util/levelmu is no longer in use

diff --git a/util/levelmu/levelmu.go b/util/levelmu/levelmu.go
deleted file mode 100644 (file)
index 5970d72..0000000
--- a/util/levelmu/levelmu.go
+++ /dev/null
@@ -1,39 +0,0 @@
-package levelmu
-
-import (
-       "sync"
-)
-
-type LevelMutex struct {
-       mus []sync.Mutex
-       // Protected by the very last mutex.
-       lastLevel int
-}
-
-func (lm *LevelMutex) Init(levels int) {
-       if lm.mus != nil {
-               panic("level mutex already initialized")
-       }
-       lm.mus = make([]sync.Mutex, levels)
-}
-
-func (lm *LevelMutex) Lock() {
-       lm.LevelLock(0)
-}
-
-func (lm *LevelMutex) Unlock() {
-       stopLevel := lm.lastLevel
-       for i := len(lm.mus) - 1; i >= stopLevel; i-- {
-               lm.mus[i].Unlock()
-       }
-}
-
-func (lm *LevelMutex) LevelLock(level int) {
-       if level >= len(lm.mus) {
-               panic("lock level exceeds configured level count")
-       }
-       for l := level; l < len(lm.mus); l++ {
-               lm.mus[l].Lock()
-       }
-       lm.lastLevel = level
-}