server: Make struct async into a real object, to keep it around while the APC is running.
diff --git a/server/async.c b/server/async.c
new file mode 100644
index 0000000..cb4675c
--- /dev/null
+++ b/server/async.c
@@ -0,0 +1,148 @@
+/*
+ * Server-side async I/O support
+ *
+ * Copyright (C) 2007 Alexandre Julliard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#include "ntstatus.h"
+#define WIN32_NO_STATUS
+#include "windef.h"
+#include "winternl.h"
+
+#include "object.h"
+#include "file.h"
+#include "request.h"
+
+struct async
+{
+ struct object obj; /* object header */
+ struct thread *thread; /* owning thread */
+ struct list queue_entry; /* entry in file descriptor queue */
+ struct timeout_user *timeout;
+ void *apc; /* apc function to call when alerted */
+ void *user; /* user-private argument for apc */
+ void *sb; /* pointer to I/O status block in client addr space */
+};
+
+static void async_dump( struct object *obj, int verbose );
+static void async_destroy( struct object *obj );
+
+static const struct object_ops async_ops =
+{
+ sizeof(struct async), /* size */
+ async_dump, /* dump */
+ no_add_queue, /* add_queue */
+ NULL, /* remove_queue */
+ NULL, /* signaled */
+ NULL, /* satisfied */
+ no_signal, /* signal */
+ no_get_fd, /* get_fd */
+ no_map_access, /* map_access */
+ no_lookup_name, /* lookup_name */
+ no_close_handle, /* close_handle */
+ async_destroy /* destroy */
+};
+
+static void async_dump( struct object *obj, int verbose )
+{
+ struct async *async = (struct async *)obj;
+ assert( obj->ops == &async_ops );
+ fprintf( stderr, "Async thread=%p\n", async->thread );
+}
+
+static void async_destroy( struct object *obj )
+{
+ struct async *async = (struct async *)obj;
+ assert( obj->ops == &async_ops );
+
+ if (async->timeout) remove_timeout_user( async->timeout );
+ release_object( async->thread );
+}
+
+/* notifies client thread of new status of its async request */
+/* destroys the server side of it */
+static void async_terminate( struct async *async, unsigned int status )
+{
+ apc_call_t data;
+
+ memset( &data, 0, sizeof(data) );
+ data.type = APC_ASYNC_IO;
+ data.async_io.func = async->apc;
+ data.async_io.user = async->user;
+ data.async_io.sb = async->sb;
+ data.async_io.status = status;
+ thread_queue_apc( async->thread, &async->obj, &data );
+
+ if (async->timeout) remove_timeout_user( async->timeout );
+ async->timeout = NULL;
+ list_remove( &async->queue_entry );
+ release_object( async );
+}
+
+/* callback for timeout on an async request */
+static void async_timeout( void *private )
+{
+ struct async *async = private;
+
+ async->timeout = NULL;
+ async_terminate( async, STATUS_TIMEOUT );
+}
+
+/* create an async on a given queue of a fd */
+struct async *create_async( struct thread *thread, const struct timeval *timeout,
+ struct list *queue, void *io_apc, void *io_user, void *io_sb )
+{
+ struct async *async = alloc_object( &async_ops );
+
+ if (!async) return NULL;
+
+ async->thread = (struct thread *)grab_object( thread );
+ async->apc = io_apc;
+ async->user = io_user;
+ async->sb = io_sb;
+
+ list_add_tail( queue, &async->queue_entry );
+
+ if (timeout) async->timeout = add_timeout_user( timeout, async_timeout, async );
+ else async->timeout = NULL;
+
+ return async;
+}
+
+/* terminate the async operation at the head of the queue */
+void async_terminate_head( struct list *queue, unsigned int status )
+{
+ struct list *ptr = list_head( queue );
+ if (ptr) async_terminate( LIST_ENTRY( ptr, struct async, queue_entry ), status );
+}
+
+/* terminate all async operations on the queue */
+void async_terminate_queue( struct list *queue, unsigned int status )
+{
+ struct list *ptr, *next;
+
+ LIST_FOR_EACH_SAFE( ptr, next, queue )
+ {
+ struct async *async = LIST_ENTRY( ptr, struct async, queue_entry );
+ async_terminate( async, status );
+ }
+}
