Function handleEAGAIN

Platforms/emscripten/streams.mjs:52–69

* Calls the callback and handle node EAGAIN errors.

(cb)

 * Calls the callback and handle node EAGAIN errors.
 */
function handleEAGAIN(cb) {
  while (true) {
    try {
      return cb();
    } catch (e) {
      if (e && e.code === "EAGAIN") {
        // Presumably this means we're in node and tried to read from/write to
        // an O_NONBLOCK file descriptor. Synchronously sleep for 10ms then try
        // again. In case for some reason we fail to sleep, propagate the error
        // (it will turn into an EOFError).
        if (syncSleep(10)) {
          continue;
        }
      }
      throw e;
    }
  }
}

function readWriteHelper(stream, cb, method) {
  let nbytes;