Don't use multi threading where it is not required

src/saprus.zig

@@ -79,13 +79,15 @@ pub fn sendInitialConnection(payload: []const u8, initial_port: u16, allocator:
     return msg;
 }
 
-var setting_up_socket: std.Thread.Semaphore = std.Thread.Semaphore{};
+pub fn connect(payload: []const u8, allocator: Allocator) !?SaprusMessage {
+    var initial_port: u16 = 0;
+    if (rand) |r| {
+        initial_port = r.intRangeAtMost(u16, 1024, 65000);
+    } else unreachable;
+
+    var initial_conn_res: ?SaprusMessage = null;
+    errdefer if (initial_conn_res) |c| c.deinit(allocator);
 
-fn awaitSentinelConnectionResponse(
-    res: *?SaprusMessage,
-    err: *?anyerror,
-    allocator: Allocator,
-) !void {
     var sock = try network.Socket.create(.ipv4, .udp);
     defer sock.close();
 
@@ -99,47 +101,13 @@ fn awaitSentinelConnectionResponse(
     try sock.setReadTimeout(1_000_000);
     try sock.bind(bind_addr);
 
-    // Signal that the socket is ready to receive data.
-    setting_up_socket.post();
-
-    var response_buf: [4096]u8 = undefined;
-
-    _ = try sock.receive(&response_buf);
-    const len = sock.receive(&response_buf) catch |e| {
-        err.* = e;
-        return;
-    };
-
-    res.* = try SaprusMessage.fromBytes(response_buf[0..len], allocator);
-}
-
-pub fn connect(payload: []const u8, allocator: Allocator) !?SaprusMessage {
-    var initial_port: u16 = 0;
-    if (rand) |r| {
-        initial_port = r.intRangeAtMost(u16, 1024, 65000);
-    } else unreachable;
-
-    var err: ?anyerror = null;
-    var initial_conn_res: ?SaprusMessage = null;
-    errdefer if (initial_conn_res) |c| c.deinit(allocator);
-
-    const response_thread = try std.Thread.spawn(
-        .{},
-        awaitSentinelConnectionResponse,
-        .{
-            &initial_conn_res,
-            &err,
-            allocator,
-        },
-    );
-
-    // Block until the socket is set up.
-    try setting_up_socket.timedWait(5 * 1000 * 1000 * 1000 * 1000);
-
     const msg = try sendInitialConnection(payload, initial_port, allocator);
 
-    // Await response from the sentinel
+    var response_buf: [4096]u8 = undefined;
-    response_thread.join();
+    _ = try sock.receive(&response_buf);
+    const len = try sock.receive(&response_buf);
+
+    initial_conn_res = try SaprusMessage.fromBytes(response_buf[0..len], allocator);
 
     // Complete handshake after awaiting response
     try broadcastSaprusMessage(msg, randomPort(), allocator);