haiku/headers/private/kernel/pools.h

/* 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 */