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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2017 Red Hat, Inc.
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef CEPH_COUNTER_H
#define CEPH_COUNTER_H
#include <atomic>
template <typename T>
class Counter {
public:
Counter() {
_count()++;
_increments()++;
}
Counter(const Counter &rhs) {
_count()++;
_increments()++;
}
Counter(Counter &&rhs) {}
~Counter() {
_count()--;
}
static uint64_t count() {
return _count();
}
static uint64_t increments() {
return _increments();
}
static uint64_t decrements() {
return increments()-count();
}
private:
static std::atomic<uint64_t> &_count() {
static std::atomic<uint64_t> c;
return c;
}
static std::atomic<uint64_t> &_increments() {
static std::atomic<uint64_t> i;
return i;
}
};
#endif
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