Move core/fxcrt/include to core/fxcrt

core/fxcrt/include/cfx_weak_ptr.h

-// Copyright 2016 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef CORE_FXCRT_INCLUDE_CFX_WEAK_PTR_H_
-#define CORE_FXCRT_INCLUDE_CFX_WEAK_PTR_H_
-
-#include <memory>
-
-#include "core/fxcrt/include/cfx_retain_ptr.h"
-#include "core/fxcrt/include/fx_system.h"
-
-template <class T, class D = std::default_delete<T>>
-class CFX_WeakPtr {
- public:
-  CFX_WeakPtr() {}
-  CFX_WeakPtr(const CFX_WeakPtr& that) : m_pHandle(that.m_pHandle) {}
-  CFX_WeakPtr(CFX_WeakPtr&& that) { Swap(that); }
-  CFX_WeakPtr(std::unique_ptr<T, D> pObj)
-      : m_pHandle(new Handle(std::move(pObj))) {}
-
-  explicit operator bool() const { return m_pHandle && !!m_pHandle->Get(); }
-  bool HasOneRef() const { return m_pHandle && m_pHandle->HasOneRef(); }
-  T* operator->() { return m_pHandle->Get(); }
-  const T* operator->() const { return m_pHandle->Get(); }
-  CFX_WeakPtr& operator=(const CFX_WeakPtr& that) {
-    m_pHandle = that.m_pHandle;
-    return *this;
-  }
-  bool operator==(const CFX_WeakPtr& that) const {
-    return m_pHandle == that.m_pHandle;
-  }
-  bool operator!=(const CFX_WeakPtr& that) const { return !(*this == that); }
-
-  T* Get() const { return m_pHandle ? m_pHandle->Get() : nullptr; }
-  void Clear() {
-    if (m_pHandle) {
-      m_pHandle->Clear();
-      m_pHandle.Reset();
-    }
-  }
-  void Reset() { m_pHandle.Reset(); }
-  void Reset(std::unique_ptr<T, D> pObj) {
-    m_pHandle.Reset(new Handle(std::move(pObj)));
-  }
-  void Swap(CFX_WeakPtr& that) { m_pHandle.Swap(that.m_pHandle); }
-
- private:
-  class Handle {
-   public:
-    explicit Handle(std::unique_ptr<T, D> ptr)
-        : m_nCount(0), m_pObj(std::move(ptr)) {}
-    void Reset(std::unique_ptr<T, D> ptr) { m_pObj = std::move(ptr); }
-    void Clear() {     // Now you're all weak ptrs ...
-      m_pObj.reset();  // unique_ptr nulls first before invoking delete.
-    }
-    T* Get() const { return m_pObj.get(); }
-    T* Retain() {
-      ++m_nCount;
-      return m_pObj.get();
-    }
-    void Release() {
-      if (--m_nCount == 0)
-        delete this;
-    }
-    bool HasOneRef() const { return m_nCount == 1; }
-
-   private:
-    ~Handle() {}
-
-    intptr_t m_nCount;
-    std::unique_ptr<T, D> m_pObj;
-  };
-
-  CFX_RetainPtr<Handle> m_pHandle;
-};
-
-#endif  // CORE_FXCRT_INCLUDE_CFX_WEAK_PTR_H_