c++ - How to ensure a member is 4-byte aligned? -

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To use the OSAtomicDecrement (MAC-specific nuclear operation), I need to provide a 4-byte alliance SInt32 .

Is there such a cooking job? Another way to deal with alignment issues? 

  struct SomeClass {SomeClass () {member_ = & amp; Collection_ + ((4 - (and storage_% 4))% 4); * Member_ = 0; } SInt32 * member_; Struct {SInt32 a; SInt32b; } Storage_; };

If you are on a Mac, this means GCC. GCC can auto-align for you: 

  __ distributed (__ aligned __ (4)) int32_t member_;

Please note that this is not portable for compilers because it's GCC specific.


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