undefined;
    this.size = 0;
    this.callback = callback;
    this.buffers = null;
    this.buffer = null;
    this.pos = 0;
    this.encoding = encoding;
    this.err = null;
    this.signal = undefined;
  }

  read() {
    let buffer;
    let offset;
    let length;

    if (this.signal?.aborted) {
      return this.close(new AbortError());
    }
    if (this.size === 0) {
      buffer = Buffer.allocUnsafeSlow(kReadFileUnknownBufferLength);
      offset = 0;
      length = kReadFileUnknownBufferLength;
      this.buffer = buffer;
    } else {
      buffer = this.buffer;
      offset = this.pos;
      length = MathMin(kReadFileBufferLength, this.size - this.pos);
    }

    const req = new FSReqCallback();
    req.oncomplete = readFileAfterRead;
    req.context = this;

    read(this.fd, buffer, offset, length, -1, req);
  }

  close(err) {
    if (this.isUserFd) {
      process.nextTick(function tick(context) {
        ReflectApply(readFileAfterClose, { context }, [null]);
      }, this);
      return;
    }

    const req = new FSReqCallback();
    req.oncomplete = readFileAfterClose;
    req.context = this;
    this.err = err;

    close(this.fd, req);
  }
}

module.exports = ReadFileContext;