#ifndef _SYS_MMAN_H
#define _SYS_MMAN_H

#include <stddef.h>
#include <sys/types.h> // for off_t

/* Address returned by mmap when it fails. */
#define MAP_FAILED (void*)-1

#define PROT_NONE 0
#define PROT_READ 1
#define PROT_WRITE 2

#define PAGE_SIZE 4096

#ifdef __cplusplus
extern "C"
{
#endif

    /* Maps size bytes of memory (rounded up to the nearest page-aligned size) into the current process's address
     * space at addr. If addr is null, the kernel will choose an address. */
    void* mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset);

    /* Unmaps size bytes of memory (rounded up to the nearest page-aligned size) at addr from the current process's
     * address space. */
    int munmap(void* addr, size_t size);

    /* Protects size bytes of memory according to the prot argument. */
    int mprotect(void* addr, size_t size, int prot);

#ifdef __cplusplus
}
#endif

#endif