thread.zig

const std = @import("std");
const debugPrint = std.debug.print;
const Thread = std.Thread;
const Mutex = Thread.Mutex;

fn hoge(m: *Mutex, val: *u32) void {
    const ret: u32 = val.* * 2;
    {
        m.lock();
        defer m.unlock();
        debugPrint("ret = 0x{x}\n", .{ret});
        val.* = ret;
    }
    return;
}

pub fn main() !void {
    var m: Mutex = undefined;
    var ahi: u32 = 0xdead;

    const thread = try Thread.spawn(.{}, hoge, .{ &m, &ahi });
    thread.join();
}