(T) > 0, "type must be complete");
  62         delete[] ptr;
  63     }
  64 };
  65
  66 template <class T, int n>
  67 struct OwnedPtrDeleter<T[n]> {
  68     static_assert(sizeof(T) < 0, "do not use array with size as type");
  69 };
  70
  71 } // namespace WTF
  72
  73 #endif // WTF_OwnPtrCommon_h