4 * Copyright 1996 Alexandre Julliard
14 /* The declarations are here to avoid including a lot of unnecessary files */
15 extern const K32OBJ_OPS SEMAPHORE_Ops;
16 extern const K32OBJ_OPS EVENT_Ops;
17 extern const K32OBJ_OPS MUTEX_Ops;
18 extern const K32OBJ_OPS CRITICAL_SECTION_Ops;
19 extern const K32OBJ_OPS PROCESS_Ops;
20 extern const K32OBJ_OPS THREAD_Ops;
21 extern const K32OBJ_OPS FILE_Ops;
22 extern const K32OBJ_OPS CHANGE_Ops;
23 extern const K32OBJ_OPS MEM_MAPPED_FILE_Ops;
24 extern const K32OBJ_OPS DEVICE_Ops;
25 extern const K32OBJ_OPS CONSOLE_Ops;
27 static const K32OBJ_OPS K32OBJ_NullOps =
32 NULL, /* remove_wait */
38 const K32OBJ_OPS * const K32OBJ_Ops[K32OBJ_NBOBJECTS] =
41 &SEMAPHORE_Ops, /* K32OBJ_SEMAPHORE */
42 &EVENT_Ops, /* K32OBJ_EVENT */
43 &MUTEX_Ops, /* K32OBJ_MUTEX */
44 &CRITICAL_SECTION_Ops, /* K32OBJ_CRITICAL_SECTION */
45 &PROCESS_Ops, /* K32OBJ_PROCESS */
46 &THREAD_Ops, /* K32OBJ_THREAD */
47 &FILE_Ops, /* K32OBJ_FILE */
48 &CHANGE_Ops, /* K32OBJ_CHANGE */
49 &CONSOLE_Ops, /* K32OBJ_CONSOLE */
50 &K32OBJ_NullOps, /* K32OBJ_SCREEN_BUFFER */
51 &MEM_MAPPED_FILE_Ops, /* K32OBJ_MEM_MAPPED_FILE */
52 &K32OBJ_NullOps, /* K32OBJ_SERIAL */
53 &DEVICE_Ops, /* K32OBJ_DEVICE_IOCTL */
54 &K32OBJ_NullOps, /* K32OBJ_PIPE */
55 &K32OBJ_NullOps, /* K32OBJ_MAILSLOT */
56 &K32OBJ_NullOps, /* K32OBJ_TOOLHELP_SNAPSHOT */
57 &K32OBJ_NullOps /* K32OBJ_SOCKET */
68 static NAME_ENTRY *K32OBJ_FirstEntry = NULL;
71 /***********************************************************************
74 void K32OBJ_IncCount( K32OBJ *ptr )
76 assert( ptr->type && ((unsigned)ptr->type < K32OBJ_NBOBJECTS) );
80 assert( ptr->refcount > 0 ); /* No wrap-around allowed */
84 /***********************************************************************
87 void K32OBJ_DecCount( K32OBJ *ptr )
91 assert( ptr->type && ((unsigned)ptr->type < K32OBJ_NBOBJECTS) );
92 assert( ptr->refcount > 0 );
100 /* Check if the object has a name entry and free it */
102 pptr = &K32OBJ_FirstEntry;
103 while (*pptr && ((*pptr)->obj != ptr)) pptr = &(*pptr)->next;
106 NAME_ENTRY *entry = *pptr;
108 HeapFree( SystemHeap, 0, entry );
111 /* Free the object */
113 if (K32OBJ_Ops[ptr->type]->destroy) K32OBJ_Ops[ptr->type]->destroy( ptr );
118 /***********************************************************************
121 * Check if a pointer is a valid kernel object
123 BOOL32 K32OBJ_IsValid( K32OBJ *ptr, K32OBJ_TYPE type )
125 if (IsBadReadPtr32( ptr, sizeof(*ptr) )) return FALSE;
126 return (ptr->type == type);
130 /***********************************************************************
133 * Add a name entry for an object. We don't check for duplicates here.
134 * FIXME: should use some sort of hashing.
136 BOOL32 K32OBJ_AddName( K32OBJ *obj, LPCSTR name )
141 if (!name) return TRUE; /* Anonymous object */
142 len = strlen( name );
144 if (!(entry = HeapAlloc( SystemHeap, 0, sizeof(NAME_ENTRY) + len )))
147 SetLastError( ERROR_OUTOFMEMORY );
150 entry->next = K32OBJ_FirstEntry;
153 lstrcpy32A( entry->name, name );
154 K32OBJ_FirstEntry = entry;
160 /***********************************************************************
163 * Create a named kernel object.
164 * Returns NULL if there was an error _or_ if the object already existed.
165 * The refcount of the object must be decremented once it is initialized.
167 K32OBJ *K32OBJ_Create( K32OBJ_TYPE type, DWORD size, LPCSTR name, int server_handle,
168 DWORD access, SECURITY_ATTRIBUTES *sa, HANDLE32 *handle)
170 BOOL32 inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
172 /* Check if the name already exists */
174 K32OBJ *obj = K32OBJ_FindName( name );
177 if (obj->type == type)
179 SetLastError( ERROR_ALREADY_EXISTS );
180 *handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, server_handle );
184 SetLastError( ERROR_DUP_NAME );
185 *handle = INVALID_HANDLE_VALUE32;
186 if (server_handle != -1) CLIENT_CloseHandle( server_handle );
188 K32OBJ_DecCount( obj );
192 /* Create the object */
195 if (!(obj = HeapAlloc( SystemHeap, 0, size )))
198 *handle = INVALID_HANDLE_VALUE32;
199 if (server_handle != -1) CLIENT_CloseHandle( server_handle );
205 /* Add a name for it */
207 if (!K32OBJ_AddName( obj, name ))
209 /* Don't call the destroy function, as the object wasn't
210 * initialized properly */
211 HeapFree( SystemHeap, 0, obj );
213 *handle = INVALID_HANDLE_VALUE32;
214 if (server_handle != -1) CLIENT_CloseHandle( server_handle );
218 /* Allocate a handle */
220 *handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, server_handle );
226 /***********************************************************************
229 * Find the object referenced by a given name.
230 * The reference count is incremented.
232 K32OBJ *K32OBJ_FindName( LPCSTR name )
237 if (!name) return NULL; /* Anonymous object */
238 len = strlen( name );
240 entry = K32OBJ_FirstEntry;
243 if ((len == entry->len) && !strcmp( name, entry->name))
245 K32OBJ *obj = entry->obj;
246 K32OBJ_IncCount( obj );
257 /***********************************************************************
258 * K32OBJ_FindNameType
260 * Find an object by name and check its type.
261 * The reference count is incremented.
263 K32OBJ *K32OBJ_FindNameType( LPCSTR name, K32OBJ_TYPE type )
265 K32OBJ *obj = K32OBJ_FindName( name );
266 if (!obj) return NULL;
267 if (obj->type == type) return obj;
268 SetLastError( ERROR_DUP_NAME );
269 K32OBJ_DecCount( obj );