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Do not advance decay epoch when time goes backwards.

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Instead, move the epoch backward in time.  Additionally, add
nstime_monotonic() and use it in debug builds to assert that time only
goes backward if nstime_update() is using a non-monotonic time source.
This commit is contained in:
Jason Evans 2016-10-10 22:15:10 -07:00
parent ee0c74b77a
commit 5f11fb7d43
6 changed files with 63 additions and 6 deletions
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3
include/jemalloc/internal/nstime.h
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@ -31,9 +31,12 @@ void nstime_imultiply(nstime_t *time, uint64_t multiplier);
void nstime_idivide(nstime_t *time, uint64_t divisor);
uint64_t nstime_divide(const nstime_t *time, const nstime_t *divisor);
#ifdef JEMALLOC_JET
typedef bool (nstime_monotonic_t)(void);
extern nstime_monotonic_t *nstime_monotonic;
typedef bool (nstime_update_t)(nstime_t *);
extern nstime_update_t *nstime_update;
#else
bool nstime_monotonic(void);
bool nstime_update(nstime_t *time);
#endif

1
include/jemalloc/internal/private_symbols.txt
View file

@ -298,6 +298,7 @@ nstime_idivide
nstime_imultiply
nstime_init
nstime_init2
nstime_monotonic
nstime_ns
nstime_nsec
nstime_sec