2 * Server-side IO completion ports implementation
4 * Copyright (C) 2007 Andrey Turkin
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.
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.
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
23 * - built-in wait queues used which means:
24 * + threads are awaken FIFO and not LIFO as native does
25 * + "max concurrent active threads" parameter not used
26 * + completion handle is waitable, while native isn't
30 #include "wine/port.h"
36 #define WIN32_NO_STATUS
40 #include "wine/unicode.h"
54 static void completion_dump( struct object*, int );
55 static struct object_type *completion_get_type( struct object *obj );
56 static void completion_destroy( struct object * );
57 static int completion_signaled( struct object *obj, struct thread *thread );
59 static const struct object_ops completion_ops =
61 sizeof(struct completion), /* size */
62 completion_dump, /* dump */
63 completion_get_type, /* get_type */
64 add_queue, /* add_queue */
65 remove_queue, /* remove_queue */
66 completion_signaled, /* signaled */
67 no_satisfied, /* satisfied */
68 no_signal, /* signal */
69 no_get_fd, /* get_fd */
70 no_map_access, /* map_access */
71 default_get_sd, /* get_sd */
72 default_set_sd, /* set_sd */
73 no_lookup_name, /* lookup_name */
74 no_open_file, /* open_file */
75 no_close_handle, /* close_handle */
76 completion_destroy /* destroy */
81 struct list queue_entry;
84 unsigned int information;
88 static void completion_destroy( struct object *obj)
90 struct completion *completion = (struct completion *) obj;
91 struct comp_msg *tmp, *next;
93 LIST_FOR_EACH_ENTRY_SAFE( tmp, next, &completion->queue, struct comp_msg, queue_entry )
99 static void completion_dump( struct object *obj, int verbose )
101 struct completion *completion = (struct completion *) obj;
103 assert( obj->ops == &completion_ops );
104 fprintf( stderr, "Completion " );
105 dump_object_name( &completion->obj );
106 fprintf( stderr, " (%u packets pending)\n", completion->depth );
109 static struct object_type *completion_get_type( struct object *obj )
111 static const WCHAR name[] = {'C','o','m','p','l','e','t','i','o','n'};
112 static const struct unicode_str str = { name, sizeof(name) };
113 return get_object_type( &str );
116 static int completion_signaled( struct object *obj, struct thread *thread )
118 struct completion *completion = (struct completion *)obj;
120 return !list_empty( &completion->queue );
123 static struct completion *create_completion( struct directory *root, const struct unicode_str *name, unsigned int attr, unsigned int concurrent )
125 struct completion *completion;
127 if ((completion = create_named_object_dir( root, name, attr, &completion_ops )))
129 if (get_error() != STATUS_OBJECT_NAME_EXISTS)
131 list_init( &completion->queue );
132 completion->depth = 0;
139 struct completion *get_completion_obj( struct process *process, obj_handle_t handle, unsigned int access )
141 return (struct completion *) get_handle_obj( process, handle, access, &completion_ops );
144 void add_completion( struct completion *completion, apc_param_t ckey, apc_param_t cvalue,
145 unsigned int status, unsigned int information )
147 struct comp_msg *msg = mem_alloc( sizeof( *msg ) );
153 msg->cvalue = cvalue;
154 msg->status = status;
155 msg->information = information;
157 list_add_tail( &completion->queue, &msg->queue_entry );
159 wake_up( &completion->obj, 1 );
162 /* create a completion */
163 DECL_HANDLER(create_completion)
165 struct completion *completion;
166 struct unicode_str name;
167 struct directory *root = NULL;
171 get_req_unicode_str( &name );
172 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
175 if ( (completion = create_completion( root, &name, req->attributes, req->concurrent )) != NULL )
177 reply->handle = alloc_handle( current->process, completion, req->access, req->attributes );
178 release_object( completion );
181 if (root) release_object( root );
184 /* open a completion */
185 DECL_HANDLER(open_completion)
187 struct completion *completion;
188 struct unicode_str name;
189 struct directory *root = NULL;
193 get_req_unicode_str( &name );
194 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
197 if ( (completion = open_object_dir( root, &name, req->attributes, &completion_ops )) != NULL )
199 reply->handle = alloc_handle( current->process, completion, req->access, req->attributes );
200 release_object( completion );
203 if (root) release_object( root );
207 /* add completion to completion port */
208 DECL_HANDLER(add_completion)
210 struct completion* completion = get_completion_obj( current->process, req->handle, IO_COMPLETION_MODIFY_STATE );
212 if (!completion) return;
214 add_completion( completion, req->ckey, req->cvalue, req->status, req->information );
216 release_object( completion );
219 /* get completion from completion port */
220 DECL_HANDLER(remove_completion)
222 struct completion* completion = get_completion_obj( current->process, req->handle, IO_COMPLETION_MODIFY_STATE );
224 struct comp_msg *msg;
226 if (!completion) return;
228 entry = list_head( &completion->queue );
230 set_error( STATUS_PENDING );
233 list_remove( entry );
235 msg = LIST_ENTRY( entry, struct comp_msg, queue_entry );
236 reply->ckey = msg->ckey;
237 reply->cvalue = msg->cvalue;
238 reply->status = msg->status;
239 reply->information = msg->information;
243 release_object( completion );
246 /* get queue depth for completion port */
247 DECL_HANDLER(query_completion)
249 struct completion* completion = get_completion_obj( current->process, req->handle, IO_COMPLETION_QUERY_STATE );
251 if (!completion) return;
253 reply->depth = completion->depth;
255 release_object( completion );