mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-26 21:56:39 +00:00
41 lines
822 B
Go
41 lines
822 B
Go
|
package mutexes
|
||
|
|
|
||
|
|
// pool is a very simply memory pool.
|
||
|
|
type pool struct {
|
||
|
|
current []interface{}
|
||
|
|
victim []interface{}
|
||
|
|
alloc func() interface{}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Acquire will returns a sync.RWMutex from pool (or alloc new).
|
||
|
|
func (p *pool) Acquire() interface{} {
|
||
|
|
// First try the current queue
|
||
|
|
if l := len(p.current) - 1; l >= 0 {
|
||
|
|
v := p.current[l]
|
||
|
|
p.current = p.current[:l]
|
||
|
|
return v
|
||
|
|
}
|
||
|
|
|
||
|
|
// Next try the victim queue.
|
||
|
|
if l := len(p.victim) - 1; l >= 0 {
|
||
|
|
v := p.victim[l]
|
||
|
|
p.victim = p.victim[:l]
|
||
|
|
return v
|
||
|
|
}
|
||
|
|
|
||
|
|
// Lastly, alloc new.
|
||
|
|
return p.alloc()
|
||
|
|
}
|
||
|
|
|
||
|
|
// Release places a sync.RWMutex back in the pool.
|
||
|
|
func (p *pool) Release(v interface{}) {
|
||
|
|
p.current = append(p.current, v)
|
||
|
|
}
|
||
|
|
|
||
|
|
// GC will clear out unused entries from the pool.
|
||
|
|
func (p *pool) GC() {
|
||
|
|
current := p.current
|
||
|
|
p.current = nil
|
||
|
|
p.victim = current
|
||
|
|
}
|