diff options
Diffstat (limited to 'vendor/github.com/jtolds/gls/id_pool.go')
-rw-r--r-- | vendor/github.com/jtolds/gls/id_pool.go | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/vendor/github.com/jtolds/gls/id_pool.go b/vendor/github.com/jtolds/gls/id_pool.go new file mode 100644 index 0000000..b7974ae --- /dev/null +++ b/vendor/github.com/jtolds/gls/id_pool.go @@ -0,0 +1,34 @@ +package gls + +// though this could probably be better at keeping ids smaller, the goal of +// this class is to keep a registry of the smallest unique integer ids +// per-process possible + +import ( + "sync" +) + +type idPool struct { + mtx sync.Mutex + released []uint + max_id uint +} + +func (p *idPool) Acquire() (id uint) { + p.mtx.Lock() + defer p.mtx.Unlock() + if len(p.released) > 0 { + id = p.released[len(p.released)-1] + p.released = p.released[:len(p.released)-1] + return id + } + id = p.max_id + p.max_id++ + return id +} + +func (p *idPool) Release(id uint) { + p.mtx.Lock() + defer p.mtx.Unlock() + p.released = append(p.released, id) +} |