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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 e0a9e78374
commit 04b463546e
8 changed files with 340 additions and 58 deletions
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4
include/jemalloc/internal/extent.h
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@ -325,8 +325,8 @@ extent_addr_randomize(tsdn_t *tsdn, extent_t *extent, size_t alignment)
if (alignment < PAGE) {
unsigned lg_range = LG_PAGE -
lg_floor(CACHELINE_CEILING(alignment));
uint64_t r =
prng_lg_range(&extent_arena_get(extent)->offset_state,
size_t r =
prng_lg_range_zu(&extent_arena_get(extent)->offset_state,
lg_range, true);
uintptr_t random_offset = ((uintptr_t)r) << (LG_PAGE -
lg_range);