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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_OS_BLUESTORE_STUPIDALLOCATOR_H
#define CEPH_OS_BLUESTORE_STUPIDALLOCATOR_H
#include <mutex>
#include "Allocator.h"
#include "include/btree_map.h"
#include "include/interval_set.h"
#include "os/bluestore/bluestore_types.h"
#include "include/mempool.h"
#include "common/ceph_mutex.h"
class StupidAllocator : public Allocator {
CephContext* cct;
ceph::mutex lock = ceph::make_mutex("StupidAllocator::lock");
int64_t num_free; ///< total bytes in freelist
int64_t block_size;
typedef mempool::bluestore_alloc::pool_allocator<
pair<const uint64_t,uint64_t>> allocator_t;
typedef btree::btree_map<uint64_t,uint64_t,std::less<uint64_t>,allocator_t> interval_set_map_t;
typedef interval_set<uint64_t,interval_set_map_t> interval_set_t;
std::vector<interval_set_t> free; ///< leading-edge copy
uint64_t last_alloc;
unsigned _choose_bin(uint64_t len);
void _insert_free(uint64_t offset, uint64_t len);
uint64_t _aligned_len(
interval_set_t::iterator p,
uint64_t alloc_unit);
public:
StupidAllocator(CephContext* cct, const std::string& name, int64_t block_size);
~StupidAllocator() override;
int64_t allocate(
uint64_t want_size, uint64_t alloc_unit, uint64_t max_alloc_size,
int64_t hint, PExtentVector *extents) override;
int64_t allocate_int(
uint64_t want_size, uint64_t alloc_unit, int64_t hint,
uint64_t *offset, uint32_t *length);
void release(
const interval_set<uint64_t>& release_set) override;
uint64_t get_free() override;
double get_fragmentation() override;
void dump() override;
void dump(std::function<void(uint64_t offset, uint64_t length)> notify) override;
void init_add_free(uint64_t offset, uint64_t length) override;
void init_rm_free(uint64_t offset, uint64_t length) override;
void shutdown() override;
};
#endif
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