pintos-doxygen/html/mmap-shuffle_8c_source.html

/** Creates a 128 kB file and repeatedly shuffles data in it

   through a memory mapping. */


#include <stdio.h>

#include <string.h>

#include <syscall.h>

#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));

    }

}

arc4.h

cksum
unsigned long cksum(const void *b_, size_t n)
This is the algorithm used by the Posix ‘cksum’ utility.
Definition: cksum.c:63

cksum.h

mmap
mapid_t mmap(int fd, void *addr)
Project 3 and optionally project 4.
Definition: syscall.c:145

create
bool create(const char *file, unsigned initial_size)
Definition: syscall.c:91

open
int open(const char *file)
Definition: syscall.c:103

MAP_FAILED
#define MAP_FAILED
Definition: syscall.h:13

msg
void msg(const char *format,...)
Definition: lib.c:28

lib.h

CHECK
#define CHECK(SUCCESS,...)
Takes an expression to test for SUCCESS and a message, which may include printf-style arguments.
Definition: lib.h:29

main.h

buf
static char * buf
Definition: mmap-shuffle.c:14

SIZE
#define SIZE
Creates a 128 kB file and repeatedly shuffles data in it through a memory mapping.
Definition: mmap-shuffle.c:12

test_main
void test_main(void)
tests/main.h
Definition: mmap-shuffle.c:17

string.h

shuffle
static void shuffle(struct value[], size_t)