mirror of https://github.com/PCSX2/pcsx2.git
141 lines
3.5 KiB
C++
141 lines
3.5 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2010 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "Threading.h"
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using Threading::ScopedLock;
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// --------------------------------------------------------------------------------------
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// ScopedPtrMT
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// --------------------------------------------------------------------------------------
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template <typename T>
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class ScopedPtrMT
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{
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DeclareNoncopyableObject(ScopedPtrMT);
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protected:
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std::atomic<T *> m_ptr;
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Threading::Mutex m_mtx;
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public:
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typedef T element_type;
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wxEXPLICIT ScopedPtrMT(T *ptr = nullptr)
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{
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m_ptr = ptr;
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}
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~ScopedPtrMT() { _Delete_unlocked(); }
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ScopedPtrMT &Reassign(T *ptr = nullptr)
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{
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T *doh = m_ptr.exchange(ptr);
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if (ptr != doh)
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delete doh;
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return *this;
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}
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ScopedPtrMT &Delete() noexcept
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{
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ScopedLock lock(m_mtx);
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_Delete_unlocked();
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}
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// Removes the pointer from scoped management, but does not delete!
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// (ScopedPtr will be nullptr after this method)
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T *DetachPtr()
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{
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ScopedLock lock(m_mtx);
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return m_ptr.exchange(nullptr);
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}
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// Returns the managed pointer. Can return nullptr as a valid result if the ScopedPtrMT
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// has no object in management.
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T *GetPtr() const
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{
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return m_ptr;
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}
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void SwapPtr(ScopedPtrMT &other)
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{
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ScopedLock lock(m_mtx);
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m_ptr.exchange(other.m_ptr.exchange(m_ptr.load()));
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T *const tmp = other.m_ptr;
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other.m_ptr = m_ptr;
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m_ptr = tmp;
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}
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// ----------------------------------------------------------------------------
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// ScopedPtrMT Operators
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// ----------------------------------------------------------------------------
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// I've decided to use the ATL's approach to pointer validity tests, opposed to
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// the wx/boost approach (which uses some bizarre member method pointer crap, and can't
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// allow the T* implicit casting.
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bool operator!() const noexcept
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{
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return m_ptr.load() == nullptr;
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}
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// Equality
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bool operator==(T *pT) const noexcept
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{
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return m_ptr == pT;
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}
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// Inequality
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bool operator!=(T *pT) const noexcept
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{
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return !operator==(pT);
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}
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// Convenient assignment operator. ScopedPtrMT = nullptr will issue an automatic deletion
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// of the managed pointer.
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ScopedPtrMT &operator=(T *src)
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{
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return Reassign(src);
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}
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#if 0
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operator T*() const
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{
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return m_ptr;
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}
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// Dereference operator, returns a handle to the managed pointer.
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// Generates a debug assertion if the object is nullptr!
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T& operator*() const
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{
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pxAssert(m_ptr != nullptr);
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return *m_ptr;
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}
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T* operator->() const
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{
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pxAssert(m_ptr != nullptr);
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return m_ptr;
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}
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#endif
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protected:
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void _Delete_unlocked() noexcept
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{
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delete m_ptr.exchange(nullptr);
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}
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};
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