File indexing completed on 2024-05-12 15:43:39

 /*
  *  Copyright (C) 2006 Apple Computer, Inc.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public License
  *  along with this library; see the file COPYING.LIB.  If not, write to
  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  *  Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef WTF_OwnPtr_h
 #define WTF_OwnPtr_h
 
 #include <algorithm>
 #include <wtf/Assertions.h>
 #include <wtf/Noncopyable.h>
 
 namespace WTF
 {
 
 template <typename T> class OwnPtr : Noncopyable
 {
 public:
     explicit OwnPtr(T *ptr = nullptr) : m_ptr(ptr) { }
     ~OwnPtr()
     {
         safeDelete();
     }
 
     T *get() const
     {
         return m_ptr;
     }
     T *release()
     {
         T *ptr = m_ptr;
         m_ptr = nullptr;
         return ptr;
     }
 
     void set(T *ptr)
     {
         ASSERT(m_ptr != ptr);
         safeDelete();
         m_ptr = ptr;
     }
     void clear()
     {
         safeDelete();
         m_ptr = nullptr;
     }
 
     T &operator*() const
     {
         ASSERT(m_ptr);
         return *m_ptr;
     }
     T *operator->() const
     {
         ASSERT(m_ptr);
         return m_ptr;
     }
 
     bool operator!() const
     {
         return !m_ptr;
     }
 
     // This conversion operator allows implicit conversion to bool but not to other integer types.
     typedef T *(OwnPtr::*UnspecifiedBoolType)() const;
     operator UnspecifiedBoolType() const
     {
         return m_ptr ? &OwnPtr::get : nullptr;
     }
 
     void swap(OwnPtr &o)
     {
         std::swap(m_ptr, o.m_ptr);
     }
 
 private:
     void safeDelete()
     {
         typedef char known[sizeof(T) ? 1 : -1];
         if (sizeof(known)) {
             delete m_ptr;
         }
     }
 
     T *m_ptr;
 };
 
 template <typename T> inline void swap(OwnPtr<T> &a, OwnPtr<T> &b)
 {
     a.swap(b);
 }
 
 } // namespace WTF
 
 using WTF::OwnPtr;
 
 #endif // WTF_OwnPtr_h