diff options
Diffstat (limited to 'vlib-api/vlibmemory/unix_shared_memory_queue.h')
| -rw-r--r-- | vlib-api/vlibmemory/unix_shared_memory_queue.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/vlib-api/vlibmemory/unix_shared_memory_queue.h b/vlib-api/vlibmemory/unix_shared_memory_queue.h new file mode 100644 index 00000000000..86bc49fc28f --- /dev/null +++ b/vlib-api/vlibmemory/unix_shared_memory_queue.h @@ -0,0 +1,60 @@ +/* + *------------------------------------------------------------------ + * unix_shared_memory_queue.h - shared-memory queues + * + * Copyright (c) 2009 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *------------------------------------------------------------------ + */ + +#ifndef included_unix_shared_memory_queue_h +#define included_unix_shared_memory_queue_h + +#include <pthread.h> +#include <vppinfra/mem.h> + +typedef struct _unix_shared_memory_queue { + pthread_mutex_t mutex; /* 8 bytes */ + pthread_cond_t condvar; /* 8 bytes */ + int head; + int tail; + int cursize; + int maxsize; + int elsize; + int consumer_pid; + int signal_when_queue_non_empty; + char data[0]; +} unix_shared_memory_queue_t; + +unix_shared_memory_queue_t * +unix_shared_memory_queue_init(int nels, + int elsize, + int consumer_pid, + int signal_when_queue_non_empty); +void unix_shared_memory_queue_free(unix_shared_memory_queue_t *q); +int unix_shared_memory_queue_add (unix_shared_memory_queue_t *q, + u8 *elem, int nowait); +int unix_shared_memory_queue_sub(unix_shared_memory_queue_t *q, + u8 *elem, int nowait); +void unix_shared_memory_queue_lock (unix_shared_memory_queue_t *q); +void unix_shared_memory_queue_unlock (unix_shared_memory_queue_t *q); +int unix_shared_memory_queue_is_full (unix_shared_memory_queue_t *q); +int unix_shared_memory_queue_add_nolock (unix_shared_memory_queue_t *q, + u8 *elem); + +int unix_shared_memory_queue_sub_raw (unix_shared_memory_queue_t *q, + u8 *elem); +int unix_shared_memory_queue_add_raw (unix_shared_memory_queue_t *q, + u8 *elem); + +#endif /* included_unix_shared_memory_queue_h */ |