From fe0179ded8202939ea4f2b92a879b8dede7821ea Mon Sep 17 00:00:00 2001 From: tsepez Date: Thu, 22 Sep 2016 13:42:34 -0700 Subject: Rename CPDF_CountedObject to CFX_WeakPtr::Handle This better describes its purpose, and reduces confusion with the CFX_CountRef class, which is unrelated. The WeakPtr class itself that manipulates handles is NYI. Review-Url: https://codereview.chromium.org/2366673003 --- core/fxcrt/include/cfx_weak_ptr.h | 48 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 core/fxcrt/include/cfx_weak_ptr.h (limited to 'core/fxcrt/include') diff --git a/core/fxcrt/include/cfx_weak_ptr.h b/core/fxcrt/include/cfx_weak_ptr.h new file mode 100644 index 0000000000..ea71cd01fd --- /dev/null +++ b/core/fxcrt/include/cfx_weak_ptr.h @@ -0,0 +1,48 @@ +// 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 "core/fxcrt/include/fx_system.h" + +template +class CFX_WeakPtr { + public: + class Handle { + public: + explicit Handle(T* ptr) : m_nCount(1), m_pObj(ptr) {} + void reset(T* ptr) { // CAUTION: tosses prior ref counts. + m_nCount = 1; + m_pObj = ptr; + } + void clear() { // Now you're all weak ptrs ... + // Guard against accidental re-entry. + T* pObj = m_pObj; + m_pObj = nullptr; + delete pObj; + } + T* get() const { return m_pObj; } + T* AddRef() { + ASSERT(m_pObj); + ++m_nCount; + return m_pObj; + } + void RemoveRef() { + if (m_nCount) + --m_nCount; + } + size_t use_count() const { return m_nCount; } + + protected: + size_t m_nCount; + T* m_pObj; + }; + + // TODO(tsepez): implement weak pointer operations themselves. +}; + +#endif // CORE_FXCRT_INCLUDE_CFX_WEAK_PTR_H_ -- cgit v1.2.3