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/*
* Copyright (C) 2009, 2012 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id$ */
#ifndef ISC_STATS_H
#define ISC_STATS_H 1
/*! \file isc/stats.h */
#include <isc/types.h>
ISC_LANG_BEGINDECLS
/*%<
* Flag(s) for isc_stats_dump().
*/
#define ISC_STATSDUMP_VERBOSE 0x00000001 /*%< dump 0-value counters */
/*%<
* Dump callback type.
*/
typedef void (*isc_stats_dumper_t)(isc_statscounter_t, isc_uint64_t, void *);
isc_result_t
isc_stats_create(isc_mem_t *mctx, isc_stats_t **statsp, int ncounters);
/*%<
* Create a statistics counter structure of general type. It counts a general
* set of counters indexed by an ID between 0 and ncounters -1.
*
* Requires:
*\li 'mctx' must be a valid memory context.
*
*\li 'statsp' != NULL && '*statsp' == NULL.
*
* Returns:
*\li ISC_R_SUCCESS -- all ok
*
*\li anything else -- failure
*/
void
isc_stats_attach(isc_stats_t *stats, isc_stats_t **statsp);
/*%<
* Attach to a statistics set.
*
* Requires:
*\li 'stats' is a valid isc_stats_t.
*
*\li 'statsp' != NULL && '*statsp' == NULL
*/
void
isc_stats_detach(isc_stats_t **statsp);
/*%<
* Detaches from the statistics set.
*
* Requires:
*\li 'statsp' != NULL and '*statsp' is a valid isc_stats_t.
*/
int
isc_stats_ncounters(isc_stats_t *stats);
/*%<
* Returns the number of counters contained in stats.
*
* Requires:
*\li 'stats' is a valid isc_stats_t.
*
*/
void
isc_stats_increment(isc_stats_t *stats, isc_statscounter_t counter);
/*%<
* Increment the counter-th counter of stats.
*
* Requires:
*\li 'stats' is a valid isc_stats_t.
*
*\li counter is less than the maximum available ID for the stats specified
* on creation.
*/
void
isc_stats_decrement(isc_stats_t *stats, isc_statscounter_t counter);
/*%<
* Decrement the counter-th counter of stats.
*
* Requires:
*\li 'stats' is a valid isc_stats_t.
*/
void
isc_stats_dump(isc_stats_t *stats, isc_stats_dumper_t dump_fn, void *arg,
unsigned int options);
/*%<
* Dump the current statistics counters in a specified way. For each counter
* in stats, dump_fn is called with its current value and the given argument
* arg. By default counters that have a value of 0 is skipped; if options has
* the ISC_STATSDUMP_VERBOSE flag, even such counters are dumped.
*
* Requires:
*\li 'stats' is a valid isc_stats_t.
*/
ISC_LANG_ENDDECLS
#endif /* ISC_STATS_H */
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