page_pub.h

来自「abstract rtos」· C头文件 代码 · 共 63 行

#ifdef __cplusplus
extern "C"{
#endif 

#ifndef __INC_PAGE_PUB_H__
#define __INC_PAGE_PUB_H__


#define PAGE_DEFAULT_BLK_SIZE 4096  
#define PAGE_DEFAULT_BLK_NUM  250    

#define aos_page_opt_set( page, val )   do{ (page)->opt = (val); }while(0)
#define aos_page_opt_get( page, pval )  do{ *(U32*)(pval) = (page)->opt; }while(0)
#define aos_page_sum_set( page, val )   do{ (page)->sum = (val); }while(0)
#define aos_page_sum_get( page, pval )  do{ *(U32*)(pval) = (page)->sum; }while(0)
#define aos_page_len( page )            ( (page)->page_size )
#define aos_page_read_reset( page )     do{ (page)->read_ptr = 0; }while(0)
#define aos_page_write_reset( page )    do{ (page)->write_ptr = 0; }while(0)
#define aos_page_size_reset(page)       do{ (page)->page_size=0; }while(0)
#define aos_page_read_end(page)         ( (page)->read_ptr >= (page)->page_size )





typedef struct
{
    U32 magic_num;
    struct msg_blk mb;
    U32 mpe;
    U32 opt;
    U32 sum;
    U32 page_size;
    U32 blk_size;   
    U32 max_blk_num;
    U32 blk_num;    
    U32 read_ptr;   
    U32 write_ptr;  
    U8  *ext_mem_ptr; 
    U32  ext_mem_size; 
    U8  *blk_ptr[1];  
}page_t;






page_t *aos_page_new( MPE mpe );
VOID aos_page_delete( page_t *page );
U32 aos_page_read( page_t *page, U8 *buf, U32 len );
U32 aos_page_read_off( page_t *page, U32 off, U8 *buf, U32 len );
U32 aos_page_write( page_t *page, U8 *buf, U32 len );
U32 aos_page_write_off( page_t *page, U32 off, U8 *buf, U32 len );
U32 aos_page_append( page_t *page, U8 *ptr, U32 size );

#endif


#ifdef __cplusplus
}
#endif