numam-dpdk/lib/librte_bitratestats/rte_bitrate.h

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2017 Intel Corporation. All rights reserved.
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 *   modification, are permitted provided that the following conditions
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 *       notice, this list of conditions and the following disclaimer.
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 *       the documentation and/or other materials provided with the
 *       distribution.
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 *       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
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 */

#ifndef _RTE_BITRATE_H_
#define _RTE_BITRATE_H_

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 *  Bitrate statistics data structure.
 *  This data structure is intentionally opaque.
 */
struct rte_stats_bitrates;


/**
 * Allocate a bitrate statistics structure
 *
 * @return
 *   - Pointer to structure on success
 *   - NULL on error (zmalloc failure)
 */
struct rte_stats_bitrates *rte_stats_bitrate_create(void);


/**
 * Register bitrate statistics with the metric library.
 *
 * @param bitrate_data
 *   Pointer allocated by rte_stats_create()
 *
 * @return
 *   Zero on success
 *   Negative on error
 */
int rte_stats_bitrate_reg(struct rte_stats_bitrates *bitrate_data);


/**
 * Calculate statistics for current time window. The period with which
 * this function is called should be the intended sampling window width.
 *
 * @param bitrate_data
 *   Bitrate statistics data pointer
 *
 * @param port_id
 *   Port id to calculate statistics for
 *
 * @return
 *  - Zero on success
 *  - Negative value on error
 */
int rte_stats_bitrate_calc(struct rte_stats_bitrates *bitrate_data,
	uint8_t port_id);

#ifdef __cplusplus
}
#endif

#endif /* _RTE_BITRATE_H_ */