diff options
Diffstat (limited to 'src/web/api/queries/incremental_sum/incremental_sum.h')
-rw-r--r-- | src/web/api/queries/incremental_sum/incremental_sum.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/web/api/queries/incremental_sum/incremental_sum.h b/src/web/api/queries/incremental_sum/incremental_sum.h new file mode 100644 index 000000000..f110c5861 --- /dev/null +++ b/src/web/api/queries/incremental_sum/incremental_sum.h @@ -0,0 +1,71 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_API_QUERY_INCREMENTAL_SUM_H +#define NETDATA_API_QUERY_INCREMENTAL_SUM_H + +#include "../query.h" +#include "../rrdr.h" + +struct tg_incremental_sum { + NETDATA_DOUBLE first; + NETDATA_DOUBLE last; + size_t count; +}; + +// resets when switches dimensions +// so, clear everything to restart +static inline void tg_incremental_sum_reset(RRDR *r) { + struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data; + g->first = NAN; + g->last = NAN; + g->count = 0; +} + +static inline void tg_incremental_sum_create(RRDR *r, const char *options __maybe_unused) { + r->time_grouping.data = onewayalloc_mallocz(r->internal.owa, sizeof(struct tg_incremental_sum)); + tg_incremental_sum_reset(r); +} + +static inline void tg_incremental_sum_free(RRDR *r) { + onewayalloc_freez(r->internal.owa, r->time_grouping.data); + r->time_grouping.data = NULL; +} + +static inline void tg_incremental_sum_add(RRDR *r, NETDATA_DOUBLE value) { + struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data; + + if(unlikely(!g->count)) { + if(isnan(g->first)) + g->first = value; + else + g->last = value; + + g->count++; + } + else { + g->last = value; + g->count++; + } +} + +static inline NETDATA_DOUBLE tg_incremental_sum_flush(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) { + struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data; + + NETDATA_DOUBLE value; + + if(unlikely(!g->count || isnan(g->first) || isnan(g->last))) { + value = 0.0; + *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY; + } + else { + value = g->last - g->first; + } + + g->first = g->last; + g->last = NAN; + g->count = 0; + + return value; +} + +#endif //NETDATA_API_QUERY_INCREMENTAL_SUM_H |