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by Just_Harry
535 days ago
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> I don’t understand why these extra paddings are present and why one is gone. Even with pragma pack 8, should not it be only one padding? If you're referring to `__pad2` in the example, that trailing padding is there to ensure that the size of the struct is a multiple of its alignment, which is 8, so that if there's a contiguous span of those structures, each instance after the first one will remained properly aligned.
Without `__pad2`, that struct would be 36-bytes, which would cause every other instance in an array/contiguous-span to be aligned on 4 bytes instead of 8. |
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