ceph/src/os/bluestore/bluestore_common.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2014 Red Hat
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #ifndef CEPH_OSD_BLUESTORE_COMMON_H
  16 #define CEPH_OSD_BLUESTORE_COMMON_H
  17
  18 #include "include/intarith.h"
  19 #include "include/ceph_assert.h"
  20
  21 template <class Bitset, class Func>
  22 void apply_for_bitset_range(uint64_t off,
  23   uint64_t len,
  24   uint64_t granularity,
  25   Bitset &bitset,
  26   Func f) {
  27   auto end = round_up_to(off + len, granularity) / granularity;
  28   ceph_assert(end <= bitset.size());
  29   uint64_t pos = off / granularity;
  30   while (pos < end) {
  31     f(pos, bitset);
  32     pos++;
  33   }
  34 }
  35
  36 #endif