minix/servers/vfs/lock.h

   1 #ifndef __VFS_LOCK_H__
   2 #define __VFS_LOCK_H__
   3
   4 /* This is the file locking table.  Like the filp table, it points to the
   5  * inode table, however, in this case to achieve advisory locking.
   6  */
   7 EXTERN struct file_lock {
   8   short lock_type;              /* F_RDLOCK or F_WRLOCK; 0 means unused slot */
   9   pid_t lock_pid;               /* pid of the process holding the lock */
  10   struct vnode *lock_vnode;
  11   off_t lock_first;             /* offset of first byte locked */
  12   off_t lock_last;              /* offset of last byte locked */
  13 } file_lock[NR_LOCKS];
  14
  15 #endif