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#pragma once
#include "base/assert.hpp"
#include "base/mutex.hpp"
#include "std/map.hpp"
#include "std/mutex.hpp"
#include "std/type_traits.hpp"
#include "std/typeinfo.hpp"
//#define TRACK_POINTERS
/// This class tracks usage of drape_ptr's and ref_ptr's
class DpPointerTracker
{
public:
typedef map<void *, pair<int, string> > TAlivePointers;
static DpPointerTracker & Instance();
template <typename T>
void RefPtr(T * refPtr)
{
RefPtrNamed(static_cast<void*>(refPtr), typeid(refPtr).name());
}
void DerefPtr(void * p);
void DestroyPtr(void * p);
TAlivePointers const & GetAlivePointers() const;
private:
DpPointerTracker() = default;
~DpPointerTracker();
void RefPtrNamed(void * refPtr, string const & name);
TAlivePointers m_alivePointers;
mutex m_mutex;
};
// Custom deleter for unique_ptr
class DpPointerDeleter
{
public:
template <typename T>
void operator()(T * p)
{
DpPointerTracker::Instance().DestroyPtr(p);
delete p;
}
};
#if defined(TRACK_POINTERS)
template<typename T> using drape_ptr = unique_ptr<T, DpPointerDeleter>;
#else
template<typename T> using drape_ptr = unique_ptr<T>;
#endif
template <typename T, typename... Args>
drape_ptr<T> make_unique_dp(Args &&... args)
{
return drape_ptr<T>(new T(std::forward<Args>(args)...));
}
template<typename T>
class ref_ptr
{
public:
ref_ptr()
: m_ptr(nullptr), m_isOwnerUnique(false)
{}
ref_ptr(T * ptr, bool isOwnerUnique = false)
: m_ptr(ptr), m_isOwnerUnique(isOwnerUnique)
{
#if defined(TRACK_POINTERS)
if (m_isOwnerUnique)
DpPointerTracker::Instance().RefPtr(m_ptr);
#endif
}
ref_ptr(ref_ptr const & rhs)
: m_ptr(rhs.m_ptr), m_isOwnerUnique(rhs.m_isOwnerUnique)
{
#if defined(TRACK_POINTERS)
if (m_isOwnerUnique)
DpPointerTracker::Instance().RefPtr(m_ptr);
#endif
}
ref_ptr(ref_ptr && rhs)
{
m_ptr = rhs.m_ptr;
rhs.m_ptr = nullptr;
m_isOwnerUnique = rhs.m_isOwnerUnique;
rhs.m_isOwnerUnique = false;
}
~ref_ptr()
{
#if defined(TRACK_POINTERS)
if (m_isOwnerUnique)
DpPointerTracker::Instance().DerefPtr(m_ptr);
#endif
m_ptr = nullptr;
}
T * operator->() const { return m_ptr; }
template<typename TResult>
operator ref_ptr<TResult>() const
{
static_assert(is_base_of<TResult, T>::value || is_base_of<T, TResult>::value ||
is_void<T>::value || is_void<TResult>::value, "");
return ref_ptr<TResult>(static_cast<TResult *>(m_ptr), m_isOwnerUnique);
}
template<typename TResult>
ref_ptr<TResult> downcast() const
{
ASSERT(dynamic_cast<TResult *>(m_ptr) != nullptr, ());
return ref_ptr<TResult>(static_cast<TResult *>(m_ptr), m_isOwnerUnique);
}
operator bool() const { return m_ptr != nullptr; }
bool operator==(ref_ptr const & rhs) const { return m_ptr == rhs.m_ptr; }
bool operator==(T * rhs) const { return m_ptr == rhs; }
bool operator!=(ref_ptr const & rhs) const { return !operator==(rhs); }
bool operator!=(T * rhs) const { return !operator==(rhs); }
bool operator<(ref_ptr const & rhs) const { return m_ptr < rhs.m_ptr; }
template<typename TResult, class = typename enable_if<!is_void<TResult>::value>::type>
TResult & operator*() const
{
return *m_ptr;
}
ref_ptr & operator=(ref_ptr const & rhs)
{
if (this == &rhs)
return *this;
#if defined(TRACK_POINTERS)
if (m_isOwnerUnique)
DpPointerTracker::Instance().DerefPtr(m_ptr);
#endif
m_ptr = rhs.m_ptr;
m_isOwnerUnique = rhs.m_isOwnerUnique;
#if defined(TRACK_POINTERS)
if (m_isOwnerUnique)
DpPointerTracker::Instance().RefPtr(m_ptr);
#endif
return *this;
}
ref_ptr & operator=(ref_ptr && rhs)
{
if (this == &rhs)
return *this;
#if defined(TRACK_POINTERS)
if (m_isOwnerUnique)
DpPointerTracker::Instance().DerefPtr(m_ptr);
#endif
m_ptr = rhs.m_ptr;
rhs.m_ptr = nullptr;
m_isOwnerUnique = rhs.m_isOwnerUnique;
rhs.m_isOwnerUnique = false;
return *this;
}
T * get() const { return m_ptr; }
private:
T* m_ptr;
bool m_isOwnerUnique;
template <typename TResult>
friend inline string DebugPrint(ref_ptr<TResult> const & v);
};
template <typename T>
inline string DebugPrint(ref_ptr<T> const & v)
{
return DebugPrint(v.m_ptr);
}
template <typename T>
ref_ptr<T> make_ref(drape_ptr<T> const & drapePtr)
{
return ref_ptr<T>(drapePtr.get(), true);
}
template <typename T>
ref_ptr<T> make_ref(T* ptr)
{
return ref_ptr<T>(ptr, false);
}
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