Subversion Repositories c0or1k

/*
 * Test mmap/munmap posix calls.
 *
 * Copyright (C) 2007 - 2008 Bahadir Balban
 */
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <tests.h>

#define PAGE_SIZE               0x1000

int mmaptest(void)
{
        int fd;
        void *base;
        int x = 0x1000;

        if ((fd = open("./newfile.txt", O_CREAT | O_TRUNC | O_RDWR, S_IRWXU)) < 0)
                perror("open:");
        else
                printf("open: Success.\n");

        /* Extend the file */
        if ((int)lseek(fd, PAGE_SIZE*16, SEEK_SET) < 0)
                perror("lseek");
        else
                printf("lseek: Success.\n");

        if (write(fd, &x, sizeof(x)) < 0)
                perror("write");
        else
                printf("write: Success.\n");

        if ((int)(base = mmap(0, PAGE_SIZE*16, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) < 0)
                perror("mmap");
        else
                printf("mmap: Success: %p\n", base);

        *(unsigned int *)(base + PAGE_SIZE*2) = 0x1000;
        if (msync(base + PAGE_SIZE*2, PAGE_SIZE, MS_SYNC) < 0)
                perror("msync");
        else
                printf("msync: Success: %p\n", base);

        if (munmap(base + PAGE_SIZE*2, PAGE_SIZE) < 0)
                perror("munmap");
        else
                printf("munmap: Success: %p\n", base);
        *(unsigned int *)(base + PAGE_SIZE*3) = 0x1000;
        *(unsigned int *)(base + PAGE_SIZE*1) = 0x1000;

        return 0;
}