refactoring

Co-authored-by: n.fedorov <mail@nfedorov.dev>
Co-committed-by: n.fedorov <mail@nfedorov.dev>

include/nxst/infra/net/socket.hpp

@@ -0,0 +1,29 @@
+#pragma once
+#include <unistd.h>
+
+struct Socket {
+    int fd = -1;
+
+    Socket() = default;
+    explicit Socket(int fd) : fd(fd) {}
+    ~Socket() {
+        if (fd >= 0)
+            close(fd);
+    }
+
+    Socket(const Socket&) = delete;
+    Socket& operator=(const Socket&) = delete;
+    Socket(Socket&& o) : fd(o.fd) {
+        o.fd = -1;
+    }
+
+    operator int() const {
+        return fd;
+    }
+    bool valid() const {
+        return fd >= 0;
+    }
+    void release() {
+        fd = -1;
+    }
+};