49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
#ifndef JEMALLOC_INTERNAL_TICKER_H
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#define JEMALLOC_INTERNAL_TICKER_H
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/**
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* A ticker makes it easy to count-down events until some limit. You
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* ticker_init the ticker to trigger every nticks events. You then notify it
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* that an event has occurred with calls to ticker_tick (or that nticks events
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* have occurred with a call to ticker_ticks), which will return true (and reset
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* the counter) if the countdown hit zero.
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*/
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typedef struct {
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int32_t tick;
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int32_t nticks;
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} ticker_t;
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static inline void
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ticker_init(ticker_t *ticker, int32_t nticks) {
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ticker->tick = nticks;
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ticker->nticks = nticks;
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}
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static inline void
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ticker_copy(ticker_t *ticker, const ticker_t *other) {
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*ticker = *other;
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}
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static inline int32_t
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ticker_read(const ticker_t *ticker) {
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return ticker->tick;
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}
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static inline bool
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ticker_ticks(ticker_t *ticker, int32_t nticks) {
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if (unlikely(ticker->tick < nticks)) {
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ticker->tick = ticker->nticks;
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return true;
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}
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ticker->tick -= nticks;
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return(false);
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}
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static inline bool
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ticker_tick(ticker_t *ticker) {
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return ticker_ticks(ticker, 1);
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}
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#endif /* JEMALLOC_INTERNAL_TICKER_H */
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