2 * Server-side support for async i/o operations
4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2000 Mike McCormack
23 void destroy_async( struct async *async )
25 struct async_queue *aq = async->q;
27 /*fprintf(stderr,"destroyed async %p\n",async->overlapped); */
30 remove_timeout_user(async->timeout);
31 async->timeout = NULL;
34 async->prev->next = async->next;
36 aq->head = async->next;
39 async->next->prev = async->prev;
41 aq->tail = async->prev;
50 void async_notify(struct async *async, int status)
52 /* fprintf(stderr,"notifying %p!\n",async->overlapped); */
53 async->status = status;
54 thread_queue_apc(async->thread, NULL, async->func, APC_ASYNC, 1, 2, async->overlapped, status);
57 void destroy_async_queue( struct async_queue *q )
61 async_notify(q->head, STATUS_HANDLES_CLOSED);
62 destroy_async(q->head);
66 struct async *find_async(struct async_queue *q, struct thread *thread, void *overlapped)
70 /* fprintf(stderr,"find_async: %p\n",overlapped); */
75 for(async = q->head; async; async = async->next)
76 if((async->overlapped==overlapped) && (async->thread == thread))
82 void async_insert(struct async_queue *q, struct async *async)
85 async->prev = q->tail;
89 q->tail->next = async;
96 static void async_callback(void *private)
98 struct async *async = (struct async *)private;
100 /* fprintf(stderr,"%p timeout out\n",async->overlapped); */
101 async->timeout = NULL;
102 async_notify(async, STATUS_TIMEOUT);
103 destroy_async(async);
106 struct async *create_async(struct object *obj, struct thread *thread, void *func,
109 struct async *async = (struct async *) malloc(sizeof(struct async));
112 set_error(STATUS_NO_MEMORY);
117 async->thread = thread;
119 async->overlapped = overlapped;
123 async->status = STATUS_PENDING;
124 async->timeout = NULL;
129 void async_add_timeout(struct async *async, int timeout)
133 gettimeofday( &async->when, 0 );
134 add_timeout( &async->when, timeout );
135 async->timeout = add_timeout_user( &async->when, async_callback, async );
139 DECL_HANDLER(register_async)
143 if (!(obj = get_handle_obj( current->process, req->handle, 0, NULL)) )
146 if(obj->ops->queue_async)
148 struct async_queue *q = obj->ops->queue_async(obj, NULL, req->type, 0);
151 async = find_async(q, current, req->overlapped);
152 if(req->status==STATUS_PENDING)
155 async = create_async(obj, current, req->func, req->overlapped);
159 async->status = req->status;
160 if(!obj->ops->queue_async(obj, async, req->type, req->count))
161 destroy_async(async);
167 destroy_async(async);
169 set_error(STATUS_INVALID_PARAMETER);
172 set_select_events(obj,obj->ops->get_poll_events(obj));
175 set_error(STATUS_INVALID_HANDLE);