/* Creates a 128 kB file and repeatedly shuffles data in it
through a memory mapping. */
#include
#include
#include
#include “tests/arc4.h”
#include “tests/cksum.h”
#include “tests/lib.h”
#include “tests/main.h”
#define SIZE (128 * 1024)
static char *buf = (char *) 0x10000000;
void
test_main (void)
{
size_t i;
int handle;
/* Create file, mmap. */
CHECK (create (“buffer”, SIZE), “create \”buffer\””);
CHECK ((handle = open (“buffer”)) > 1, “open \”buffer\””);
CHECK (mmap (handle, buf) != MAP_FAILED, “mmap \”buffer\””);
/* Initialize. */
for (i = 0; i < SIZE; i++)
buf[i] = i * 257;
msg ("init: cksum=%lu", cksum (buf, SIZE));
/* Shuffle repeatedly. */
for (i = 0; i < 10; i++)
{
shuffle (buf, SIZE, 1);
msg ("shuffle %zu: cksum=%lu", i, cksum (buf, SIZE));
}
}