Xprize update

Former-commit-id: d38919a897961e4d40da3b844057c3fb94fdb6d7

pkg/obiutils/counter.go

@@ -0,0 +1,42 @@
+package obiutils
+
+import "sync"
+
+type Counter struct {
+	Inc   func() int
+	Dec   func() int
+	Value func() int
+}
+
+func NewCounter(initial ...int) *Counter {
+	value := 0
+	lock := sync.Mutex{}
+
+	if len(initial) > 0 {
+		value = initial[0]
+	}
+
+	c := Counter{
+		Inc: func() int {
+			lock.Lock()
+			defer lock.Unlock()
+			value++
+			return value
+		},
+
+		Dec: func() int {
+			lock.Lock()
+			defer lock.Unlock()
+			value--
+			return value
+		},
+
+		Value: func() int {
+			lock.Lock()
+			defer lock.Unlock()
+			return value
+		},
+	}
+
+	return &c
+}

pkg/obiutils/strings.go

@@ -0,0 +1,12 @@
+package obiutils
+
+import "unsafe"
+
+func UnsafeStringFreomBytes(data []byte) string {
+	if len(data) > 0 {
+		s := unsafe.String(unsafe.SliceData(data), len(data))
+		return s
+	}
+
+	return ""
+}