mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-01 06:50:00 +00:00
7c0bbd3f6a
* update go-store to v2.0.6: closer callbacks are now only ever called at most once Signed-off-by: kim <grufwub@gmail.com> * bump go-store => v2.0.7, go-mutexes => v1.1.4 Signed-off-by: kim <grufwub@gmail.com> Signed-off-by: kim <grufwub@gmail.com>
40 lines
784 B
Go
40 lines
784 B
Go
package mutexes
|
|
|
|
// pool is a very simply memory pool.
|
|
type pool struct {
|
|
current []*rwmutex
|
|
victim []*rwmutex
|
|
}
|
|
|
|
// Acquire will returns a rwmutex from pool (or alloc new).
|
|
func (p *pool) Acquire() *rwmutex {
|
|
// First try the current queue
|
|
if l := len(p.current) - 1; l >= 0 {
|
|
mu := p.current[l]
|
|
p.current = p.current[:l]
|
|
return mu
|
|
}
|
|
|
|
// Next try the victim queue.
|
|
if l := len(p.victim) - 1; l >= 0 {
|
|
mu := p.victim[l]
|
|
p.victim = p.victim[:l]
|
|
return mu
|
|
}
|
|
|
|
// Lastly, alloc new.
|
|
return &rwmutex{}
|
|
}
|
|
|
|
// Release places a sync.RWMutex back in the pool.
|
|
func (p *pool) Release(mu *rwmutex) {
|
|
p.current = append(p.current, mu)
|
|
}
|
|
|
|
// GC will clear out unused entries from the pool.
|
|
func (p *pool) GC() {
|
|
current := p.current
|
|
p.current = nil
|
|
p.victim = current
|
|
}
|