把JS 函数放到 Rust 中执行 ​

use std::thread;

use napi::{
  bindgen_prelude::*,
  threadsafe_function::{ErrorStrategy, ThreadsafeFunction, ThreadsafeFunctionCallMode},
};

// 强制指定参数类型
#[napi(ts_args_type = "callback: (err: null | Error, result: number) => void")]
pub fn call_threadsafe_function(callback: JsFunction) -> Result<()> {
  let tsfn: ThreadsafeFunction<u32, ErrorStrategy::CalleeHandled> = callback
    // ctx.value 即 Rust 调用 JS 函数时传递的入参，封装成 Vec 传递给 JS 函数
    .create_threadsafe_function(0, |ctx| ctx.env.create_uint32(ctx.value).map(|v| vec![v]))?;
  for n in 0..100 {
    let tsfn = tsfn.clone();
    thread::spawn(move || {
      // 通过 tsfn.call 来调用 JS 函数
      tsfn.call(Ok(n), ThreadsafeFunctionCallMode::Blocking);
    });
  }
  Ok(())
}

use std::thread;

use napi::{
  bindgen_prelude::*,
  threadsafe_function::{ErrorStrategy, ThreadsafeFunction, ThreadsafeFunctionCallMode},
};

// 强制指定参数类型
#[napi(ts_args_type = "callback: (err: null | Error, result: number) => void")]
pub fn call_threadsafe_function(callback: JsFunction) -> Result<()> {
  let tsfn: ThreadsafeFunction<u32, ErrorStrategy::CalleeHandled> = callback
    // ctx.value 即 Rust 调用 JS 函数时传递的入参，封装成 Vec 传递给 JS 函数
    .create_threadsafe_function(0, |ctx| ctx.env.create_uint32(ctx.value).map(|v| vec![v]))?;
  for n in 0..100 {
    let tsfn = tsfn.clone();
    thread::spawn(move || {
      // 通过 tsfn.call 来调用 JS 函数
      tsfn.call(Ok(n), ThreadsafeFunctionCallMode::Blocking);
    });
  }
  Ok(())
}