Alignment.cpp

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#include <stddef.h>
#include <stdint.h>

// Note that this align function aligns UP using the alignment mask, not the
// alignment boundary.
//
// e.g., use align(ptr, 31) NOT align(ptr, 32) for 32-byte alignment
//
uint8_t *
align(uint8_t *ptr, uint32_t alignmentMask)
   {
   return (uint8_t*)((size_t)(ptr + alignmentMask) & (~(size_t)alignmentMask));
   }