Ever wanted a zig allocator that could allocate all the free space of your HDD? Look no further! Really though, don't. Unless you have a specific need for this, you likely don't need it ;)

I created this allocator (POSIX systems only right now) for the purpose of single, very large allocations. Think lots and lots of math with hundreds of gigabytes in each array.

const std = @import("std");
const Allocator = std.mem.Allocator;
const Falloc = @import("Falloc");

pub fn main() !void {
    const gpa: Allocator = Falloc.allocator;
    // 256 GiB (may take a while, look at disk IO for your progress bar lol)
    const mem = try gpa.alloc(u8, 1 << 38);
    defer gpa.free(mem);

    // In a real-world use case scenario, this would be better utilized.
    const hello = "Hello, World!\n";
    @memcpy(mem[0..hello.len], hello);
    std.debug.print("{s}", .{mem[0..hello.len]});
}