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Use the right type for atomic compare-exchange

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This commit is contained in:
Chris Robinson
2014-08-01 02:47:46 -07:00
parent 1c1e878be7
commit 659b340716
1 changed files with 4 additions and 4 deletions
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include/atomic.h
+4 -4
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@@ -83,9 +83,9 @@ inline void *ExchangePtr(XchgPtr *ptr, void *newval)
})
#define ATOMIC_COMPARE_EXCHANGE_STRONG(T, _val, _oldval, _newval) __extension__({ \
static_assert(sizeof(T)==sizeof((_val)->value), "Type "#T" has incorrect size!"); \
__typeof(*_oldval) _old = *(_oldval); \
*(_oldval) = __sync_val_compare_and_swap(&(_val)->value, _old, (_newval)); \
*(_oldval) == _old; \
T _o = *(_oldval); \
*(_oldval) = __sync_val_compare_and_swap(&(_val)->value, _o, (_newval)); \
*(_oldval) == _o; \
})
/* Atomics using x86/x86-64 GCC inline assembly */
@@ -175,7 +175,7 @@ inline void *ExchangePtr(XchgPtr *dest, void *newval)
#define ATOMIC_COMPARE_EXCHANGE_STRONG(T, _val, _oldval, _newval) __extension__({ \
static_assert(sizeof(T)==4 || sizeof(T)==8, "Type "#T" has incorrect size!"); \
static_assert(sizeof(T)==sizeof((_val)->value), "Type "#T" has incorrect size!"); \
__typeof(*_oldval) _old = *(_oldval); \
T _old = *(_oldval); \
if(sizeof(T) == 4) WRAP_CMPXCHG("l", *(_oldval), &(_val)->value, _old, (T)(_newval)); \
else if(sizeof(T) == 8) WRAP_CMPXCHG("q", *(_oldval), &(_val)->value, _old, (T)(_newval)); \
*(_oldval) == _old; \