Fix changes in Zig 0.12 std lib

Signed-off-by: Francis Bouvier <francis@lightpanda.io>

src/main.zig

@@ -17,6 +17,7 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 const std = @import("std");
+const posix = std.posix;
 
 const jsruntime = @import("jsruntime");
 
@@ -31,6 +32,102 @@ pub const UserContext = apiweb.UserContext;
 
 const socket_path = "/tmp/browsercore-server.sock";
 
+// Inspired by std.net.StreamServer in Zig < 0.12
+pub const StreamServer = struct {
+    /// Copied from `Options` on `init`.
+    kernel_backlog: u31,
+    reuse_address: bool,
+    reuse_port: bool,
+    nonblocking: bool,
+
+    /// `undefined` until `listen` returns successfully.
+    listen_address: std.net.Address,
+
+    sockfd: ?posix.socket_t,
+
+    pub const Options = struct {
+        /// How many connections the kernel will accept on the application's behalf.
+        /// If more than this many connections pool in the kernel, clients will start
+        /// seeing "Connection refused".
+        kernel_backlog: u31 = 128,
+
+        /// Enable SO.REUSEADDR on the socket.
+        reuse_address: bool = false,
+
+        /// Enable SO.REUSEPORT on the socket.
+        reuse_port: bool = false,
+
+        /// Non-blocking mode.
+        nonblocking: bool = false,
+    };
+
+    /// After this call succeeds, resources have been acquired and must
+    /// be released with `deinit`.
+    pub fn init(options: Options) StreamServer {
+        return StreamServer{
+            .sockfd = null,
+            .kernel_backlog = options.kernel_backlog,
+            .reuse_address = options.reuse_address,
+            .reuse_port = options.reuse_port,
+            .nonblocking = options.nonblocking,
+            .listen_address = undefined,
+        };
+    }
+
+    /// Release all resources. The `StreamServer` memory becomes `undefined`.
+    pub fn deinit(self: *StreamServer) void {
+        self.close();
+        self.* = undefined;
+    }
+
+    pub fn listen(self: *StreamServer, address: std.net.Address) !void {
+        const sock_flags = posix.SOCK.STREAM | posix.SOCK.CLOEXEC;
+        var use_sock_flags: u32 = sock_flags;
+        if (self.nonblocking) use_sock_flags |= posix.SOCK.NONBLOCK;
+        const proto = if (address.any.family == posix.AF.UNIX) @as(u32, 0) else posix.IPPROTO.TCP;
+
+        const sockfd = try posix.socket(address.any.family, use_sock_flags, proto);
+        self.sockfd = sockfd;
+        errdefer {
+            posix.close(sockfd);
+            self.sockfd = null;
+        }
+
+        if (self.reuse_address) {
+            try posix.setsockopt(
+                sockfd,
+                posix.SOL.SOCKET,
+                posix.SO.REUSEADDR,
+                &std.mem.toBytes(@as(c_int, 1)),
+            );
+        }
+        if (@hasDecl(posix.SO, "REUSEPORT") and self.reuse_port) {
+            try posix.setsockopt(
+                sockfd,
+                posix.SOL.SOCKET,
+                posix.SO.REUSEPORT,
+                &std.mem.toBytes(@as(c_int, 1)),
+            );
+        }
+
+        var socklen = address.getOsSockLen();
+        try posix.bind(sockfd, &address.any, socklen);
+        try posix.listen(sockfd, self.kernel_backlog);
+        try posix.getsockname(sockfd, &self.listen_address.any, &socklen);
+    }
+
+    /// Stop listening. It is still necessary to call `deinit` after stopping listening.
+    /// Calling `deinit` will automatically call `close`. It is safe to call `close` when
+    /// not listening.
+    pub fn close(self: *StreamServer) void {
+        if (self.sockfd) |fd| {
+            posix.close(fd);
+            self.sockfd = null;
+            self.listen_address = undefined;
+        }
+    }
+};
+
 pub fn main() !void {
 
     // create v8 vm
@@ -53,13 +150,15 @@ pub fn main() !void {
 
     // server
     const addr = try std.net.Address.initUnix(socket_path);
-    var srv = std.net.StreamServer.init(.{
+    var srv = StreamServer.init(.{
         .reuse_address = true,
         .reuse_port = true,
-        .force_nonblocking = true,
+        .nonblocking = true,
     });
     defer srv.deinit();
+
     try srv.listen(addr);
+    defer srv.close();
     std.debug.print("Listening on: {s}...\n", .{socket_path});
 
     var browser = try Browser.init(arena.allocator(), vm);