#include <assert.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define ALLOC_SZ 128

int main(void) {
    /* glibc defaults to 16 byte alignment with regular malloc on x86_64, and 8 byte for x86 */
    char *mem = aligned_alloc(32, ALLOC_SZ);
    char *mem2 = NULL;

    int memalign_status = posix_memalign((void **)&mem2, ALLOC_SZ, ALLOC_SZ);
    assert(memalign_status != ENOMEM);
    assert(memalign_status != EINVAL); // Fails on non-power-of-two alignment

    char *mem3 = valloc(getpagesize());
    int   pgsize = getpagesize();
    printf("Page size: %d\n", pgsize);

    memset(mem, 'B', ALLOC_SZ);
    memset(mem2, 'C', ALLOC_SZ);
    memset(mem3, 'A', getpagesize());

    assert((uintptr_t)mem3 % 4096 == 0);
    assert((uintptr_t)mem2 % 128 == 0);
    assert((uintptr_t)mem % 32 == 0);

    free(mem);
    free(mem2);
    free(mem3);

    printf("Passed!\n");
}