Luna/libc/src/sys/mman.cpp

#include <bits/errno-return.h>
#include <bits/mmap.h>
#include <fcntl.h>
#include <luna/Heap.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <unistd.h>

extern "C"
{
    void* mmap(void* addr, size_t len, int prot, int flags, int fd, off_t offset)
    {
        const mmap_params params { addr, len, prot, flags, fd, offset };
        long rc = syscall(SYS_mmap, &params);
        __errno_return(rc, void*);
    }

    int munmap(void* addr, size_t len)
    {
        long rc = syscall(SYS_munmap, addr, len);
        __errno_return(rc, int);
    }

    int msync(void* addr, size_t len, int)
    {
        long rc = syscall(SYS_msync, addr, len);
        __errno_return(rc, int);
    }

    int shm_open(const char* name, int oflag, mode_t mode)
    {
        char buf[BUFSIZ];
        snprintf(buf, sizeof(buf), "/dev/shm%s", name);
        return open(buf, oflag | O_CLOEXEC, mode);
    }

    int shm_unlink(const char* name)
    {
        char buf[BUFSIZ];
        snprintf(buf, sizeof(buf), "/dev/shm%s", name);
        return unlink(buf);
    }
}