Author: Tylor Arndt 0.95 RC - API may change. (Bug reports and PRs are welcome)
Semaphore variants provided are:
- Binary semaphores
- Counting semaphores
- Counting semaphores with timeout support
- Context support was recently added
All written in pure Go.
Previously there was a sync.Cond based implemenation that was removed with Go runtime performance improvements rendered it overly complex for a small performance gain over the channel-based implemenation.
In sema.go you will find the three default constructors and related core interfaces.
func NewSemaphore() Semaphore {...}
func NewCountingSema(count uint) CountingSema {...}
func NewTimeoutSema(count uint, defaultTimeout time.Duration) TimeoutCountingSema {...}The Semaphore interface is extended from being binary to counting by CountingSema which in turn is enhanced with time-out support in its TimeoutCountingSema variant.