server/file.h

   1 /*
   2  * Server-side file definitions
   3  *
   4  * Copyright (C) 2003 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef __WINE_SERVER_FILE_H
  22 #define __WINE_SERVER_FILE_H
  23
  24 #include "object.h"
  25
  26 struct fd;
  27
  28 typedef unsigned __int64 file_pos_t;
  29
  30 /* operations valid on file descriptor objects */
  31 struct fd_ops
  32 {
  33     /* get the events we want to poll() for on this object */
  34     int  (*get_poll_events)(struct fd *);
  35     /* a poll() event occurred */
  36     void (*poll_event)(struct fd *,int event);
  37     /* flush the object buffers */
  38     int  (*flush)(struct fd *, struct event **);
  39     /* get file information */
  40     int  (*get_file_info)(struct fd *,struct get_file_info_reply *, int *flags);
  41     /* queue an async operation - see register_async handler in async.c*/
  42     void (*queue_async)(struct fd *, void* ptr, unsigned int status, int type, int count);
  43 };
  44
  45 /* file descriptor functions */
  46
  47 extern struct fd *alloc_fd( const struct fd_ops *fd_user_ops, struct object *user );
  48 extern struct fd *open_fd( struct fd *fd, const char *name, int flags, mode_t *mode );
  49 extern struct fd *create_anonymous_fd( const struct fd_ops *fd_user_ops,
  50                                        int unix_fd, struct object *user );
  51 extern void *get_fd_user( struct fd *fd );
  52 extern int get_unix_fd( struct fd *fd );
  53 extern void fd_poll_event( struct fd *fd, int event );
  54 extern int check_fd_events( struct fd *fd, int events );
  55 extern void set_fd_events( struct fd *fd, int events );
  56 extern obj_handle_t lock_fd( struct fd *fd, file_pos_t offset, file_pos_t count, int shared, int wait );
  57 extern void unlock_fd( struct fd *fd, file_pos_t offset, file_pos_t count );
  58 extern int flush_cached_fd( struct process *process, obj_handle_t handle );
  59
  60 extern int default_fd_add_queue( struct object *obj, struct wait_queue_entry *entry );
  61 extern void default_fd_remove_queue( struct object *obj, struct wait_queue_entry *entry );
  62 extern int default_fd_signaled( struct object *obj, struct thread *thread );
  63 extern void default_poll_event( struct fd *fd, int event );
  64 extern int no_flush( struct fd *fd, struct event **event );
  65 extern int no_get_file_info( struct fd *fd, struct get_file_info_reply *info, int *flags );
  66 extern void no_queue_async( struct fd *fd, void* ptr, unsigned int status, int type, int count );
  67 extern void main_loop(void);
  68
  69 inline static struct fd *get_obj_fd( struct object *obj ) { return obj->ops->get_fd( obj ); }
  70
  71 /* timeout functions */
  72
  73 struct timeout_user;
  74
  75 typedef void (*timeout_callback)( void *private );
  76
  77 extern struct timeout_user *add_timeout_user( struct timeval *when,
  78                                               timeout_callback func, void *private );
  79 extern void remove_timeout_user( struct timeout_user *user );
  80 extern void add_timeout( struct timeval *when, int timeout );
  81 /* return 1 if t1 is before t2 */
  82 static inline int time_before( struct timeval *t1, struct timeval *t2 )
  83 {
  84     return ((t1->tv_sec < t2->tv_sec) ||
  85             ((t1->tv_sec == t2->tv_sec) && (t1->tv_usec < t2->tv_usec)));
  86 }
  87
  88 /* file functions */
  89
  90 extern struct file *get_file_obj( struct process *process, obj_handle_t handle,
  91                                   unsigned int access );
  92 extern int get_file_unix_fd( struct file *file );
  93 extern int is_same_file( struct file *file1, struct file *file2 );
  94 extern int is_file_removable( struct file *file );
  95 extern int grow_file( struct file *file, int size_high, int size_low );
  96 extern struct file *create_temp_file( int access );
  97 extern void file_set_error(void);
  98
  99 /* change notification functions */
 100
 101 extern void do_change_notify( int unix_fd );
 102 extern void sigio_callback(void);
 103
 104 #endif  /* __WINE_SERVER_FILE_H */