README
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semaphore
This implements a semaphore in Go. Use this to manage the maximum amount of concurrency you want.
Usage
To create a new Semaphore with 5 workers:
import "github.com/kevinburke/semaphore"
...
sem := semaphore.New(5) // new semaphore with 5 permits
Acquire one of the workers:
sem.Acquire() // one
// Acquire with a timeout, or cancelable context:
sem.AcquireContext(context.TODO())
Once you're done with the semaphore:
sem.Release() // Release one worker
sem.Drain() // Release them all
Complete documentation
Documentation
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Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Semaphore ¶
type Semaphore struct {
// contains filtered or unexported fields
}
Semaphore allows you to control the number of in-flight requests of a given service.
func (*Semaphore) Acquire ¶
func (s *Semaphore) Acquire()
Acquire blocks until a worker becomes available.
func (*Semaphore) AcquireContext ¶
AcquireContext attempts to acquire a resource. AcquireContext returns false if we were unable to acquire a resource before the Context timed out or was canceled.
func (*Semaphore) Drain ¶
func (s *Semaphore) Drain()
Drain releases all resources that have been acquired by this semaphore.
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