kubernetes/vendor/golang.org/x/sync/singleflight/singleflight.go

var errGoexit …

type panicError …

// Error implements error interface.
func (p *panicError) Error() string { … }

func (p *panicError) Unwrap() error { … }

func newPanicError(v interface{ … }

type call …

type Group …

type Result …

// Do executes and returns the results of the given function, making
// sure that only one execution is in-flight for a given key at a
// time. If a duplicate comes in, the duplicate caller waits for the
// original to complete and receives the same results.
// The return value shared indicates whether v was given to multiple callers.
func (g *Group) Do(key string, fn func() (interface{ … }

// DoChan is like Do but returns a channel that will receive the
// results when they are ready.
//
// The returned channel will not be closed.
func (g *Group) DoChan(key string, fn func() (interface{ … }

// doCall handles the single call for a key.
func (g *Group) doCall(c *call, key string, fn func() (interface{ … }

// Forget tells the singleflight to forget about a key.  Future calls
// to Do for this key will call the function rather than waiting for
// an earlier call to complete.
func (g *Group) Forget(key string) { … }