uffs_mem.h

一个NAND FLASH文件系统

#ifndef UFFS_MEM_H
#define UFFS_MEM_H

#include "uffs/uffs_device.h"

#ifdef __cplusplus
extern "C"{
#endif

#define HEAP_HASH_BIT	6							/* hash table bit */
#define HEAP_HASH_SIZE (1 << (HEAP_HASH_BIT - 1))	/* hash table size */
#define HEAP_HASH_MASK	(HEAP_HASH_SIZE - 1)		/* hash table mask */
#define GET_HASH_INDEX(p) ((((u32)(p)) >> 2) & HEAP_HASH_MASK)

/* memory alloc node  */
typedef struct _heap_mm_node{
	int task_id;					/* who alloc this block? it's the caller's task id */
	struct _heap_mm_node * next;	/* point to next node */
	void *p;						/* point to allocated block */
	int size;						/* block size */
} HEAP_MM;

typedef HEAP_MM* HASHTBL;


/** uffs native memory allocator */
typedef struct uffs_memAllocatorSt {
	HASHTBL tbl[HEAP_HASH_SIZE];
	void * (*malloc)(struct uffs_memAllocatorSt *mem, unsigned int size);
	void * (*realloc)(struct uffs_memAllocatorSt *mem, void *p, unsigned int size);
	void * (*calloc)(struct uffs_memAllocatorSt *mem, unsigned int num, unsigned int size);
	void (*free)(struct uffs_memAllocatorSt *mem, void *p);
	int count;
	int maxused;
} uffs_memAllocator;

/** \note: uffs_InitHeapMemory should be called before using native memory allocator on each device */
void uffs_InitHeapMemory(void *addr, int size);

URET uffs_initNativeMemAllocator(uffs_Device *dev);
int uffs_releaseNativeMemAllocator(uffs_Device *dev);

#ifdef __cplusplus
}
#endif


#endif