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Apparently sizeof(unsigned) is 4 bytes on both 32 and 64 bit platforms

Browse source 
For now assume sizeof(int) == 4 for all supported platforms, could be
changed in the future.

Added an assert to functions which depends on this this, so we'll
easily notice bad things happening.
This commit is contained in:
Sergey Sharybin 2013-08-19 14:03:44 +00:00
parent c79e175d9b
commit cbfd2a8e62
1 changed files with 11 additions and 1 deletions
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12
intern/atomic/atomic_ops.h
View file

@ -29,6 +29,8 @@
#ifndef ATOMIC_OPS_H__
#define ATOMIC_OPS_H__
#include <assert.h>
#if defined (__APPLE__)
# include <libkern/OSAtomic.h>
#elif defined(_MSC_VER)
@ -52,7 +54,7 @@
#if defined(_M_X64) || defined(__amd64__) || defined(__x86_64__)
# define LG_SIZEOF_PTR 3
# define LG_SIZEOF_INT 3
# define LG_SIZEOF_INT 2
#else
# define LG_SIZEOF_PTR 2
# define LG_SIZEOF_INT 2
@ -251,6 +253,8 @@ atomic_sub_uint32(uint32_t *p, uint32_t x)
ATOMIC_INLINE size_t
atomic_add_z(size_t *p, size_t x)
{
assert(sizeof(size_t) == 1 << LG_SIZEOF_PTR);
#if (LG_SIZEOF_PTR == 3)
return ((size_t)atomic_add_uint64((uint64_t *)p, (uint64_t)x));
#elif (LG_SIZEOF_PTR == 2)
@ -261,6 +265,8 @@ atomic_add_z(size_t *p, size_t x)
ATOMIC_INLINE size_t
atomic_sub_z(size_t *p, size_t x)
{
assert(sizeof(size_t) == 1 << LG_SIZEOF_PTR);
#if (LG_SIZEOF_PTR == 3)
return ((size_t)atomic_add_uint64((uint64_t *)p,
(uint64_t)-((int64_t)x)));
@ -275,6 +281,8 @@ atomic_sub_z(size_t *p, size_t x)
ATOMIC_INLINE unsigned
atomic_add_u(unsigned *p, unsigned x)
{
assert(sizeof(unsigned) == 1 << LG_SIZEOF_INT);
#if (LG_SIZEOF_INT == 3)
return ((unsigned)atomic_add_uint64((uint64_t *)p, (uint64_t)x));
#elif (LG_SIZEOF_INT == 2)
@ -285,6 +293,8 @@ atomic_add_u(unsigned *p, unsigned x)
ATOMIC_INLINE unsigned
atomic_sub_u(unsigned *p, unsigned x)
{
assert(sizeof(unsigned) == 1 << LG_SIZEOF_INT);
#if (LG_SIZEOF_INT == 3)
return ((unsigned)atomic_add_uint64((uint64_t *)p,
(uint64_t)-((int64_t)x)));