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Fix for atomic aliasing in Clang or GCC builds

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This commit is contained in:
Vinnie Falco
2013-07-02 14:49:23 -07:00
parent ec672b939b
commit 147e0e78b9
1 changed files with 9 additions and 4 deletions
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13
Subtrees/beast/modules/beast_core/memory/beast_Atomic.h
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@@ -148,10 +148,15 @@ public:
volatile Type value; volatile Type value;
private: private:
static inline Type castFrom32Bit (int32 value) noexcept { return *(Type*) &value; } #if BEAST_CLANG || __GNUC__ >= 4
static inline Type castFrom64Bit (int64 value) noexcept { return *(Type*) &value; } #define BEAST_ATTRIBUTE_MAY_ALIAS __attribute__((__may_alias__))
static inline int32 castTo32Bit (Type value) noexcept { return *(int32*) &value; } #else
static inline int64 castTo64Bit (Type value) noexcept { return *(int64*) &value; } #define BEAST_ATTRIBUTE_MAY_ALIAS
#endif
static inline Type castFrom32Bit (int32 value) noexcept { Type * BEAST_ATTRIBUTE_MAY_ALIAS tmp = (Type*)&value; return *tmp; }
static inline Type castFrom64Bit (int64 value) noexcept { Type * BEAST_ATTRIBUTE_MAY_ALIAS tmp = (Type*)&value; return *tmp; }
static inline int32 castTo32Bit (Type value) noexcept { int32 * BEAST_ATTRIBUTE_MAY_ALIAS tmp = (int32*)&value; return *tmp; }
static inline int64 castTo64Bit (Type value) noexcept { int64 * BEAST_ATTRIBUTE_MAY_ALIAS tmp = (int64*)&value; return *tmp; }
Type operator++ (int); // better to just use pre-increment with atomics.. Type operator++ (int); // better to just use pre-increment with atomics..
Type operator-- (int); Type operator-- (int);