Fix the compilation error of IOURing futex on the Ubuntu 24.04

Author: matyhtf

include/swoole_iouring.h

@@ -14,20 +14,13 @@
   +----------------------------------------------------------------------+
 */
 
-#ifndef SWOOLE_SRC_SWOOLE_IOURING_H
-#define SWOOLE_SRC_SWOOLE_IOURING_H
+#pragma once
 
 #include "swoole_coroutine.h"
 
 #ifdef SW_USE_IOURING
 #include <liburing.h>
 
-#ifdef HAVE_IOURING_FUTEX
-#ifndef FUTEX2_SIZE_U32
-#define FUTEX2_SIZE_U32 0x02
-#endif
-#endif
-
 using swoole::Coroutine;
 
 enum swIouringFlag {
@@ -99,4 +92,3 @@ class Iouring {
 };
 };  // namespace swoole
 #endif
-#endif

src/coroutine/iouring.cc

@@ -19,6 +19,13 @@
 
 #include "swoole_iouring.h"
 
+#ifdef HAVE_IOURING_FUTEX
+#ifndef FUTEX2_SIZE_U32
+#define FUTEX2_SIZE_U32 0x02
+#endif
+#include <linux/futex.h>
+#endif
+
 #ifdef SW_USE_IOURING
 using swoole::Coroutine;