server/async.h

   1 /*
   2  * Async i/o definitions
   3  *
   4  * Copyright (C) 2000 Mike McCormack
   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 _SERVER_ASYNC_
  22 #define _SERVER_ASYNC_
  23
  24 #include <sys/time.h>
  25 #include "object.h"
  26
  27 struct async_queue;
  28
  29 struct async
  30 {
  31     struct object       *obj;
  32     struct thread       *thread;
  33     void                *overlapped;
  34     unsigned int         status;
  35     struct timeval       when;
  36     struct timeout_user *timeout;
  37     struct async        *next,*prev;
  38     struct async_queue  *q;
  39 };
  40
  41 struct async_queue
  42 {
  43     struct async        *head;
  44     struct async        *tail;
  45 };
  46
  47 void destroy_async( struct async *async );
  48 void destroy_async_queue( struct async_queue *q );
  49 void async_notify(struct async *async, int status);
  50 struct async *find_async(struct async_queue *q, struct thread *thread, void *overlapped);
  51 void async_insert(struct async_queue *q, struct async *async);
  52 struct async *create_async(struct object *obj, struct thread *thread,
  53                            void *overlapped);
  54 void async_add_timeout(struct async *async, int timeout);
  55 static inline void init_async_queue(struct async_queue *q)
  56 {
  57     q->head = q->tail = NULL;
  58 }
  59
  60 #define IS_READY(q) (((q).head) && ((q).head->status==STATUS_PENDING))
  61
  62 #endif /* _SERVER_ASYNC_ */
  63