The issue was the writer is not working to send pong ??

src/server/client.zig

@@ -4,21 +4,18 @@ const std = @import("std");
 pub const ClientState = struct {
     id: usize,
     connect: Message.AllocatedConnect,
-    /// Messages that this client is trying to send.
-    send_queue: std.Io.Queue(Message),
-    send_queue_buffer: [1024]Message = undefined,
+
     /// Messages that this client should receive.
     recv_queue: std.Io.Queue(Message),
     recv_queue_buffer: [1024]Message = undefined,
 
-    io_group: std.Io.Group = .init,
-
     from_client: *std.Io.Reader,
     to_client: *std.Io.Writer,
 
+    task: std.Io.Future(void),
+
     pub fn init(
         io: std.Io,
-        allocator: std.mem.Allocator,
         id: usize,
         connect: Message.AllocatedConnect,
         in: *std.Io.Reader,
@@ -27,15 +24,13 @@ pub const ClientState = struct {
         var res: ClientState = .{
             .id = id,
             .connect = connect,
-            .send_queue = undefined,
             .recv_queue = undefined,
             .from_client = in,
             .to_client = out,
+            .task = undefined,
         };
-        res.send_queue = .init(&res.send_queue_buffer);
         res.recv_queue = .init(&res.recv_queue_buffer);
-        try res.io_group.concurrent(io, processWrite, .{ &res, io, out });
-        try res.io_group.concurrent(io, processRead, .{ &res, io, allocator, in });
+        res.task = try io.concurrent(processWrite, .{ &res, io, out });
 
         return res;
     }
@@ -47,6 +42,7 @@ pub const ClientState = struct {
     ) void {
         while (true) {
             const message = self.recv_queue.getOne(io) catch continue;
+            std.debug.print("got message in write loop to send to client: {any}\n", .{message});
             switch (message) {
                 .@"+ok" => {
                     writeOk(out) catch break;
@@ -67,63 +63,23 @@ pub const ClientState = struct {
         }
     }
 
-    fn processRead(
-        self: *ClientState,
-        io: std.Io,
-        allocator: std.mem.Allocator,
-        in: *std.Io.Reader,
-    ) void {
-        // io.sleep(.fromMilliseconds(100), .real) catch @panic("couldn't sleep");
-        while (true) {
-            // std.debug.print("waiting for message\n", .{});
-            const next_message = Message.next(allocator, in) catch |err| switch (err) {
-                error.EndOfStream => {
-                    self.send_queue.putOne(io, .eos) catch {};
-                    break;
-                },
-                else => {
-                    std.debug.panic("guh: {any}\n", .{err});
-                    break;
-                },
-            };
-            std.debug.print("next_message: {any}\n", .{next_message});
-
-            switch (next_message) {
-                .eos => {
-                    self.send_queue.putOne(io, next_message) catch {};
-                    break;
-                },
-                else => {
-                    self.send_queue.putOne(io, next_message) catch break;
-                },
-            }
-        }
-
-        std.debug.print("no more messages\n", .{});
-    }
-
-    pub fn deinit(self: *ClientState, alloc: std.mem.Allocator) void {
-        _ = self;
-        // self.write_task.cancel() catch {
-        //     std.debug.print("failed to cancel write task of {}\n", .{self.id});
-        // };
-        // self.read_taks.cancel() catch {
-        //     std.debug.print("failed to cancel read task of {}\n", .{self.id});
-        // };
-        // TODO: dealloc things.
-        _ = alloc;
+    pub fn deinit(self: *ClientState, io: std.Io) void {
+        self.task.cancel(io);
+        self.connect.deinit();
     }
 
     /// Return true if the value was put in the clients buffer to process, else false.
     pub fn send(self: *ClientState, io: std.Io, msg: Message) std.Io.Cancelable!bool {
-        return (try self.recv_queue.put(io, &.{msg}, 0)) > 0;
+        try self.recv_queue.putOne(io, msg);
+        return true;
     }
 
-    pub fn next(self: *ClientState, io: std.Io) !Message {
-        std.debug.print("in client awaiting next message\n", .{});
-        errdefer std.debug.print("actually it was canceled\n", .{});
-        defer std.debug.print("client returning next message!\n", .{});
-        return self.send_queue.getOne(io);
+    pub fn next(self: *ClientState, allocator: std.mem.Allocator) !Message {
+        // std.debug.print("in client awaiting next message\n", .{});
+        // errdefer std.debug.print("actually it was canceled\n", .{});
+        // defer std.debug.print("client returning next message!\n", .{});
+        return Message.next(allocator, self.from_client);
+        // return self.send_queue.getOne(io);
     }
 };
 
@@ -132,10 +88,12 @@ fn writeOk(out: *std.Io.Writer) !void {
     try out.flush();
 }
 
-fn writePong(out: *std.Io.Writer) !void {
+pub fn writePong(out: *std.Io.Writer) !void {
     std.debug.print("writing pong\n", .{});
-    _ = try out.write("PONG\r\n");
-    try out.flush();
+    for (0..10000) |_| {
+        _ = try out.write("PONG\r\n");
+        try out.flush();
+    }
 }
 
 pub fn writeInfo(out: *std.Io.Writer, info: Message.ServerInfo) !void {