startPerformance method

Future<CockpitPerformanceCaptureSession> startPerformance(CockpitPerformanceCaptureRequest request)

Implementation

Future<CockpitPerformanceCaptureSession> startPerformance(
  CockpitPerformanceCaptureRequest request,
) async {
  if (_performanceStarting ||
      _recordingStarting ||
      _activePerformanceSession != null ||
      performanceCollector.isRunning) {
    throw StateError('A performance capture is already active.');
  }
  if (_activeRecordingSession != null) {
    throw StateError(
      'Performance capture cannot overlap a screen recording.',
    );
  }
  _performanceStarting = true;
  try {
    performanceCollector.start(mode: request.mode);
    final startedAt = performanceCollector.startedAt;
    if (startedAt == null) {
      performanceCollector.dispose();
      throw StateError('Performance capture did not report a start time.');
    }
    final session = CockpitPerformanceCaptureSession(
      request: request,
      startedAt: startedAt,
      buildMode: performanceCollector.buildMode,
    );
    _activePerformanceSession = session;
    return session;
  } finally {
    _performanceStarting = false;
  }
}