void
isc_stats_decrement(isc_stats_t *stats, isc_statscounter_t counter) {
REQUIRE(ISC_STATS_VALID(stats));
REQUIRE(counter < stats->ncounters);
decrementcounter(stats, (int)counter);
}
void
isc_stats_detach(isc_stats_t **statsp) {
isc_stats_t *stats;
REQUIRE(statsp != NULL && ISC_STATS_VALID(*statsp));
stats = *statsp;
*statsp = NULL;
LOCK(&stats->lock);
stats->references--;
UNLOCK(&stats->lock);
if (stats->references == 0) {
isc_mem_put(stats->mctx, stats->copiedcounters,
sizeof(isc_stat_t) * stats->ncounters);
isc_mem_put(stats->mctx, stats->counters,
sizeof(isc_stat_t) * stats->ncounters);
DESTROYLOCK(&stats->lock);
#ifdef ISC_RWLOCK_USEATOMIC
isc_rwlock_destroy(&stats->counterlock);
#endif
isc_mem_putanddetach(&stats->mctx, stats, sizeof(*stats));
}
}
void
isc_stats_set(isc_stats_t *stats, isc_uint64_t val,
isc_statscounter_t counter)
{
REQUIRE(ISC_STATS_VALID(stats));
REQUIRE(counter < stats->ncounters);
#ifdef ISC_RWLOCK_USEATOMIC
/*
* We use a "write" lock before "reading" the statistics counters as
* an exclusive lock.
*/
isc_rwlock_lock(&stats->counterlock, isc_rwlocktype_write);
#endif
#if ISC_STATS_USEMULTIFIELDS
stats->counters[counter].hi = (isc_uint32_t)((val >> 32) & 0xffffffff);
stats->counters[counter].lo = (isc_uint32_t)(val & 0xffffffff);
#else
stats->counters[counter] = val;
#endif
#ifdef ISC_RWLOCK_USEATOMIC
isc_rwlock_unlock(&stats->counterlock, isc_rwlocktype_write);
#endif
}
void
isc_stats_attach(isc_stats_t *stats, isc_stats_t **statsp) {
REQUIRE(ISC_STATS_VALID(stats));
REQUIRE(statsp != NULL && *statsp == NULL);
LOCK(&stats->lock);
stats->references++;
UNLOCK(&stats->lock);
*statsp = stats;
}
void
isc_stats_dump(isc_stats_t *stats, isc_stats_dumper_t dump_fn,
void *arg, unsigned int options)
{
int i;
REQUIRE(ISC_STATS_VALID(stats));
copy_counters(stats);
for (i = 0; i < stats->ncounters; i++) {
if ((options & ISC_STATSDUMP_VERBOSE) == 0 &&
stats->copiedcounters[i] == 0)
continue;
dump_fn((isc_statscounter_t)i, stats->copiedcounters[i], arg);
}
}
int
isc_stats_ncounters(isc_stats_t *stats) {
REQUIRE(ISC_STATS_VALID(stats));
return (stats->ncounters);
}