| 0,0 → 1,80 |
|---|
| |
| typedef struct { |
| link_t link; |
| count_t busy; /**< Count of full slots in magazine */ |
| count_t size; /**< Number of slots in magazine */ |
| void *objs[]; /**< Slots in magazine */ |
| } slab_magazine_t; |
| |
| typedef struct { |
| slab_magazine_t *current; |
| slab_magazine_t *last; |
| SPINLOCK_DECLARE(lock); |
| } slab_mag_cache_t; |
| |
| typedef struct { |
| |
| link_t link; |
| |
| /* Configuration */ |
| /** Size of slab position - align_up(sizeof(obj)) */ |
| size_t size; |
| |
| // int (*constructor)(void *obj, int kmflag); |
| // int (*destructor)(void *obj); |
| |
| /** Flags changing behaviour of cache */ |
| int flags; |
| |
| /* Computed values */ |
| u32_t order; /**< Order of frames to be allocated */ |
| unsigned int objects; /**< Number of objects that fit in */ |
| |
| /* Statistics */ |
| atomic_t allocated_slabs; |
| atomic_t allocated_objs; |
| atomic_t cached_objs; |
| /** How many magazines in magazines list */ |
| atomic_t magazine_counter; |
| |
| /* Slabs */ |
| link_t full_slabs; /**< List of full slabs */ |
| link_t partial_slabs; /**< List of partial slabs */ |
| SPINLOCK_DECLARE(slablock); |
| /* Magazines */ |
| link_t magazines; /**< List o full magazines */ |
| SPINLOCK_DECLARE(maglock); |
| |
| /** CPU cache */ |
| slab_mag_cache_t *mag_cache; |
| } slab_cache_t; |
| |
| typedef struct { |
| link_t link; /**< List of full/partial slabs. */ |
| slab_cache_t *cache; /**< Pointer to parent cache. */ |
| count_t available; /**< Count of available items in this slab. */ |
| void *start; /**< Start address of first item. */ |
| void *nextavail; /**< The index of next available item. */ |
| } slab_t; |
| |
| #define SLAB_INSIDE_SIZE (4096 >> 3) |
| |
| /** Maximum wasted space we allow for cache */ |
| #define SLAB_MAX_BADNESS(cache) (((size_t) PAGE_SIZE << (cache)->order) >> 2) |
| |
| /** Do not use per-cpu cache */ |
| #define SLAB_CACHE_NOMAGAZINE 0x1 |
| /** Have control structure inside SLAB */ |
| #define SLAB_CACHE_SLINSIDE 0x2 |
| /** We add magazine cache later, if we have this flag */ |
| #define SLAB_CACHE_MAGDEFERRED (0x4 | SLAB_CACHE_NOMAGAZINE) |
| |
| |
| slab_cache_t * slab_cache_create( |
| size_t size, |
| size_t align, |
| int (*constructor)(void *obj, int kmflag), |
| int (*destructor)(void *obj), |
| int flags); |
| |
| void* __fastcall slab_alloc(slab_cache_t *cache, int flags); |