/usr/include/nan_persistent_pre_12_inl.h is in node-nan 2.2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2016 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:
NAN_INLINE PersistentBase() :
persistent() {}
NAN_INLINE void Reset() {
persistent.Dispose();
persistent.Clear();
}
template<typename S>
NAN_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>
NAN_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);
}
}
NAN_INLINE bool IsEmpty() const { return persistent.IsEmpty(); }
NAN_INLINE void Empty() { persistent.Clear(); }
template<typename S>
NAN_INLINE bool operator==(const PersistentBase<S> &that) {
return this->persistent == that.persistent;
}
template<typename S>
NAN_INLINE bool operator==(const v8::Local<S> &that) {
return this->persistent == that;
}
template<typename S>
NAN_INLINE bool operator!=(const PersistentBase<S> &that) {
return !operator==(that);
}
template<typename S>
NAN_INLINE bool operator!=(const v8::Local<S> &that) {
return !operator==(that);
}
template<typename P>
NAN_INLINE void SetWeak(
P *parameter
, typename WeakCallbackInfo<P>::Callback callback
, WeakCallbackType type);
NAN_INLINE void ClearWeak() { persistent.ClearWeak(); }
NAN_INLINE void MarkIndependent() { persistent.MarkIndependent(); }
NAN_INLINE bool IsIndependent() const { return persistent.IsIndependent(); }
NAN_INLINE bool IsNearDeath() const { return persistent.IsNearDeath(); }
NAN_INLINE bool IsWeak() const { return persistent.IsWeak(); }
private:
NAN_INLINE explicit PersistentBase(v8::Persistent<T> that) :
persistent(that) { }
NAN_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>
NAN_INLINE static void Copy(const Persistent<S, M> &source,
NonCopyablePersistent *dest) {
Uncompilable<v8::Object>();
}
template<typename O> NAN_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 NAN_INLINE void Copy(const Persistent<S, M> &source,
CopyablePersistent *dest) {}
};
template<typename T, typename M> class Persistent :
public PersistentBase<T> {
public:
NAN_INLINE Persistent() {}
template<typename S> NAN_INLINE Persistent(v8::Handle<S> that)
: PersistentBase<T>(v8::Persistent<T>::New(that)) {
TYPE_CHECK(T, S);
}
NAN_INLINE Persistent(const Persistent &that) : PersistentBase<T>() {
Copy(that);
}
template<typename S, typename M2>
NAN_INLINE Persistent(const Persistent<S, M2> &that) :
PersistentBase<T>() {
Copy(that);
}
NAN_INLINE Persistent &operator=(const Persistent &that) {
Copy(that);
return *this;
}
template <class S, class M2>
NAN_INLINE Persistent &operator=(const Persistent<S, M2> &that) {
Copy(that);
return *this;
}
NAN_INLINE ~Persistent() {
if (M::kResetInDestructor) this->Reset();
}
private:
NAN_INLINE T *operator*() const { return *PersistentBase<T>::persistent; }
template<typename S, typename M2>
NAN_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 {
NAN_INLINE explicit RValue(Global* obj) : object(obj) {}
Global* object;
};
public:
NAN_INLINE Global() : PersistentBase<T>(0) { }
template <typename S>
NAN_INLINE Global(v8::Local<S> that)
: PersistentBase<T>(v8::Persistent<T>::New(that)) {
TYPE_CHECK(T, S);
}
template <typename S>
NAN_INLINE Global(const PersistentBase<S> &that)
: PersistentBase<T>(that) {
TYPE_CHECK(T, S);
}
/**
* Move constructor.
*/
NAN_INLINE Global(RValue rvalue)
: PersistentBase<T>(rvalue.object->persistent) {
rvalue.object->Reset();
}
NAN_INLINE ~Global() { this->Reset(); }
/**
* Move via assignment.
*/
template<typename S>
NAN_INLINE Global &operator=(Global<S> rhs) {
TYPE_CHECK(T, S);
this->Reset(rhs.persistent);
rhs.Reset();
return *this;
}
/**
* Cast operator for moves.
*/
NAN_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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