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  1. #include <iostream>
  2. #include <cstdint>
  3. #include <cstddef>
  4.  
  5. using namespace std;
  6.  
  7. using al64_uint32_t = uint32_t __attribute__((aligned(64)));
  8.  
  9. struct Foo
  10. {
  11. 	uint32_t a;
  12. 	uint32_t b;
  13. 	uint32_t c;
  14. 	uint32_t d;
  15. };
  16.  
  17. struct Bar
  18. {
  19. 	uint32_t a;
  20. 	uint32_t b;
  21. 	al64_uint32_t c;
  22. 	uint32_t d;
  23. };
  24.  
  25.  
  26. int main() 
  27. {
  28.  
  29. 	cout << sizeof(al64_uint32_t) << endl;
  30. 	cout << sizeof(Foo) << endl;
  31. 	cout << sizeof(Bar) << endl;
  32.  
  33. 	cout << "a: " << offsetof(Bar, a) << endl;
  34. 	cout << "b: " << offsetof(Bar, b) << endl;
  35. 	cout << "c: " << offsetof(Bar, c) << endl;
  36. 	cout << "d: " << offsetof(Bar, d) << endl;
  37.  
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 3468KB
comments (?)
stdin
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Standard input is empty
stdout
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4
16
128
a: 0
b: 4
c: 64
d: 68
https://ideone.com/8um9v1
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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