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/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
#ifndef NAN_PERSISTENT_PRE_12_INL_H_
#define NAN_PERSISTENT_PRE_12_INL_H_
template<typename T>
class PersistentBase {
v8::Persistent<T> persistent;
template<typename U>
friend v8::Local<U> New(const PersistentBase<U> &p);
template<typename U, typename M>
friend v8::Local<U> New(const Persistent<U, M> &p);
template<typename U>
friend v8::Local<U> New(const Global<U> &p);
template<typename S> friend class ReturnValue;
public:
inline PersistentBase() :
persistent() {}
inline void Reset() {
persistent.Dispose();
persistent.Clear();
}
template<typename S>
inline void Reset(const v8::Local<S> &other) {
TYPE_CHECK(T, S);
if (!persistent.IsEmpty()) {
persistent.Dispose();
}
if (other.IsEmpty()) {
persistent.Clear();
} else {
persistent = v8::Persistent<T>::New(other);
}
}
template<typename S>
inline void Reset(const PersistentBase<S> &other) {
TYPE_CHECK(T, S);
if (!persistent.IsEmpty()) {
persistent.Dispose();
}
if (other.IsEmpty()) {
persistent.Clear();
} else {
persistent = v8::Persistent<T>::New(other.persistent);
}
}
inline bool IsEmpty() const { return persistent.IsEmpty(); }
inline void Empty() { persistent.Clear(); }
template<typename S>
inline bool operator==(const PersistentBase<S> &that) const {
return this->persistent == that.persistent;
}
template<typename S>
inline bool operator==(const v8::Local<S> &that) const {
return this->persistent == that;
}
template<typename S>
inline bool operator!=(const PersistentBase<S> &that) const {
return !operator==(that);
}
template<typename S>
inline bool operator!=(const v8::Local<S> &that) const {
return !operator==(that);
}
template<typename P>
inline void SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type);
inline void ClearWeak() { persistent.ClearWeak(); }
inline void MarkIndependent() { persistent.MarkIndependent(); }
inline bool IsIndependent() const { return persistent.IsIndependent(); }
inline bool IsNearDeath() const { return persistent.IsNearDeath(); }
inline bool IsWeak() const { return persistent.IsWeak(); }
private:
inline explicit PersistentBase(v8::Persistent<T> that) :
persistent(that) { }
inline explicit PersistentBase(T *val) : persistent(val) {}
template<typename S, typename M> friend class Persistent;
template<typename S> friend class Global;
friend class ObjectWrap;
};
template<typename T>
class NonCopyablePersistentTraits {
public:
typedef Persistent<T, NonCopyablePersistentTraits<T> >
NonCopyablePersistent;
static const bool kResetInDestructor = false;
template<typename S, typename M>
inline static void Copy(const Persistent<S, M> &source,
NonCopyablePersistent *dest) {
Uncompilable<v8::Object>();
}
template<typename O> inline static void Uncompilable() {
TYPE_CHECK(O, v8::Primitive);
}
};
template<typename T>
struct CopyablePersistentTraits {
typedef Persistent<T, CopyablePersistentTraits<T> > CopyablePersistent;
static const bool kResetInDestructor = true;
template<typename S, typename M>
static inline void Copy(const Persistent<S, M> &source,
CopyablePersistent *dest) {}
};
template<typename T, typename M> class Persistent :
public PersistentBase<T> {
public:
inline Persistent() {}
template<typename S> inline Persistent(v8::Handle<S> that)
: PersistentBase<T>(v8::Persistent<T>::New(that)) {
TYPE_CHECK(T, S);
}
inline Persistent(const Persistent &that) : PersistentBase<T>() {
Copy(that);
}
template<typename S, typename M2>
inline Persistent(const Persistent<S, M2> &that) :
PersistentBase<T>() {
Copy(that);
}
inline Persistent &operator=(const Persistent &that) {
Copy(that);
return *this;
}
template <class S, class M2>
inline Persistent &operator=(const Persistent<S, M2> &that) {
Copy(that);
return *this;
}
inline ~Persistent() {
if (M::kResetInDestructor) this->Reset();
}
private:
inline T *operator*() const { return *PersistentBase<T>::persistent; }
template<typename S, typename M2>
inline void Copy(const Persistent<S, M2> &that) {
TYPE_CHECK(T, S);
this->Reset();
if (!that.IsEmpty()) {
this->persistent = v8::Persistent<T>::New(that.persistent);
M::Copy(that, this);
}
}
};
template<typename T>
class Global : public PersistentBase<T> {
struct RValue {
inline explicit RValue(Global* obj) : object(obj) {}
Global* object;
};
public:
inline Global() : PersistentBase<T>(0) { }
template <typename S>
inline Global(v8::Local<S> that) // NOLINT(runtime/explicit)
: PersistentBase<T>(v8::Persistent<T>::New(that)) {
TYPE_CHECK(T, S);
}
template <typename S>
inline Global(const PersistentBase<S> &that) // NOLINT(runtime/explicit)
: PersistentBase<T>(that) {
TYPE_CHECK(T, S);
}
/**
* Move constructor.
*/
inline Global(RValue rvalue) // NOLINT(runtime/explicit)
: PersistentBase<T>(rvalue.object->persistent) {
rvalue.object->Reset();
}
inline ~Global() { this->Reset(); }
/**
* Move via assignment.
*/
template<typename S>
inline Global &operator=(Global<S> rhs) {
TYPE_CHECK(T, S);
this->Reset(rhs.persistent);
rhs.Reset();
return *this;
}
/**
* Cast operator for moves.
*/
inline operator RValue() { return RValue(this); }
/**
* Pass allows returning uniques from functions, etc.
*/
Global Pass() { return Global(RValue(this)); }
private:
Global(Global &);
void operator=(Global &);
template<typename S> friend class ReturnValue;
};
#endif // NAN_PERSISTENT_PRE_12_INL_H_
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