+
+ const Statistic &operator+=(const unsigned &V) {
+ sys::AtomicAdd(&Value, V);
+ return init();
+ }
+
+ const Statistic &operator-=(const unsigned &V) {
+ sys::AtomicAdd(&Value, -V);
+ return init();
+ }
+
+ const Statistic &operator*=(const unsigned &V) {
+ sys::AtomicMul(&Value, V);
+ return init();
+ }
+
+ const Statistic &operator/=(const unsigned &V) {
+ sys::AtomicDiv(&Value, V);
+ return init();
+ }
+
+protected:
+ Statistic &init() {
+ bool tmp = Initialized;
+ sys::MemoryFence();
+ if (!tmp) RegisterStatistic();
+ return *this;
+ }
+ void RegisterStatistic();