2 *------------------------------------------------------------------
3 * unix_shared_memory_queue.h - shared-memory queues
5 * Copyright (c) 2009 Cisco and/or its affiliates.
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.
17 *------------------------------------------------------------------
20 #ifndef included_unix_shared_memory_queue_h
21 #define included_unix_shared_memory_queue_h
24 #include <vppinfra/mem.h>
26 typedef struct _unix_shared_memory_queue {
27 pthread_mutex_t mutex; /* 8 bytes */
28 pthread_cond_t condvar; /* 8 bytes */
35 int signal_when_queue_non_empty;
37 } unix_shared_memory_queue_t;
39 unix_shared_memory_queue_t *
40 unix_shared_memory_queue_init(int nels,
43 int signal_when_queue_non_empty);
44 void unix_shared_memory_queue_free(unix_shared_memory_queue_t *q);
45 int unix_shared_memory_queue_add (unix_shared_memory_queue_t *q,
46 u8 *elem, int nowait);
47 int unix_shared_memory_queue_sub(unix_shared_memory_queue_t *q,
48 u8 *elem, int nowait);
49 void unix_shared_memory_queue_lock (unix_shared_memory_queue_t *q);
50 void unix_shared_memory_queue_unlock (unix_shared_memory_queue_t *q);
51 int unix_shared_memory_queue_is_full (unix_shared_memory_queue_t *q);
52 int unix_shared_memory_queue_add_nolock (unix_shared_memory_queue_t *q,
55 int unix_shared_memory_queue_sub_raw (unix_shared_memory_queue_t *q,
57 int unix_shared_memory_queue_add_raw (unix_shared_memory_queue_t *q,
60 #endif /* included_unix_shared_memory_queue_h */