src/ceph/src/os/bluestore/StupidAllocator.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef CEPH_OS_BLUESTORE_STUPIDALLOCATOR_H
   5 #define CEPH_OS_BLUESTORE_STUPIDALLOCATOR_H
   6
   7 #include <mutex>
   8
   9 #include "Allocator.h"
  10 #include "include/btree_interval_set.h"
  11 #include "os/bluestore/bluestore_types.h"
  12 #include "include/mempool.h"
  13
  14 class StupidAllocator : public Allocator {
  15   CephContext* cct;
  16   std::mutex lock;
  17
  18   int64_t num_free;     ///< total bytes in freelist
  19   int64_t num_reserved; ///< reserved bytes
  20
  21   typedef mempool::bluestore_alloc::pool_allocator<
  22     pair<const uint64_t,uint64_t>> allocator;
  23   std::vector<btree_interval_set<uint64_t,allocator>> free;  ///< leading-edge copy
  24
  25   uint64_t last_alloc;
  26
  27   unsigned _choose_bin(uint64_t len);
  28   void _insert_free(uint64_t offset, uint64_t len);
  29
  30   uint64_t _aligned_len(
  31     btree_interval_set<uint64_t,allocator>::iterator p,
  32     uint64_t alloc_unit);
  33
  34 public:
  35   StupidAllocator(CephContext* cct);
  36   ~StupidAllocator() override;
  37
  38   int reserve(uint64_t need) override;
  39   void unreserve(uint64_t unused) override;
  40
  41   int64_t allocate(
  42     uint64_t want_size, uint64_t alloc_unit, uint64_t max_alloc_size,
  43     int64_t hint, mempool::bluestore_alloc::vector<AllocExtent> *extents) override;
  44
  45   int64_t allocate_int(
  46     uint64_t want_size, uint64_t alloc_unit, int64_t hint,
  47     uint64_t *offset, uint32_t *length);
  48
  49   void release(
  50     uint64_t offset, uint64_t length) override;
  51
  52   uint64_t get_free() override;
  53
  54   void dump() override;
  55
  56   void init_add_free(uint64_t offset, uint64_t length) override;
  57   void init_rm_free(uint64_t offset, uint64_t length) override;
  58
  59   void shutdown() override;
  60 };
  61
  62 #endif