pool.h

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#ifndef __NVM_POOL__
#define __NVM_POOL__
 
#include "globals.h"
#include "free_slot_list.h"
#include "hashmap.h"
#include <libpmemobj.h>
 
#define POOL_ID_MALLOC_OBJ -1
 
#define POOL_SIZE (2 << 12) // Pool size is 4kB
 
uint32_t num_pools;
 
POBJ_LAYOUT_BEGIN(free_slot_layout);
POBJ_LAYOUT_ROOT(free_slot_layout, struct pool_free_slots_root);
POBJ_LAYOUT_TOID(free_slot_layout, struct pool_free_slot);
POBJ_LAYOUT_END(free_slot_layout);
 
typedef struct pool_free_slot {
    uint64_t start_b;
    uint64_t end_b;
    POBJ_TAILQ_ENTRY(struct pool_free_slot) fnd;
} pool_free_slot;
POBJ_TAILQ_HEAD(pool_free_slot_head, struct pool_free_slot);
typedef struct pool_free_slot_head pool_free_slot_head;
 
typedef struct pool_free_slots_root {
    struct pool_free_slot_head head;
} pool_free_slots_root;
 
typedef struct pool_kv_st {
    uint16_t key;
    uintptr_t pool_ptr;
} pool_kv;
 
typedef struct pool_free_slot_val_st {
    uint16_t key;
    PMEMobjpool* pool;
    pool_free_slot_head* head;
} pool_free_slot_val;
 
 
DECLARE_HASHMAP(pool_kv)
DECLARE_HASHMAP(pool_free_slot_val);
 
HASH_MAP(pool_kv) *pool_map;
HASH_MAP(pool_free_slot_val) *pool_free_slot_map;
// Initialise the metadata datastructures
int initialize_pool();
 
// Returns the memory mapped file pointer of the current pool
uintptr_t get_pool_from_poolid(uint64_t pool_id);
 
// Returns the current number of the pool
uint64_t get_current_poolid();
 
// Returns the offset of the pointer to the allocated space in NVRAM
uint64_t get_first_free_offset(size_t size);
 
// Frees the allocated spaces
void nvm_free(uint64_t pool_id, uint64_t offset, size_t size);
 
void create_new_pool(size_t size);
 
 
#endif // !__NVM_POOL__