/usr/include/dnscore/threaded_ringbuffer.h is in libyadifa-dev 2.1.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* Copyright (c) 2011-2016, EURid. All rights reserved.
* The YADIFA TM software product is provided under the BSD 3-clause license:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of EURid nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*------------------------------------------------------------------------------
*
*/
/** @defgroup threading Threading, pools, queues, ...
* @ingroup dnscore
* @brief
*
*
*
* @{
*
*----------------------------------------------------------------------------*/
#ifndef _THREADED_RINGBUFFER_H
#define _THREADED_RINGBUFFER_H
#include <pthread.h>
#include <dnscore/sys_types.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct threaded_ringbuffer threaded_ringbuffer;
struct threaded_ringbuffer_node;
/* NOTE: The algorithm does not need these to be volatile */
struct threaded_ringbuffer
{
void** buffer;
void** buffer_limit;
void** write_slot;
void** read_slot;
pthread_mutex_t mutex;
pthread_mutex_t mutex_enqueue;
pthread_mutex_t mutex_dequeue;
u32 max_size;
u32 size;
};
#define THREADED_RINGBUFFER_NULL {0,0,0,0,PTHREAD_MUTEX_INITIALIZER,PTHREAD_MUTEX_INITIALIZER,PTHREAD_MUTEX_INITIALIZER,0,0}
void threaded_ringbuffer_init(threaded_ringbuffer* queue, int max_size);
void threaded_ringbuffer_finalize(threaded_ringbuffer* queue);
void threaded_ringbuffer_enqueue(threaded_ringbuffer* queue,void* constant_pointer);
bool threaded_ringbuffer_try_enqueue(threaded_ringbuffer* queue,void* constant_pointer);
void* threaded_ringbuffer_peek(threaded_ringbuffer* queue);
void* threaded_ringbuffer_try_peek(threaded_ringbuffer* queue);
void* threaded_ringbuffer_dequeue(threaded_ringbuffer* queue);
void* threaded_ringbuffer_try_dequeue(threaded_ringbuffer *queue);
u32 threaded_ringbuffer_dequeue_set(threaded_ringbuffer* queue, void** array, u32 array_size);
void threaded_ringbuffer_wait_empty(threaded_ringbuffer* queue);
int threaded_ringbuffer_size(threaded_ringbuffer* queue);
/*
* The queue will block (write) if bigger than this.
* Note that if the key is already bigger it will blocked (write) until
* the content is emptied by the readers.
*/
ya_result threaded_ringbuffer_set_maxsize(threaded_ringbuffer *queue, int max_size);
#ifdef __cplusplus
}
#endif
#endif /* _THREADED_QUEUE_H */
/** @} */
/*----------------------------------------------------------------------------*/
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