The #pragma pack directive in C++ might be useful for stack allocations. http://stackoverflow.com/questions/3318410/pragma-pack-effect http://stackoverflow.com/

The #pragma pack directive in C++ might be useful for stack allocations. http://stackoverflow.com/questions/3318410/pragma-pack-effect http://stackoverflow.com/questions/3318410/pragma-pack-effec... For heap allocation you have _aligned_malloc() and memalign().