RK-archives/ruoyi-ui/node_modules/node-addon-api/doc/external.md

External (template)

The Napi::External template class implements the ability to create a Napi::Value object with arbitrary C++ data. It is the user's responsibility to manage the memory for the arbitrary C++ data.

Napi::External objects can be created with an optional Finalizer function and optional Hint value. The Finalizer function, if specified, is called when your Napi::External object is released by Node's garbage collector. It gives your code the opportunity to free any dynamically created data. If you specify a Hint value, it is passed to your Finalizer function.

Methods

New

template <typename T>
static Napi::External Napi::External::New(napi_env env, T* data);

• [in] env: The napi_env environment in which to construct the Napi::External object.
• [in] data: The arbitrary C++ data to be held by the Napi::External object.

Returns the created Napi::External<T> object.

New

template <typename T>
static Napi::External Napi::External::New(napi_env env,
                    T* data,
                    Finalizer finalizeCallback);

• [in] env: The napi_env environment in which to construct the Napi::External object.
• [in] data: The arbitrary C++ data to be held by the Napi::External object.
• [in] finalizeCallback: A function called when the Napi::External object is released by the garbage collector accepting a T* and returning void.

Returns the created Napi::External<T> object.

New

template <typename T>
static Napi::External Napi::External::New(napi_env env,
                    T* data,
                    Finalizer finalizeCallback,
                    Hint* finalizeHint);

• [in] env: The napi_env environment in which to construct the Napi::External object.
• [in] data: The arbitrary C++ data to be held by the Napi::External object.
• [in] finalizeCallback: A function called when the Napi::External object is released by the garbage collector accepting T* and Hint* parameters and returning void.
• [in] finalizeHint: A hint value passed to the finalizeCallback function.

Returns the created Napi::External<T> object.

Data

T* Napi::External::Data() const;

Returns a pointer to the arbitrary C++ data held by the Napi::External object.