ul_fd4indir.h

一个linux下rs485驱动程序的源代码

#ifndef _UL_FD_H
#define _UL_FD_H

#define WITH_UL_FD_INDIRECT

#include <stdint.h>
#include <ul_lib/ul_fddir.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifndef UL_OFFSETOF
/* offset of structure field */
#define UL_OFFSETOF(_type,_member) \
                ((int)&(((_type*)0)->_member))
#endif /*UL_OFFSET*/

#ifndef UL_CONTAINEROF
#ifdef  __GNUC__
#define UL_CONTAINEROF(_ptr, _type, _member) ({ \
        const typeof( ((_type *)0)->_member ) *__mptr = (_ptr); \
        (_type *)( (char *)__mptr - UL_OFFSETOF(_type,_member) );})
#else /*!__GNUC__*/
#define UL_CONTAINEROF(_ptr, _type, _member) \
        ((_type *)( (char *)_ptr - UL_OFFSETOF(_type,_member)))
#endif /*__GNUC__*/
#endif /*UL_CONTAINEROF*/


typedef struct ul_fd_context_t *ul_fd_t;
#define UL_FD_INVALID (NULL)

typedef struct ul_fd_ops_t {
  const char *ops_name;
  int (*ulop_namematch)(const char *dev_name);
  ul_fd_t (*ulop_open)(const char *dev_name, const char *options);
  int (*ulop_close)(ul_fd_t ul_fd);
  int (*ulop_drv_version)(ul_fd_t ul_fd);
  ssize_t (*ulop_read)(ul_fd_t ul_fd, void *buffer, size_t size);
  ssize_t (*ulop_write)(ul_fd_t ul_fd, const void *buffer, size_t size);
  int (*ulop_newmsg)(ul_fd_t ul_fd,const ul_msginfo *msginfo);
  int (*ulop_tailmsg)(ul_fd_t ul_fd,const ul_msginfo *msginfo);
  int (*ulop_freemsg)(ul_fd_t ul_fd);
  int (*ulop_acceptmsg)(ul_fd_t ul_fd,ul_msginfo *msginfo);
  int (*ulop_actailmsg)(ul_fd_t ul_fd,ul_msginfo *msginfo);
  int (*ulop_addfilt)(ul_fd_t ul_fd,const ul_msginfo *msginfo);
  int (*ulop_abortmsg)(ul_fd_t ul_fd);
  int (*ulop_rewmsg)(ul_fd_t ul_fd);
  int (*ulop_inepoll)(ul_fd_t ul_fd);
  int (*ulop_drv_debflg)(ul_fd_t ul_fd,int debug_msk);
  int (*ulop_fd_wait)(ul_fd_t ul_fd, int wait_sec);
  ul_fd_direct_t (*ulop_fd2sys_fd)(ul_fd_t ul_fd);
  int (*ulop_setmyadr)(ul_fd_t ul_fd, int newmyadr);
  int (*ulop_setidstr)(ul_fd_t ul_fd, const char *idstr);
  int (*ulop_setbaudrate)(ul_fd_t ul_fd, int baudrate);
} ul_fd_ops_t;

typedef struct ul_fd_context_t {
  ul_fd_ops_t *fd_ops;
} ul_fd_context_t;

int ul_fd_ops_register(ul_fd_ops_t *fd_ops);
inline ul_fd_direct_t ul_fd2sys_fd(ul_fd_t fd);

#ifdef __cplusplus
} /* extern "C"*/
#endif

#endif /*_UL_FD_H*/