为什么 "Isolate::GerCurrent()" 在异步线程中为空?

Why is "Isolate::GerCurrent()" Null in asynchronous thread?

我的最终目标是解决这个 problem,但我在一些非常基本的东西上卡住了。

我的整个C++ Module基本如下:

void AsyncWork(void *arg) {
    Isolate* isolate = Isolate::GetCurrent();  // isolate is NULL
    if (isolate != NULL) {
        HandleScope scope(isolate);
    }
    else {
        printf("isolate is null\n");
        return;
    }
    // ...
}


void testAsync(const FunctionCallbackInfo<Value>& args) {
    uv_thread_t id;
    int data = 10;
    uv_thread_create(&id, AsyncWork, &data);
}

void init(Handle<Object> target) {
  NODE_SET_METHOD(target, "testAsync", testAsync);
}

NODE_MODULE(MyCppModule, init);

为什么我在 AsyncWork 中调用 Isolate::GetCurrent()isolate 为 NULL?

好吧,我好像设置错了,不应该在工作线程中调用 Isolate::GetCurrent()。而是在主线程上注册一个回调。

static uv_async_t async;
static int i;

void AsyncWork(void *arg) {
    for (i = 0; i < 5; ++i) {
        async.data = (void*)&i;
        uv_async_send(&async);
        Sleep(1000);
    }
}

void testCallback(uv_async_t *handle) {
    Isolate* isolate = Isolate::GetCurrent();
    if (isolate != NULL) {
        HandleScope scope(isolate);
        printf("Yay\n");
    }
    else {
        printf("isolate is null\n");
    }
    int data = *((int*)handle->data);
    printf("data: %d\n", data);
}

void testAsync(const FunctionCallbackInfo<Value>& args) {
    uv_thread_t id;
    int data = 10;
    uv_async_init(uv_default_loop(), &async, testCallback);
    uv_thread_create(&id, AsyncWork, &data);
}

void init(Handle<Object> target) {
  NODE_SET_METHOD(target, "testAsync", testAsync);
}

NODE_MODULE(MyCppModule, init);