haiku/headers/private/kernel/pools.h

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/* pools.h
* simple fixed size block allocator
*/
#ifndef _KERNEL_POOLS_H
#define _KERNEL_POOLS_H
#include <ktypes.h>
#include <lock.h>
typedef struct pool_ctl pool_ctl;
struct pool_mem {
struct pool_mem *next;
region_id aid;
char *base_addr;
size_t mem_size;
char *ptr;
size_t avail;
benaphore lock;
};
#define FREE_MAGIC 'BORK'
struct free_blk {
uint32 magic;
struct free_blk *next;
uint32 magic_check;
};
#define POOL_USES_BENAPHORES 0
#define POOL_DEBUG_NAME_SZ 32
struct pool_ctl {
struct pool_mem *list;
struct free_blk *freelist;
size_t alloc_size;
size_t block_size;
#if POOL_USES_BENAPHORES
benaphore lock;
#else
rw_lock lock;
#endif
int debug : 1;
char name[POOL_DEBUG_NAME_SZ];
};
int32 pool_init(pool_ctl **p, size_t sz);
void *pool_get(pool_ctl *p);
void pool_put(pool_ctl *p, void *ptr);
void pool_destroy(pool_ctl *p);
void pool_debug(struct pool_ctl *p, char *name);
void pool_debug_walk(pool_ctl *p);
#endif /* _KERNEL_POOLS_H */