1 files changed, 53 insertions, 0 deletions
diff --git a/utils.go b/utils.go
new file mode 100644
index 0000000..9d1408e
--- /dev/null
+++ b/utils.go
@@ -0,0 +1,53 @@
+package cache
+
+import (
+	"hash/fnv"
+	"math"
+	"time"
+)
+
+type pauseTimer struct {
+	*time.Ticker
+	duration time.Duration
+}
+
+func newPauseTimer(d time.Duration) *pauseTimer {
+	ret := &pauseTimer{duration: d}
+	if d != 0 {
+		ret.Ticker = time.NewTicker(d)
+	} else {
+		ret.Ticker = time.NewTicker(math.MaxInt64)
+		ret.Reset(0)
+	}
+	return ret
+}
+
+func (t *pauseTimer) Reset(d time.Duration) {
+	t.duration = d
+	if t.duration == 0 {
+		t.Stop()
+	} else {
+		t.Ticker.Reset(d)
+	}
+}
+
+func (t *pauseTimer) Resume() {
+	t.Reset(t.GetDuration())
+}
+
+func (t *pauseTimer) GetDuration() time.Duration {
+	return t.duration
+}
+
+func zero[T any]() T {
+	var ret T
+	return ret
+}
+
+func hash(data []byte) uint64 {
+	hasher := fnv.New64()
+	if _, err := hasher.Write(data); err != nil {
+		panic(err)
+	}
+	return hasher.Sum64()
+}