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