#ifndef _SOS_MODULE_FETCHER_H#define _SOS_MODULE_FETCHER_H#ifndef _MODULE_#include <sos_inttypes.h>#include <sos_sched.h>#include <malloc.h>#include <codemem.h>#include <sos_timer.h>#include <fntable.h>#endif#include <sos_cam.h>typedef struct {	codemem_t cm;	uint8_t   fetchtype;	uint8_t   status;} fetcher_cam_t;// use in fetcher_cam_t.fetchtype for patching SOS modulesenum {	FETCHTYPE_MODULE    = 0,	FETCHTYPE_DATA      = 1,};// use in fetcher_cam_t.status for fetching statusenum {	FETCHING_STARTED    = 0,	FETCHING_DONE       = 1,	FETCHING_QUEUED     = 2,};enum {	//! the size of fragment fetcher will fetch in at 1 time	FETCHER_FRAGMENT_SIZE   =  64L,};//! timersenum {	FETCHER_REQUEST_TID    = 1,	FETCHER_TRANSMIT_TID      = 2,	FETCHER_REQUEST_BACKOFF_SLOT  = 256L,  //!< 0.25 seconds	FETCHER_REQUEST_MAX_SLOT  = 8,	FETCHER_REQUEST_WATCHDOG  = 5 * 1024L, //!< 5 seconds.	FETCHER_REQUEST_MAX_RETX  = 3,};//! message typesenum {	MSG_FETCHER_REQUEST        =   (MOD_MSG_START + 0),	MSG_FETCHER_FRAGMENT       =   (MOD_MSG_START + 1),};typedef struct {	sos_cam_t key;	uint8_t bitmap_size;  //!< the size of the bitmap	uint8_t bitmap[];  //!< the bitmap that stores fetched fragments,	                   //! 0 means the fragment is fetched and 1 means the	                   //! fragment is missing.} PACK_STRUCTfetcher_bitmap_t;//! the packet that carries the fragmenttypedef struct {	uint16_t     frag_id;   //! fragment number	sos_cam_t    key;	uint8_t      fragment[FETCHER_FRAGMENT_SIZE];} PACK_STRUCTfetcher_fragment_t;typedef struct fetcher_state_str {	//! the location of fragment to be fetched	uint16_t                    src_addr;   	//! the module which requests the fetching	sos_pid_t                   requester;	//! number of retransmission of request	uint8_t                     retx;         	//! number of function poiinters in the module	//! this will be discovered during fetching	uint8_t                     num_funcs;	codemem_t                   cm;   	//! link list to store restart request	struct fetcher_state_str    *next;	//! bitmap for wanted fragments (Has to be the last element in the struct)	fetcher_bitmap_t            map;}fetcher_state_t;int8_t fetcher_init(void);/** * @brief request a particular module to be fetchered * * @param requester the id that is requesting the fetch * @param mod_id the id to be fetched * @param version the version of the module to be fetched * @param size the size of module to be fetched * @param src  the node id to be fetched from * */int8_t fetcher_request(sos_pid_t req_id, sos_cam_t key, uint16_t size, uint16_t src);int8_t fetcher_cancel(sos_pid_t req_id, sos_cam_t key);void fetcher_restart(fetcher_state_t *s, uint16_t src);void fetcher_commit(fetcher_state_t *s, bool commit);static inline bool is_fetcher_succeed(fetcher_state_t *s){	if(s->retx <= FETCHER_REQUEST_MAX_RETX) {		return true;	}	return false;}int8_t fetcher_init();#endif