testmmap.zig

const std = @import("std");
const os = std.os;
const page_size = std.mem.page_size;

pub fn main() !void {
    const len = 32;
    const perms = os.PROT_READ | os.PROT_WRITE;
    const flags = os.MAP_PRIVATE | os.MAP_ANONYMOUS;

    const ptr = try os.mmap(null, len, perms, flags, -1, 0);
    std.debug.warn("{*}\n", ptr.ptr);
    os.munmap(ptr);

    const ptr2 = try os.mmap(null, len, perms, flags, -1, 0);
    std.debug.warn("{*}\n", ptr2.ptr);
    os.munmap(ptr2);

    const hint = ptr2.ptr + page_size;
    const ptr3 = try os.mmap(hint, len, perms, flags, -1, 0);
    std.debug.warn("{*}\n", ptr3.ptr);
    os.munmap(ptr3);
}