4 * Copyright (C) 1998 Alexandre Julliard
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
33 #define WIN32_NO_STATUS
43 struct list entry; /* entry in the hash list */
51 unsigned int hash_size; /* size of hash table */
52 struct list names[1]; /* array of hash entry lists */
57 static struct list object_list = LIST_INIT(object_list);
59 void dump_objects(void)
63 LIST_FOR_EACH( p, &object_list )
65 struct object *ptr = LIST_ENTRY( p, struct object, obj_list );
66 fprintf( stderr, "%p:%d: ", ptr, ptr->refcount );
67 ptr->ops->dump( ptr, 1 );
72 /*****************************************************************/
74 /* malloc replacement */
75 void *mem_alloc( size_t size )
77 void *ptr = malloc( size );
78 if (ptr) memset( ptr, 0x55, size );
79 else set_error( STATUS_NO_MEMORY );
83 /* duplicate a block of memory */
84 void *memdup( const void *data, size_t len )
86 void *ptr = malloc( len );
87 if (ptr) memcpy( ptr, data, len );
88 else set_error( STATUS_NO_MEMORY );
93 /*****************************************************************/
95 static int get_name_hash( const struct namespace *namespace, const WCHAR *name, size_t len )
99 while (len--) hash ^= tolowerW(*name++);
100 return hash % namespace->hash_size;
103 /* allocate a name for an object */
104 static struct object_name *alloc_name( const struct unicode_str *name )
106 struct object_name *ptr;
108 if ((ptr = mem_alloc( sizeof(*ptr) + name->len - sizeof(ptr->name) )))
110 ptr->len = name->len;
111 memcpy( ptr->name, name->str, name->len );
116 /* free the name of an object */
117 static void free_name( struct object *obj )
119 struct object_name *ptr = obj->name;
120 list_remove( &ptr->entry );
124 /* set the name of an existing object */
125 static void set_object_name( struct namespace *namespace,
126 struct object *obj, struct object_name *ptr )
128 int hash = get_name_hash( namespace, ptr->name, ptr->len );
130 list_add_head( &namespace->names[hash], &ptr->entry );
135 /* get the name of an existing object */
136 const WCHAR *get_object_name( struct object *obj, size_t *len )
138 struct object_name *ptr = obj->name;
139 if (!ptr) return NULL;
144 /* allocate and initialize an object */
145 void *alloc_object( const struct object_ops *ops )
147 struct object *obj = mem_alloc( ops->size );
153 list_init( &obj->wait_queue );
155 list_add_head( &object_list, &obj->obj_list );
162 void *create_named_object( struct namespace *namespace, const struct object_ops *ops,
163 const struct unicode_str *name, unsigned int attributes )
166 struct object_name *name_ptr;
168 if (!name || !name->len) return alloc_object( ops );
170 if ((obj = find_object( namespace, name, attributes )))
172 if (attributes & OBJ_OPENIF && obj->ops == ops)
173 set_error( STATUS_OBJECT_NAME_EXISTS );
176 release_object( obj );
178 if (attributes & OBJ_OPENIF)
179 set_error( STATUS_OBJECT_TYPE_MISMATCH );
181 set_error( STATUS_OBJECT_NAME_COLLISION );
185 if (!(name_ptr = alloc_name( name ))) return NULL;
186 if ((obj = alloc_object( ops )))
188 set_object_name( namespace, obj, name_ptr );
191 else free( name_ptr );
195 /* dump the name of an object to stderr */
196 void dump_object_name( struct object *obj )
198 if (!obj->name) fprintf( stderr, "name=\"\"" );
201 fprintf( stderr, "name=L\"" );
202 dump_strW( obj->name->name, obj->name->len/sizeof(WCHAR), stderr, "\"\"" );
203 fputc( '\"', stderr );
207 /* grab an object (i.e. increment its refcount) and return the object */
208 struct object *grab_object( void *ptr )
210 struct object *obj = (struct object *)ptr;
211 assert( obj->refcount < INT_MAX );
216 /* release an object (i.e. decrement its refcount) */
217 void release_object( void *ptr )
219 struct object *obj = (struct object *)ptr;
220 assert( obj->refcount );
221 if (!--obj->refcount)
223 /* if the refcount is 0, nobody can be in the wait queue */
224 assert( list_empty( &obj->wait_queue ));
225 obj->ops->destroy( obj );
226 if (obj->name) free_name( obj );
228 list_remove( &obj->obj_list );
229 memset( obj, 0xaa, obj->ops->size );
235 /* find an object by its name; the refcount is incremented */
236 struct object *find_object( const struct namespace *namespace, const struct unicode_str *name,
237 unsigned int attributes )
239 const struct list *list, *p;
241 if (!name || !name->len) return NULL;
243 list = &namespace->names[ get_name_hash( namespace, name->str, name->len ) ];
244 LIST_FOR_EACH( p, list )
246 const struct object_name *ptr = LIST_ENTRY( p, const struct object_name, entry );
247 if (ptr->len != name->len) continue;
248 if (attributes & OBJ_CASE_INSENSITIVE)
250 if (!strncmpiW( ptr->name, name->str, name->len/sizeof(WCHAR) ))
251 return grab_object( ptr->obj );
255 if (!memcmp( ptr->name, name->str, name->len ))
256 return grab_object( ptr->obj );
262 /* allocate a namespace */
263 struct namespace *create_namespace( unsigned int hash_size )
265 struct namespace *namespace;
268 namespace = mem_alloc( sizeof(*namespace) + (hash_size - 1) * sizeof(namespace->names[0]) );
271 namespace->hash_size = hash_size;
272 for (i = 0; i < hash_size; i++) list_init( &namespace->names[i] );
277 /* functions for unimplemented/default object operations */
279 int no_add_queue( struct object *obj, struct wait_queue_entry *entry )
281 set_error( STATUS_OBJECT_TYPE_MISMATCH );
285 int no_satisfied( struct object *obj, struct thread *thread )
287 return 0; /* not abandoned */
290 int no_signal( struct object *obj, unsigned int access )
292 set_error( STATUS_OBJECT_TYPE_MISMATCH );
296 struct fd *no_get_fd( struct object *obj )
298 set_error( STATUS_OBJECT_TYPE_MISMATCH );
302 struct object *no_lookup_name( struct object *obj, struct unicode_str *name,
308 int no_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
310 return 1; /* ok to close */
313 void no_destroy( struct object *obj )