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 *);
  41     /* queue an async operation */
  42     void (*queue_async)(struct fd *, void* apc, void* user, void* io_sb, int type, int count);
  43     /* cancel an async operation */
  44     void (*cancel_async)(struct fd *);
  45 };
  46
  47 /* file descriptor functions */
  48
  49 extern struct fd *alloc_fd( const struct fd_ops *fd_user_ops, struct object *user );
  50 extern struct fd *open_fd( struct fd *fd, const char *name, int flags, mode_t *mode,
  51                            unsigned int access, unsigned int sharing, unsigned int options );
  52 extern struct fd *create_anonymous_fd( const struct fd_ops *fd_user_ops,
  53                                        int unix_fd, struct object *user );
  54 extern void *get_fd_user( struct fd *fd );
  55 extern int get_unix_fd( struct fd *fd );
  56 extern int is_same_file_fd( struct fd *fd1, struct fd *fd2 );
  57 extern void fd_poll_event( struct fd *fd, int event );
  58 extern int check_fd_events( struct fd *fd, int events );
  59 extern void set_fd_events( struct fd *fd, int events );
  60 extern obj_handle_t lock_fd( struct fd *fd, file_pos_t offset, file_pos_t count, int shared, int wait );
  61 extern void unlock_fd( struct fd *fd, file_pos_t offset, file_pos_t count );
  62
  63 extern int default_fd_add_queue( struct object *obj, struct wait_queue_entry *entry );
  64 extern void default_fd_remove_queue( struct object *obj, struct wait_queue_entry *entry );
  65 extern int default_fd_signaled( struct object *obj, struct thread *thread );
  66 extern int default_fd_get_poll_events( struct fd *fd );
  67 extern void default_poll_event( struct fd *fd, int event );
  68 extern void fd_queue_async_timeout( struct fd *fd, void *apc, void *user, void *io_sb, int type, int count, int *timeout );
  69 extern void default_fd_queue_async( struct fd *fd, void *apc, void *user, void *io_sb, int type, int count );
  70 extern void default_fd_cancel_async( struct fd *fd );
  71 extern int no_flush( struct fd *fd, struct event **event );
  72 extern int no_get_file_info( struct fd *fd );
  73 extern void no_queue_async( struct fd *fd, void* apc, void* user, void* io_sb, int type, int count);
  74 extern void no_cancel_async( struct fd *fd );
  75 extern void main_loop(void);
  76 extern void remove_process_locks( struct process *process );
  77
  78 inline static struct fd *get_obj_fd( struct object *obj ) { return obj->ops->get_fd( obj ); }
  79
  80 /* timeout functions */
  81
  82 struct timeout_user;
  83
  84 typedef void (*timeout_callback)( void *private );
  85
  86 extern struct timeout_user *add_timeout_user( const struct timeval *when,
  87                                               timeout_callback func, void *private );
  88 extern void remove_timeout_user( struct timeout_user *user );
  89 extern void add_timeout( struct timeval *when, int timeout );
  90 /* return 1 if t1 is before t2 */
  91 static inline int time_before( const struct timeval *t1, const struct timeval *t2 )
  92 {
  93     return ((t1->tv_sec < t2->tv_sec) ||
  94             ((t1->tv_sec == t2->tv_sec) && (t1->tv_usec < t2->tv_usec)));
  95 }
  96
  97 /* file functions */
  98
  99 extern struct file *get_file_obj( struct process *process, obj_handle_t handle,
 100                                   unsigned int access );
 101 extern int get_file_unix_fd( struct file *file );
 102 extern int is_same_file( struct file *file1, struct file *file2 );
 103 extern int grow_file( struct file *file, file_pos_t size );
 104 extern struct file *create_temp_file( int access );
 105 extern void file_set_error(void);
 106
 107 /* change notification functions */
 108
 109 extern void do_change_notify( int unix_fd );
 110 extern void sigio_callback(void);
 111
 112 /* serial port functions */
 113
 114 extern int is_serial_fd( struct fd *fd );
 115 extern struct object *create_serial( struct fd *fd, unsigned int options );
 116
 117 /* async I/O functions */
 118 extern struct async *create_async( struct thread *thread, int* timeout,
 119                                    struct list *queue, void *, void *, void *);
 120 extern void async_terminate_head( struct list *queue, int status );
 121
 122 static inline void async_terminate_queue( struct list *queue, int status )
 123 {
 124     while (!list_empty( queue )) async_terminate_head( queue, status );
 125 }
 126
 127 #endif  /* __WINE_SERVER_FILE_H */