async: remove context from loop impl init

src/async/tcp.zig

@@ -42,23 +42,20 @@ pub const Conn = struct {
     loop: *Loop,
 
     pub fn connect(self: *Conn, socket: std.os.socket_t, address: std.net.Address) !void {
-        var cmd = Command{ .impl = undefined };
-        cmd.impl = NetworkImpl.init(self.loop, &cmd);
-        cmd.impl.connect(socket, address);
+        var cmd = Command{ .impl = NetworkImpl.init(self.loop) };
+        cmd.impl.connect(&cmd, socket, address);
         _ = try cmd.wait();
     }
 
     pub fn send(self: *Conn, socket: std.os.socket_t, buffer: []const u8) !usize {
-        var cmd = Command{ .impl = undefined };
-        cmd.impl = NetworkImpl.init(self.loop, &cmd);
-        cmd.impl.send(socket, buffer);
+        var cmd = Command{ .impl = NetworkImpl.init(self.loop) };
+        cmd.impl.send(&cmd, socket, buffer);
         return try cmd.wait();
     }
 
     pub fn receive(self: *Conn, socket: std.os.socket_t, buffer: []u8) !usize {
-        var cmd = Command{ .impl = undefined };
-        cmd.impl = NetworkImpl.init(self.loop, &cmd);
-        cmd.impl.receive(socket, buffer);
+        var cmd = Command{ .impl = NetworkImpl.init(self.loop) };
+        cmd.impl.receive(&cmd, socket, buffer);
         return try cmd.wait();
     }
 };

src/async/test.zig

@@ -77,11 +77,10 @@ const AsyncClient = struct {
 
         pub fn deinit(self: *AsyncRequest) void {
             self.headers.deinit();
-            self.cli.allocator.destroy(self);
         }
 
         pub fn fetch(self: *AsyncRequest) void {
-            return self.impl.yield();
+            return self.impl.yield(self);
         }
 
         fn onerr(self: *AsyncRequest, err: anyerror) void {
@@ -118,16 +117,13 @@ const AsyncClient = struct {
         self.cli.deinit();
     }
 
-    pub fn create(self: *AsyncClient, uri: std.Uri) !*AsyncRequest {
-        var req = try self.cli.allocator.create(AsyncRequest);
-        req.* = AsyncRequest{
-            .impl = undefined,
+    pub fn create(self: *AsyncClient, uri: std.Uri) !AsyncRequest {
+        return .{
+            .impl = YieldImpl.init(self.cli.loop),
             .cli = &self.cli,
             .uri = uri,
             .headers = .{ .allocator = self.cli.allocator, .owned = false },
         };
-        req.impl = YieldImpl.init(self.cli.loop, req);
-        return req;
     }
 };
 
@@ -140,7 +136,7 @@ test "non blocking client" {
     var client = AsyncClient.init(alloc, &loop);
     defer client.deinit();
 
-    var reqs: [10]*AsyncClient.AsyncRequest = undefined;
+    var reqs: [10]AsyncClient.AsyncRequest = undefined;
     for (0..reqs.len) |i| {
         reqs[i] = try client.create(try std.Uri.parse(url));
         reqs[i].fetch();

src/xhr/xhr.zig

@@ -98,23 +98,17 @@ pub const XMLHttpRequest = struct {
     asyn: bool = true,
     err: ?anyerror = null,
 
-    pub fn constructor(alloc: std.mem.Allocator, loop: *Loop) !*XMLHttpRequest {
-        var req = try alloc.create(XMLHttpRequest);
-        req.* = XMLHttpRequest{
+    pub fn constructor(alloc: std.mem.Allocator, loop: *Loop) !XMLHttpRequest {
+        return .{
             .proto = try XMLHttpRequestEventTarget.constructor(),
             .headers = .{ .allocator = alloc, .owned = false },
-            .impl = undefined,
+            .impl = YieldImpl.init(loop),
             .url = null,
             .uri = undefined,
             .readyState = UNSENT,
             // TODO retrieve the HTTP client globally to reuse existing connections.
-            .cli = .{
-                .allocator = alloc,
-                .loop = loop,
-            },
+            .cli = .{ .allocator = alloc, .loop = loop },
         };
-        req.impl = YieldImpl.init(loop, req);
-        return req;
     }
 
     pub fn deinit(self: *XMLHttpRequest, alloc: std.mem.Allocator) void {
@@ -123,7 +117,6 @@ pub const XMLHttpRequest = struct {
         if (self.url) |url| alloc.free(url);
         // TODO the client must be shared between requests.
         self.cli.deinit();
-        alloc.destroy(self);
     }
 
     pub fn get_readyState(self: *XMLHttpRequest) u16 {
@@ -176,7 +169,7 @@ pub const XMLHttpRequest = struct {
     }
 
     pub fn _send(self: *XMLHttpRequest) void {
-        self.impl.yield();
+        self.impl.yield(self);
     }
 
     fn onerr(self: *XMLHttpRequest, err: anyerror) void {