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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 struct async_queue;
  28
  29 typedef unsigned __int64 file_pos_t;
  30
  31 /* operations valid on file descriptor objects */
  32 struct fd_ops
  33 {
  34     /* get the events we want to poll() for on this object */
  35     int  (*get_poll_events)(struct fd *);
  36     /* a poll() event occurred */
  37     void (*poll_event)(struct fd *,int event);
  38     /* flush the object buffers */
  39     void (*flush)(struct fd *, struct event **);
  40     /* get file information */
  41     enum server_fd_type (*get_file_info)(struct fd *fd, int *flags);
  42     /* queue an async operation */
  43     void (*queue_async)(struct fd *, const async_data_t *data, int type, int count);
  44     /* cancel an async operation */
  45     void (*cancel_async)(struct fd *);
  46 };
  47
  48 /* file descriptor functions */
  49
  50 extern struct fd *alloc_pseudo_fd( const struct fd_ops *fd_user_ops, struct object *user );
  51 extern struct fd *open_fd( const char *name, int flags, mode_t *mode, unsigned int access,
  52                            unsigned int sharing, unsigned int options );
  53 extern struct fd *create_anonymous_fd( const struct fd_ops *fd_user_ops,
  54                                        int unix_fd, struct object *user );
  55 extern void *get_fd_user( struct fd *fd );
  56 extern void set_fd_user( struct fd *fd, const struct fd_ops *ops, struct object *user );
  57 extern int get_unix_fd( struct fd *fd );
  58 extern int is_same_file_fd( struct fd *fd1, struct fd *fd2 );
  59 extern int is_fd_removable( struct fd *fd );
  60 extern int fd_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
  61 extern void fd_poll_event( struct fd *fd, int event );
  62 extern int check_fd_events( struct fd *fd, int events );
  63 extern void set_fd_events( struct fd *fd, int events );
  64 extern obj_handle_t lock_fd( struct fd *fd, file_pos_t offset, file_pos_t count, int shared, int wait );
  65 extern void unlock_fd( struct fd *fd, file_pos_t offset, file_pos_t count );
  66
  67 extern int default_fd_add_queue( struct object *obj, struct wait_queue_entry *entry );
  68 extern void default_fd_remove_queue( struct object *obj, struct wait_queue_entry *entry );
  69 extern int default_fd_signaled( struct object *obj, struct thread *thread );
  70 extern int default_fd_get_poll_events( struct fd *fd );
  71 extern void default_poll_event( struct fd *fd, int event );
  72 extern struct async *fd_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
  73 extern void fd_async_wake_up( struct fd *fd, int type, unsigned int status );
  74 extern void default_fd_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
  75 extern void default_fd_cancel_async( struct fd *fd );
  76 extern void no_flush( struct fd *fd, struct event **event );
  77 extern enum server_fd_type no_get_file_info( struct fd *fd, int *flags );
  78 extern void no_queue_async( struct fd *fd, const async_data_t *data, int type, int count);
  79 extern void no_cancel_async( struct fd *fd );
  80 extern void main_loop(void);
  81 extern void remove_process_locks( struct process *process );
  82
  83 static inline struct fd *get_obj_fd( struct object *obj ) { return obj->ops->get_fd( obj ); }
  84
  85 /* timeout functions */
  86
  87 struct timeout_user;
  88 extern struct timeval current_time;
  89
  90 typedef void (*timeout_callback)( void *private );
  91
  92 extern struct timeout_user *add_timeout_user( const struct timeval *when,
  93                                               timeout_callback func, void *private );
  94 extern void remove_timeout_user( struct timeout_user *user );
  95 extern void add_timeout( struct timeval *when, int timeout );
  96 /* return 1 if t1 is before t2 */
  97 static inline int time_before( const struct timeval *t1, const struct timeval *t2 )
  98 {
  99     return ((t1->tv_sec < t2->tv_sec) ||
 100             ((t1->tv_sec == t2->tv_sec) && (t1->tv_usec < t2->tv_usec)));
 101 }
 102
 103 /* file functions */
 104
 105 extern struct file *get_file_obj( struct process *process, obj_handle_t handle,
 106                                   unsigned int access );
 107 extern int get_file_unix_fd( struct file *file );
 108 extern int is_same_file( struct file *file1, struct file *file2 );
 109 extern struct file *grab_file_unless_removable( struct file *file );
 110 extern int grow_file( struct file *file, file_pos_t size );
 111 extern struct file *create_temp_file( int access );
 112 extern void file_set_error(void);
 113
 114 /* change notification functions */
 115
 116 extern void do_change_notify( int unix_fd );
 117 extern void sigio_callback(void);
 118 extern struct object *create_dir_obj( struct fd *fd );
 119
 120 /* serial port functions */
 121
 122 extern int is_serial_fd( struct fd *fd );
 123 extern struct object *create_serial( struct fd *fd, unsigned int options );
 124
 125 /* async I/O functions */
 126 extern struct async_queue *create_async_queue( struct fd *fd );
 127 extern void free_async_queue( struct async_queue *queue );
 128 extern struct async *create_async( struct thread *thread, struct async_queue *queue,
 129                                    const async_data_t *data );
 130 extern void async_set_timeout( struct async *async, const struct timeval *timeout,
 131                                unsigned int status );
 132 extern void async_set_result( struct object *obj, unsigned int status );
 133 extern int async_waiting( struct async_queue *queue );
 134 extern void async_wake_up( struct async_queue *queue, unsigned int status );
 135
 136 /* access rights that require Unix read permission */
 137 #define FILE_UNIX_READ_ACCESS (FILE_READ_DATA|FILE_READ_ATTRIBUTES|FILE_READ_EA)
 138
 139 /* access rights that require Unix write permission */
 140 #define FILE_UNIX_WRITE_ACCESS (FILE_WRITE_DATA|FILE_WRITE_ATTRIBUTES|FILE_WRITE_EA)
 141
 142 #endif  /* __WINE_SERVER_FILE_H */