// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef CORE_FPDFAPI_FPDF_PAGE_CPDF_COUNTEDOBJECT_H_
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#define CORE_FPDFAPI_FPDF_PAGE_CPDF_COUNTEDOBJECT_H_
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#include "core/fpdfapi/fpdf_page/cpdf_pattern.h"
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#include "core/fpdfapi/fpdf_page/include/cpdf_colorspace.h"
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#include "core/fxcrt/include/fx_system.h"
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template <class T>
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class CPDF_CountedObject {
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public:
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explicit CPDF_CountedObject(T* ptr) : m_nCount(1), m_pObj(ptr) {}
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void reset(T* ptr) { // CAUTION: tosses prior ref counts.
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m_nCount = 1;
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m_pObj = ptr;
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}
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void clear() { // Now you're all weak ptrs ...
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delete m_pObj;
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m_pObj = nullptr;
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}
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T* get() const { return m_pObj; }
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T* AddRef() {
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ASSERT(m_pObj);
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++m_nCount;
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return m_pObj;
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}
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void RemoveRef() {
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if (m_nCount)
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--m_nCount;
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}
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size_t use_count() const { return m_nCount; }
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protected:
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size_t m_nCount;
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T* m_pObj;
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};
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using CPDF_CountedColorSpace = CPDF_CountedObject<CPDF_ColorSpace>;
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using CPDF_CountedPattern = CPDF_CountedObject<CPDF_Pattern>;
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#endif // CORE_FPDFAPI_FPDF_PAGE_CPDF_COUNTEDOBJECT_H_
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