mirror of https://github.com/yandex/odyssey.git
52 lines
761 B
C
52 lines
761 B
C
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#ifndef OD_STAT_H_
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#define OD_STAT_H_
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/*
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* odissey.
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*
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* PostgreSQL connection pooler and request router.
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*/
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typedef struct od_stat_t od_stat_t;
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#define OD_STAT_MAX 8
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struct od_stat_t {
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int pos;
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uint32_t stat[OD_STAT_MAX];
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};
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static inline void
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od_stat_init(od_stat_t *stat)
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{
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stat->pos = 0;
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memset(stat->stat, 0, sizeof(stat->stat));
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}
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static inline void
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od_stat_tick(od_stat_t *stat)
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{
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stat->pos = (stat->pos + 1) % OD_STAT_MAX;
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stat->stat[stat->pos] = 0;
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}
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static inline void
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od_stat_add(od_stat_t *stat, uint32_t value)
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{
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stat->stat[stat->pos] += value;
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}
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static inline float
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od_stat_avg(od_stat_t *stat)
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{
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float sum = 0;
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int i = 0;
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while (i < OD_STAT_MAX) {
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sum += stat->stat[i];
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i++;
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}
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return sum / (float)OD_STAT_MAX;
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}
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#endif
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