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/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
#if !defined(_slabs_h_)
#define _slabs_h_
/* slabs memory allocation */
/** Init the subsystem. 1st argument is the limit on no. of bytes to allocate,
0 if no limit. 2nd argument is the growth factor; each slab will use a chunk
size equal to the previous slab's chunk size times this factor.
3rd argument specifies if the slab allocator should allocate all memory
up front (if true), or allocate memory in chunks as it is needed (if false)
*/
void slabs_init(const size_t limit, const double factor, const bool prealloc);
/**
* Given object size, return id to use when allocating/freeing memory for object
* 0 means error: can't store such a large object
*/
unsigned int slabs_clsid(const size_t size);
unsigned int slabs_chunksize(const unsigned int clsid);
/** Allocate object of given length. 0 on error */ /*@null@*/
void *do_slabs_alloc(const size_t size, unsigned int id);
/** Free previously allocated object */
void do_slabs_free(void *ptr, size_t size, unsigned int id);
/** Fill buffer with stats */ /*@null@*/
char* do_slabs_stats(int *buflen);
/* Request some slab be moved between classes
1 = success
0 = fail
-1 = tried. busy. send again shortly. */
int do_slabs_reassign(unsigned char srcid, unsigned char dstid);
void slabs_add_hit(void *it, int unique);
void slabs_add_eviction(unsigned int clsid);
/* Find the worst performed slab class to free one slab from it and
assign it to the best performed slab class. */
void do_slabs_rebalance();
/* 0 to turn off rebalance_interval; otherwise, this number is in seconds.
* These two functions are actually implemented in items.c.
*/
void slabs_set_rebalance_interval(int interval);
int slabs_get_rebalance_interval();
#endif /* #if !defined(_slabs_h_) */
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