semaphore

package

v0.0.0-...-dcce029 Latest Latest Go to latest Published: Oct 26, 2021 License: MIT Imports: 1 Imported by: 0

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

Semaphore used to control access to a common resource by multiple goroutines.

func New(n int) *Semaphore

New returns a new counting semaphore of length `n`.

func (s *Semaphore) Len() int

Len returns the number of goroutines currently acquired the semaphore.

func (s *Semaphore) Signal()

Signal the semaphore. A random waiting goroutine will be waken up.

func (s *Semaphore) Wait()

Wait for the semaphore. Blocks until the resource is available.

func (s *Semaphore) Waiting() int

Waiting returs the number of waiting goroutines on the semaphore.