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Unified Diff: core/fxcrt/include/cfx_count_ref.h

Issue 2382723003: Move core/fxcrt/include to core/fxcrt (Closed)
Patch Set: Rebase to master Created 4 years, 3 months ago
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Index: core/fxcrt/include/cfx_count_ref.h
diff --git a/core/fxcrt/include/cfx_count_ref.h b/core/fxcrt/include/cfx_count_ref.h
deleted file mode 100644
index a879967b28ff6c338ec154101743654e3bfa7739..0000000000000000000000000000000000000000
--- a/core/fxcrt/include/cfx_count_ref.h
+++ /dev/null
@@ -1,81 +0,0 @@
-// 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_COUNT_REF_H_
-#define CORE_FXCRT_INCLUDE_CFX_COUNT_REF_H_
-
-#include "core/fxcrt/include/cfx_retain_ptr.h"
-#include "core/fxcrt/include/fx_system.h"
-
-// A shared object with Copy on Write semantics that makes it appear as
-// if each one were independent.
-template <class ObjClass>
-class CFX_CountRef {
- public:
- CFX_CountRef() {}
- CFX_CountRef(const CFX_CountRef& other) : m_pObject(other.m_pObject) {}
- ~CFX_CountRef() {}
-
- template <typename... Args>
- ObjClass* Emplace(Args... params) {
- m_pObject.Reset(new CountedObj(params...));
- return m_pObject.Get();
- }
-
- CFX_CountRef& operator=(const CFX_CountRef& that) {
- if (*this != that)
- m_pObject = that.m_pObject;
- return *this;
- }
-
- void SetNull() { m_pObject.Reset(); }
- const ObjClass* GetObject() const { return m_pObject.Get(); }
-
- template <typename... Args>
- ObjClass* GetPrivateCopy(Args... params) {
- if (!m_pObject)
- return Emplace(params...);
- if (!m_pObject->HasOneRef())
- m_pObject.Reset(new CountedObj(*m_pObject));
- return m_pObject.Get();
- }
-
- bool operator==(const CFX_CountRef& that) const {
- return m_pObject == that.m_pObject;
- }
- bool operator!=(const CFX_CountRef& that) const { return !(*this == that); }
- explicit operator bool() const { return !!m_pObject; }
-
- private:
- class CountedObj : public ObjClass {
- public:
- template <typename... Args>
- CountedObj(Args... params) : ObjClass(params...), m_RefCount(0) {}
-
- CountedObj(const CountedObj& src) : ObjClass(src), m_RefCount(0) {}
- ~CountedObj() { m_RefCount = 0; }
-
- bool HasOneRef() const { return m_RefCount == 1; }
- void Retain() { m_RefCount++; }
- void Release() {
- ASSERT(m_RefCount);
- if (--m_RefCount == 0)
- delete this;
- }
-
- private:
- // To ensure ref counts do not overflow, consider the worst possible case:
- // the entire address space contains nothing but pointers to this object.
- // Since the count increments with each new pointer, the largest value is
- // the number of pointers that can fit into the address space. The size of
- // the address space itself is a good upper bound on it.
- intptr_t m_RefCount;
- };
-
- CFX_RetainPtr<CountedObj> m_pObject;
-};
-
-#endif // CORE_FXCRT_INCLUDE_CFX_COUNT_REF_H_
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