9bad079039
Use a single uint64_t in nstime_t to store nanoseconds rather than using struct timespec. This reduces fragility around conversions between long and uint64_t, especially missing casts that only cause problems on 32-bit platforms.
149 lines
2.4 KiB
C
149 lines
2.4 KiB
C
#include "jemalloc/internal/jemalloc_internal.h"
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#define BILLION UINT64_C(1000000000)
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void
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nstime_init(nstime_t *time, uint64_t ns)
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{
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time->ns = ns;
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}
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void
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nstime_init2(nstime_t *time, uint64_t sec, uint64_t nsec)
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{
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time->ns = sec * BILLION + nsec;
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}
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uint64_t
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nstime_ns(const nstime_t *time)
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{
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return (time->ns);
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}
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uint64_t
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nstime_sec(const nstime_t *time)
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{
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return (time->ns / BILLION);
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}
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uint64_t
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nstime_nsec(const nstime_t *time)
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{
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return (time->ns % BILLION);
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}
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void
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nstime_copy(nstime_t *time, const nstime_t *source)
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{
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*time = *source;
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}
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int
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nstime_compare(const nstime_t *a, const nstime_t *b)
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{
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return ((a->ns > b->ns) - (a->ns < b->ns));
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}
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void
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nstime_add(nstime_t *time, const nstime_t *addend)
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{
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assert(UINT64_MAX - time->ns >= addend->ns);
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time->ns += addend->ns;
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}
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void
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nstime_subtract(nstime_t *time, const nstime_t *subtrahend)
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{
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assert(nstime_compare(time, subtrahend) >= 0);
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time->ns -= subtrahend->ns;
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}
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void
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nstime_imultiply(nstime_t *time, uint64_t multiplier)
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{
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assert((((time->ns | multiplier) & (UINT64_MAX << (sizeof(uint64_t) <<
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2))) == 0) || ((time->ns * multiplier) / multiplier == time->ns));
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time->ns *= multiplier;
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}
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void
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nstime_idivide(nstime_t *time, uint64_t divisor)
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{
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assert(divisor != 0);
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time->ns /= divisor;
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}
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uint64_t
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nstime_divide(const nstime_t *time, const nstime_t *divisor)
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{
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assert(divisor->ns != 0);
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return (time->ns / divisor->ns);
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}
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#ifdef JEMALLOC_JET
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#undef nstime_update
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#define nstime_update JEMALLOC_N(nstime_update_impl)
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#endif
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bool
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nstime_update(nstime_t *time)
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{
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nstime_t old_time;
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nstime_copy(&old_time, time);
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#ifdef _WIN32
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{
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FILETIME ft;
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uint64_t ticks;
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GetSystemTimeAsFileTime(&ft);
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ticks = (((uint64_t)ft.dwHighDateTime) << 32) |
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ft.dwLowDateTime;
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time->ns = ticks * 100;
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}
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#elif JEMALLOC_CLOCK_GETTIME
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{
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struct timespec ts;
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if (sysconf(_SC_MONOTONIC_CLOCK) > 0)
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clock_gettime(CLOCK_MONOTONIC, &ts);
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else
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clock_gettime(CLOCK_REALTIME, &ts);
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time->ns = ts.tv_sec * BILLION + ts.tv_nsec;
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}
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#else
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struct timeval tv;
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gettimeofday(&tv, NULL);
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time->ns = tv.tv_sec * BILLION + tv.tv_usec * 1000;
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#endif
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/* Handle non-monotonic clocks. */
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if (unlikely(nstime_compare(&old_time, time) > 0)) {
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nstime_copy(time, &old_time);
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return (true);
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}
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return (false);
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}
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#ifdef JEMALLOC_JET
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#undef nstime_update
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#define nstime_update JEMALLOC_N(nstime_update)
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nstime_update_t *nstime_update = JEMALLOC_N(nstime_update_impl);
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#endif
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