Method waitForResolvedAddrs

clientconn.go:759–774

waitForResolvedAddrs blocks until the resolver provides addresses or the context expires, whichever happens first. Error is nil unless the context expires first; otherwise returns a status error based on the context. The returned boolean indicates whether it did block or not. If the resolution has

(ctx context.Context)

// resolution has succeeded or return false along with error if resolution has
// failed.
func (cc *ClientConn) waitForResolvedAddrs(ctx context.Context) (bool, error) {
	// This is on the RPC path, so we use a fast path to avoid the
	// more-expensive "select" below after the resolver has returned once.
	if cc.firstResolveEvent.HasFired() {
		return false, nil
	}
	internal.NewStreamWaitingForResolver()
	select {
	case <-cc.firstResolveEvent.Done():
		return true, nil
	case <-ctx.Done():
		return false, status.FromContextError(ctx.Err()).Err()
	case <-cc.ctx.Done():
		return false, ErrClientConnClosing
	}
}

var emptyServiceConfig *ServiceConfig