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Refactor prng to not use 64-bit atomics on 32-bit platforms.

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This resolves #495.
This commit is contained in:
Jason Evans 2016-11-07 10:52:44 -08:00
parent a4e83e8593
commit 5d6cb6eb66
7 changed files with 365 additions and 33 deletions
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7
src/arena.c
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@ -1199,7 +1199,7 @@ arena_decay_deadline_init(arena_t *arena)
if (arena->decay.time > 0) {
nstime_t jitter;
nstime_init(&jitter, prng_range(&arena->decay.jitter_state,
nstime_init(&jitter, prng_range_u64(&arena->decay.jitter_state,
nstime_ns(&arena->decay.interval)));
nstime_add(&arena->decay.deadline, &jitter);
}
@ -2565,7 +2565,8 @@ arena_malloc_large(tsdn_t *tsdn, arena_t *arena, szind_t binind, bool zero)
* that is a multiple of the cacheline size, e.g. [0 .. 63) * 64
* for 4 KiB pages and 64-byte cachelines.
*/
r = prng_lg_range(&arena->offset_state, LG_PAGE - LG_CACHELINE);
r = prng_lg_range_zu(&arena->offset_state, LG_PAGE -
LG_CACHELINE, false);
random_offset = ((uintptr_t)r) << LG_CACHELINE;
} else
random_offset = 0;
@ -3503,7 +3504,7 @@ arena_new(tsdn_t *tsdn, unsigned ind)
* deterministic seed.
*/
arena->offset_state = config_debug ? ind :
(uint64_t)(uintptr_t)arena;
(size_t)(uintptr_t)arena;
}
arena->dss_prec = chunk_dss_prec_get();