Function singleflightDoChan

coderd/x/chatd/configcache.go:118–132

singleflightDoChan wraps a singleflight group's DoChan method, allowing the caller to abandon the wait if their context is canceled while the shared fill continues running to completion. This separates two lifetimes: the fill runs under the server-scoped context, while each caller waits under its ow

(
	ctx context.Context,
	group *singleflight.Group[K, V],
	key K,
	fn func() (V, error),
)

// This separates two lifetimes: the fill runs under the server-scoped
// context, while each caller waits under its own request-scoped context.
func singleflightDoChan[K comparable, V any](
	ctx context.Context,
	group *singleflight.Group[K, V],
	key K,
	fn func() (V, error),
) (V, error) {
	ch := group.DoChan(key, fn)
	select {
	case <-ctx.Done():
		var zero V
		return zero, ctx.Err()
	case res := <-ch:
		return res.Val, res.Err
	}
}

func (c *chatConfigCache) EnabledProviders(ctx context.Context) ([]database.AIProvider, error) {
	if providers, ok := c.cachedProviders(); ok {