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doc	[ DIR ]	drwxr-xr-x	2021-02-04 21:24
tools	[ DIR ]	drwxr-xr-x	2021-02-04 21:24
CHANGELOG.md	19.83 KB	-rw-r--r--	2018-09-29 08:04
LICENSE.md	1.19 KB	-rw-r--r--	2018-02-22 17:07
README.md	27.94 KB	-rw-r--r--	2018-09-29 08:04
include_dirs.js	55 B	-rw-r--r--	2017-04-05 22:07
nan-2.11.1.tgz	72.81 KB	-rw-r--r--	2018-09-29 08:09
nan.h	83.32 KB	-rw-r--r--	2018-09-29 08:05
nan_callbacks.h	3.02 KB	-rw-r--r--	2018-02-22 17:07
nan_callbacks_12_inl.h	17.13 KB	-rw-r--r--	2018-08-25 12:11
nan_callbacks_pre_12_inl.h	16.68 KB	-rw-r--r--	2018-02-22 17:07
nan_converters.h	2.06 KB	-rw-r--r--	2018-02-22 17:07
nan_converters_43_inl.h	1.69 KB	-rw-r--r--	2018-03-16 15:57
nan_converters_pre_43_inl.h	1.22 KB	-rw-r--r--	2018-02-22 17:07
nan_define_own_property_helper.h	1 KB	-rw-r--r--	2018-03-16 15:57
nan_implementation_12_inl.h	13.95 KB	-rw-r--r--	2018-09-29 08:02
nan_implementation_pre_12_inl.h	7.76 KB	-rw-r--r--	2018-02-22 17:07
nan_json.h	5.64 KB	-rw-r--r--	2018-02-22 17:07
nan_maybe_43_inl.h	12.29 KB	-rw-r--r--	2018-03-16 15:57
nan_maybe_pre_43_inl.h	8.04 KB	-rw-r--r--	2018-03-16 15:57
nan_new.h	8.58 KB	-rw-r--r--	2018-02-22 17:07
nan_object_wrap.h	4 KB	-rw-r--r--	2018-02-22 17:07
nan_persistent_12_inl.h	3.78 KB	-rw-r--r--	2018-02-22 17:07
nan_persistent_pre_12_inl.h	6.01 KB	-rw-r--r--	2018-02-22 17:07
nan_private.h	2.42 KB	-rw-r--r--	2018-02-22 17:07
nan_string_bytes.h	7.91 KB	-rw-r--r--	2017-04-05 22:07
nan_typedarray_contents.h	2.8 KB	-rw-r--r--	2018-02-22 17:07
nan_weak.h	14.65 KB	-rw-r--r--	2018-02-22 17:07
package.json	2.56 KB	-rw-r--r--	2021-02-04 21:24

Rename

/*********************************************************************
 * NAN - Native Abstractions for Node.js
 *
 * Copyright (c) 2018 NAN contributors
 *
 * MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
 ********************************************************************/

#ifndef NAN_OBJECT_WRAP_H_
#define NAN_OBJECT_WRAP_H_

class ObjectWrap {
 public:
  ObjectWrap() {
    refs_ = 0;
  }

virtual ~ObjectWrap() {
    if (persistent().IsEmpty()) {
      return;
    }

assert(persistent().IsNearDeath());
    persistent().ClearWeak();
    persistent().Reset();
  }

template <class T>
  static inline T* Unwrap(v8::Local<v8::Object> object) {
    assert(!object.IsEmpty());
    assert(object->InternalFieldCount() > 0);
    // Cast to ObjectWrap before casting to T.  A direct cast from void
    // to T won't work right when T has more than one base class.
    void* ptr = GetInternalFieldPointer(object, 0);
    ObjectWrap* wrap = static_cast<ObjectWrap*>(ptr);
    return static_cast<T*>(wrap);
  }

inline v8::Local<v8::Object> handle() const {
    return New(handle_);
  }

inline Persistent<v8::Object>& persistent() {
    return handle_;
  }

protected:
  inline void Wrap(v8::Local<v8::Object> object) {
    assert(persistent().IsEmpty());
    assert(object->InternalFieldCount() > 0);
    SetInternalFieldPointer(object, 0, this);
    persistent().Reset(object);
    MakeWeak();
  }

#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 ||                      \
  (V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))

inline void MakeWeak() {
    persistent().v8::PersistentBase<v8::Object>::SetWeak(
        this, WeakCallback, v8::WeakCallbackType::kParameter);
    persistent().MarkIndependent();
  }

#elif NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION

inline void MakeWeak() {
    persistent().v8::PersistentBase<v8::Object>::SetWeak(this, WeakCallback);
    persistent().MarkIndependent();
  }

#else

inline void MakeWeak() {
    persistent().persistent.MakeWeak(this, WeakCallback);
    persistent().MarkIndependent();
  }

#endif

/* Ref() marks the object as being attached to an event loop.
   * Refed objects will not be garbage collected, even if
   * all references are lost.
   */
  virtual void Ref() {
    assert(!persistent().IsEmpty());
    persistent().ClearWeak();
    refs_++;
  }

/* Unref() marks an object as detached from the event loop.  This is its
   * default state.  When an object with a "weak" reference changes from
   * attached to detached state it will be freed. Be careful not to access
   * the object after making this call as it might be gone!
   * (A "weak reference" means an object that only has a
   * persistant handle.)
   *
   * DO NOT CALL THIS FROM DESTRUCTOR
   */
  virtual void Unref() {
    assert(!persistent().IsEmpty());
    assert(!persistent().IsWeak());
    assert(refs_ > 0);
    if (--refs_ == 0)
      MakeWeak();
  }

int refs_;  // ro

private:
  NAN_DISALLOW_ASSIGN_COPY_MOVE(ObjectWrap)
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 4 ||                      \
  (V8_MAJOR_VERSION == 4 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 3))

static void
  WeakCallback(v8::WeakCallbackInfo<ObjectWrap> const& info) {
    ObjectWrap* wrap = info.GetParameter();
    assert(wrap->refs_ == 0);
    assert(wrap->handle_.IsNearDeath());
    wrap->handle_.Reset();
    delete wrap;
  }

#elif NODE_MODULE_VERSION > NODE_0_10_MODULE_VERSION

static void
  WeakCallback(v8::WeakCallbackData<v8::Object, ObjectWrap> const& data) {
    ObjectWrap* wrap = data.GetParameter();
    assert(wrap->refs_ == 0);
    assert(wrap->handle_.IsNearDeath());
    wrap->handle_.Reset();
    delete wrap;
  }

#else

static void WeakCallback(v8::Persistent<v8::Value> value, void *data) {
    ObjectWrap *wrap = static_cast<ObjectWrap*>(data);
    assert(wrap->refs_ == 0);
    assert(wrap->handle_.IsNearDeath());
    wrap->handle_.Reset();
    delete wrap;
  }

#endif
  Persistent<v8::Object> handle_;
};

#endif  // NAN_OBJECT_WRAP_H_