nan/test/cpp/weak.cpp at main · nodejs/nan · GitHub

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/*********************************************************************

* NAN - Native Abstractions for Node.js

* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>

********************************************************************/

#include <nan.h>

using namespace Nan; // NOLINT(build/namespaces)

static AsyncResource* async_resource;

static Persistent<v8::Function> cb;

void weakCallback(

const WeakCallbackInfo<int> &data) { // NOLINT(runtime/references)

HandleScope scope;

int *parameter = data.GetParameter();

v8::Local<v8::Value> val = New(*parameter);

async_resource->runInAsyncScope(

GetCurrentContext()->Global(), New(cb), 1, &val);

delete async_resource;

delete parameter;

}

v8::Local<v8::String> wrap(v8::Local<v8::Function> func) {

EscapableHandleScope scope;

v8::Local<v8::String> lstring = New<v8::String>("result").ToLocalChecked();

int *parameter = new int(42);

Persistent<v8::Function> persistent(func);

persistent.SetWeak(parameter, weakCallback, WeakCallbackType::kParameter);

assert(persistent.IsWeak());

return scope.Escape(lstring);

}

NAN_METHOD(Hustle) {

async_resource = new AsyncResource("nan:test:weak");

cb.Reset(To<v8::Function>(info[1]).ToLocalChecked());

info.GetReturnValue().Set(wrap(To<v8::Function>(info[0]).ToLocalChecked()));

}

inline void WeakExternalCallback(const WeakCallbackInfo<void>&) {}

NAN_METHOD(WeakExternal) {

void* baton = &baton; // Actual value doesn't really matter.

Persistent<v8::External> external(New<v8::External>(baton));

external.SetWeak(baton, WeakExternalCallback, WeakCallbackType::kParameter);

}

NAN_MODULE_INIT(Init) {

Set(target

, New<v8::String>("hustle").ToLocalChecked()

, GetFunction(New<v8::FunctionTemplate>(Hustle)).ToLocalChecked()

);

Set(target

, New<v8::String>("weakExternal").ToLocalChecked()

, GetFunction(New<v8::FunctionTemplate>(WeakExternal)).ToLocalChecked()

);

}

NODE_MODULE(weak, Init)

nan/test/cpp/weak.cpp at main · nodejs/nan · GitHub

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nan/test/cpp/weak.cpp at main · nodejs/nan · GitHub

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