idleMilliseconds method

@override int idleMilliseconds()

The Idle duration in milliseconds.

Throws UnsupportedError when isSupported is false. Implementations that are supported must not throw for ordinary OS failures — they report 0 (treat the user as active) so a transient failure cannot silently end monitoring.

Implementation

@override
int idleMilliseconds() {
  // Freed unconditionally: this runs on every poll for the lifetime of the
  // app, so a leaked 8 bytes per call is a leak that grows all day. `calloc`
  // rather than `malloc` so the tick field is zero even on the failure path,
  // where it is read but ignored.
  final info = calloc<_LastInputInfo>();
  try {
    info.ref.cbSize = sizeOf<_LastInputInfo>();
    return idleFromTicks(
      succeeded: _getLastInputInfo(info) != 0,
      tickCount64: _getTickCount64(),
      lastInputTick: info.ref.dwTime,
    );
  } finally {
    calloc.free(info);
  }
}