2 * Copyright (c) 2008-2009 Apple Inc. All rights reserved.
4 * @APPLE_APACHE_LICENSE_HEADER_START@
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * @APPLE_APACHE_LICENSE_HEADER_END@
22 * IMPORTANT: This header file describes INTERNAL interfaces to libdispatch
23 * which are subject to change in future releases of Mac OS X. Any applications
24 * relying on these interfaces WILL break.
27 #ifndef __DISPATCH_SEMAPHORE_INTERNAL__
28 #define __DISPATCH_SEMAPHORE_INTERNAL__
30 struct dispatch_sema_notify_s {
31 struct dispatch_sema_notify_s *dsn_next;
32 dispatch_queue_t dsn_queue;
34 void (*dsn_func)(void *);
37 struct dispatch_semaphore_s {
38 DISPATCH_STRUCT_HEADER(dispatch_semaphore_s, dispatch_semaphore_vtable_s);
41 size_t dsema_sent_ksignals;
42 #if USE_MACH_SEM && USE_POSIX_SEM
43 #error "Too many supported semaphore types"
45 semaphore_t dsema_port;
46 semaphore_t dsema_waiter_port;
50 #error "No supported semaphore type"
52 size_t dsema_group_waiters;
53 struct dispatch_sema_notify_s *dsema_notify_head;
54 struct dispatch_sema_notify_s *dsema_notify_tail;
57 extern const struct dispatch_semaphore_vtable_s _dispatch_semaphore_vtable;