common.h

   1
   2 /*
   3  * libjio - A library for Journaled I/O
   4  * Alberto Bertogli (albertogli@telpin.com.ar)
   5  *
   6  * Header for internal functions
   7  */
   8
   9 #ifndef _COMMON_H
  10 #define _COMMON_H
  11
  12 #include <sys/types.h>  /* for ssize_t and off_t */
  13 #include <stdint.h>     /* for uint*_t */
  14
  15
  16 #define _F_READ         0x00001
  17 #define _F_WRITE        0x00010
  18 #define _F_LOCK         0x00100
  19 #define _F_TLOCK        0x01000
  20 #define _F_ULOCK        0x10000
  21
  22 #define F_LOCKR         (_F_LOCK | _F_READ)
  23 #define F_LOCKW         (_F_LOCK | _F_WRITE)
  24 #define F_TLOCKR        (_F_TLOCK | _F_READ)
  25 #define F_TLOCKW        (_F_TLOCK | _F_WRITE)
  26 #define F_UNLOCK        (_F_ULOCK)
  27
  28
  29 off_t plockf(int fd, int cmd, off_t offset, off_t len);
  30 ssize_t spread(int fd, void *buf, size_t count, off_t offset);
  31 ssize_t spwrite(int fd, const void *buf, size_t count, off_t offset);
  32 int get_jdir(const char *filename, char *jdir);
  33 int get_jtfile(const char *filename, int tid, char *jtfile);
  34
  35 int checksum(int fd, size_t len, uint32_t *csum);
  36 uint32_t checksum_map(uint8_t *map, size_t count);
  37
  38 #endif
  39