dart:io

sleep function

void sleep (Duration duration)

Sleep for the duration specified in duration.

Use this with care, as no asynchronous operations can be processed in a isolate while it is blocked in a sleep call.

Implementation

void sleep(Duration duration) {
  int milliseconds = duration.inMilliseconds;
  if (milliseconds < 0) {
    throw new ArgumentError("sleep: duration cannot be negative");
  }
  if (!_EmbedderConfig._maySleep) {
    throw new UnsupportedError(
        "This embedder disallows calling dart:io's sleep()");
  }
  _ProcessUtils._sleep(milliseconds);
}