lock

type Locker ¶

type Locker struct {
	// contains filtered or unexported fields
}

Locker guards one file against other goroutines with an RWMutex, and against other processes with a lock file. Both spin on a try-lock, so neither is fair: a writer cannot preempt a steady stream of readers, and every holder has to release quickly. That is the bargain the token cache is built on — a read is one field, a write is one token refresh.

func New(path string) Locker

func (l Locker) WithLock(ctx context.Context, fn func() error) error

func (l Locker) WithRLock(ctx context.Context, fn func() error) error