memory.c

#include "memory.h"

char* map_shared_mem()
{
    int fd;
    char *memaddr;

    fd = open("/dev/mem", O_RDWR);

    if (fd == -1)
    {
        printf("can not access /dev/mem\n" );
        return NULL;
    }

    memaddr =
    (char *)mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, SHMADDR);
    if (memaddr == MAP_FAILED)
    {
        printf("mmap failed\n" );
        return NULL;
    }
    return memaddr;
}

int write_shared_mem(char* memaddr, packet_t packet)
{
    *memaddr = 0xFF;
    memcpy(*(memaddr + 1), packet.data, packet.len);
    return 0;
}

int shared_mem_loop(queue_t* queue)
{
    
}