Function MallocUsage

src/memusage.h:52–64

 */

static inline size_t MallocUsage(size_t alloc)
{
    // Measured on libc6 2.19 on Linux.
    if (alloc == 0) {
        return 0;
    } else if (sizeof(void*) == 8) {
        return ((alloc + 31) >> 4) << 4;
    } else if (sizeof(void*) == 4) {
        return ((alloc + 15) >> 3) << 3;
    } else {
        assert(0);
    }
}

// STL data structures