balloc.h

来自「Intel x86处理器的汇编器」· C头文件 代码 · 共 66 行

#ifndef _BALLOC_H_
#define _BALLOC_H_

typedef struct mem_link_struct {
	unsigned int size;
	void *head_ptr;
	void *tail_ptr;

	unsigned char used;		/* is used ? */	
	struct mem_link_struct *next, *prev;
} mem_link_t;


typedef struct alloc_heap_struct {
	unsigned int total_size;
	unsigned int free_size;
	mem_link_t *free_link;
	mem_link_t *used_link;
	void *heap;
} alloc_heap_t;


typedef unsigned int memlink_size_t;

/* free-heap-link total value type, it's a 32-bit type */
typedef unsigned int free_link_size_t;

/* used-heap-link total value type, it's a 32-bit type */
typedef unsigned int used_link_size_t;

/* default user-program buffer pool 64K */
#define POOLSIZE	65536

#define LINKSIZE	256
#define FREELINKSIZE	256
#define USEDLINKSIZE	256


#define EOK		0
#define EINIT		-1
#define EFULLNESS	-2
#define ENOMEM		-3
#define EERROR		-4

/*

char *e_msg[] = {
	"initialize error",
	"the buffer pool fullness",
	"the buffer pool not enough",

	0
};


*/

int init_bheap(unsigned int size, void *ptr);
void *balloc(unsigned int size);
int bfree(void *ptr);


#endif