project-base/server-skynet-source-3rd-jemalloc
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Avoid negation of unsigned numbers.

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Rather than relying on two's complement negation for alignment mask
generation, use bitwise not and addition.  This dodges warnings from
MSVC, and should be strength-reduced by compiler optimization anyway.
This commit is contained in:
Jason Evans 2016-10-27 21:26:33 -07:00
parent 2379479225
commit 87004d238c
1 changed files with 2 additions and 2 deletions
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4
include/jemalloc/internal/jemalloc_internal.h.in
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@ -337,7 +337,7 @@ typedef unsigned szind_t;
/* Return the nearest aligned address at or below a. */ /* Return the nearest aligned address at or below a. */
#define ALIGNMENT_ADDR2BASE(a, alignment) \ #define ALIGNMENT_ADDR2BASE(a, alignment) \
((void *)((uintptr_t)(a) & (-(alignment)))) ((void *)((uintptr_t)(a) & ((~(alignment)) + 1)))
/* Return the offset between a and the nearest aligned address at or below a. */ /* Return the offset between a and the nearest aligned address at or below a. */
#define ALIGNMENT_ADDR2OFFSET(a, alignment) \ #define ALIGNMENT_ADDR2OFFSET(a, alignment) \
@ -345,7 +345,7 @@ typedef unsigned szind_t;
/* Return the smallest alignment multiple that is >= s. */ /* Return the smallest alignment multiple that is >= s. */
#define ALIGNMENT_CEILING(s, alignment) \ #define ALIGNMENT_CEILING(s, alignment) \
(((s) + (alignment - 1)) & (-(alignment))) (((s) + (alignment - 1)) & ((~(alignment)) + 1))
/* Declare a variable-length array. */ /* Declare a variable-length array. */
#if __STDC_VERSION__ < 199901L #if __STDC_VERSION__ < 199901L