82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
|
#ifndef JEMALLOC_INTERNAL_BIN_H
|
||
|
|
#define JEMALLOC_INTERNAL_BIN_H
|
||
|
|
|
||
|
|
#include "jemalloc/internal/extent_types.h"
|
||
|
|
#include "jemalloc/internal/extent_structs.h"
|
||
|
|
#include "jemalloc/internal/mutex.h"
|
||
|
|
#include "jemalloc/internal/stats.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A bin contains a set of extents that are currently being used for slab
|
||
|
|
* allocations.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Read-only information associated with each element of arena_t's bins array
|
||
|
|
* is stored separately, partly to reduce memory usage (only one copy, rather
|
||
|
|
* than one per arena), but mainly to avoid false cacheline sharing.
|
||
|
|
*
|
||
|
|
* Each slab has the following layout:
|
||
|
|
*
|
||
|
|
* /--------------------\
|
||
|
|
* | region 0 |
|
||
|
|
* |--------------------|
|
||
|
|
* | region 1 |
|
||
|
|
* |--------------------|
|
||
|
|
* | ... |
|
||
|
|
* | ... |
|
||
|
|
* | ... |
|
||
|
|
* |--------------------|
|
||
|
|
* | region nregs-1 |
|
||
|
|
* \--------------------/
|
||
|
|
*/
|
||
|
|
typedef struct bin_info_s bin_info_t;
|
||
|
|
struct bin_info_s {
|
||
|
|
/* Size of regions in a slab for this bin's size class. */
|
||
|
|
size_t reg_size;
|
||
|
|
|
||
|
|
/* Total size of a slab for this bin's size class. */
|
||
|
|
size_t slab_size;
|
||
|
|
|
||
|
|
/* Total number of regions in a slab for this bin's size class. */
|
||
|
|
uint32_t nregs;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Metadata used to manipulate bitmaps for slabs associated with this
|
||
|
|
* bin.
|
||
|
|
*/
|
||
|
|
bitmap_info_t bitmap_info;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern const bin_info_t bin_infos[NBINS];
|
||
|
|
|
||
|
|
|
||
|
|
typedef struct bin_s bin_t;
|
||
|
|
struct bin_s {
|
||
|
|
/* All operations on bin_t fields require lock ownership. */
|
||
|
|
malloc_mutex_t lock;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Current slab being used to service allocations of this bin's size
|
||
|
|
* class. slabcur is independent of slabs_{nonfull,full}; whenever
|
||
|
|
* slabcur is reassigned, the previous slab must be deallocated or
|
||
|
|
* inserted into slabs_{nonfull,full}.
|
||
|
|
*/
|
||
|
|
extent_t *slabcur;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Heap of non-full slabs. This heap is used to assure that new
|
||
|
|
* allocations come from the non-full slab that is oldest/lowest in
|
||
|
|
* memory.
|
||
|
|
*/
|
||
|
|
extent_heap_t slabs_nonfull;
|
||
|
|
|
||
|
|
/* List used to track full slabs. */
|
||
|
|
extent_list_t slabs_full;
|
||
|
|
|
||
|
|
/* Bin statistics. */
|
||
|
|
malloc_bin_stats_t stats;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif /* JEMALLOC_INTERNAL_BIN_H */
|