cb9cadad57
Change-Id: Ib246f1fbfce93274020ee93ce461e3d8bd8b9f17 Signed-off-by: Ed Warnicke <eaw@cisco.com>
61 lines
2.4 KiB
C
61 lines
2.4 KiB
C
/*
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*------------------------------------------------------------------
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* unix_shared_memory_queue.h - shared-memory queues
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*
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* Copyright (c) 2009 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*------------------------------------------------------------------
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*/
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#ifndef included_unix_shared_memory_queue_h
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#define included_unix_shared_memory_queue_h
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#include <pthread.h>
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#include <vppinfra/mem.h>
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typedef struct _unix_shared_memory_queue {
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pthread_mutex_t mutex; /* 8 bytes */
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pthread_cond_t condvar; /* 8 bytes */
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int head;
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int tail;
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int cursize;
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int maxsize;
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int elsize;
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int consumer_pid;
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int signal_when_queue_non_empty;
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char data[0];
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} unix_shared_memory_queue_t;
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unix_shared_memory_queue_t *
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unix_shared_memory_queue_init(int nels,
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int elsize,
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int consumer_pid,
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int signal_when_queue_non_empty);
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void unix_shared_memory_queue_free(unix_shared_memory_queue_t *q);
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int unix_shared_memory_queue_add (unix_shared_memory_queue_t *q,
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u8 *elem, int nowait);
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int unix_shared_memory_queue_sub(unix_shared_memory_queue_t *q,
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u8 *elem, int nowait);
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void unix_shared_memory_queue_lock (unix_shared_memory_queue_t *q);
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void unix_shared_memory_queue_unlock (unix_shared_memory_queue_t *q);
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int unix_shared_memory_queue_is_full (unix_shared_memory_queue_t *q);
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int unix_shared_memory_queue_add_nolock (unix_shared_memory_queue_t *q,
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u8 *elem);
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int unix_shared_memory_queue_sub_raw (unix_shared_memory_queue_t *q,
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u8 *elem);
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int unix_shared_memory_queue_add_raw (unix_shared_memory_queue_t *q,
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u8 *elem);
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#endif /* included_unix_shared_memory_queue_h */
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