#include <cstdio>    // for printf.
#include <cstddef>	// for size.
#include <cstdint>	// for uintptr_t.
using namespace std;
 
void *alignment(void *p, std::size_t align_size)
{
	std::uintptr_t i = reinterpret_cast<std::uintptr_t>(p);
	i = (i + (align_size - 1)) / align_size * align_size;
 
	return reinterpret_cast<void *>(i);
}
 
int main()
{
	void *p = reinterpret_cast<void *>(33);
	std::printf("%p\n", p);
 
	auto *p32 = alignment(p, 32);
	std::printf("%p\n", p32);
 
	getchar();
}
 
 

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