24 // Reference on memory alignment:
25 // http://stackoverflow.com/questions/227897/solve-the-memory-alignment-in-c-interview-question-tha…
28 uintptr_t GetRightAlign(uintptr_t start_pos, size_t alignment) {  in GetRightAlign()  argument
29   // The pointer should be aligned with |alignment| bytes. The - 1 guarantees  in GetRightAlign()
31   return (start_pos + alignment - 1) & ~(alignment - 1);  in GetRightAlign()
34 // Alignment must be an integer power of two.
35 bool ValidAlignment(size_t alignment) {  in ValidAlignment()  argument
36   if (!alignment) {  in ValidAlignment()
39   return (alignment & (alignment - 1)) == 0;  in ValidAlignment()
42 void* GetRightAlign(const void* pointer, size_t alignment) {  in GetRightAlign()  argument
46   if (!ValidAlignment(alignment)) {  in GetRightAlign()
50   return reinterpret_cast<void*>(GetRightAlign(start_pos, alignment));  in GetRightAlign()
53 void* AlignedMalloc(size_t size, size_t alignment) {  in AlignedMalloc()  argument
57   if (!ValidAlignment(alignment)) {  in AlignedMalloc()
62   // alignment - 1 bytes needs to be allocated.  in AlignedMalloc()
65   void* memory_pointer = malloc(size + sizeof(uintptr_t) + alignment - 1);  in AlignedMalloc()
72   uintptr_t aligned_pos = GetRightAlign(align_start_pos, alignment);  in AlignedMalloc()