ev: log aio backend

CMakeLists.txt

@@ -865,6 +865,13 @@ CHECK_INCLUDE_FILE(uv-version.h LWS_HAVE_UV_VERSION_H)
   endif()
 endif()
 
+if (LWS_WITH_LIBEV)
+	CHECK_C_SOURCE_COMPILES(
+        "#include <ev.h>
+        int main(int argc, char **argv) { return EVBACKEND_LINUXAIO; }
+        " LWS_HAVE_EVBACKEND_LINUXAIO)
+endif()
+
 
 if (LWS_WITH_ZLIB AND NOT LWS_WITH_BUNDLED_ZLIB)
 	if (LWS_WITH_MINIZ)

cmake/lws_config.h.in

@@ -100,6 +100,7 @@
 #cmakedefine LWS_WITH_DEPRECATED_LWS_DLL
 #cmakedefine LWS_WITH_DIR
 #cmakedefine LWS_WITH_ESP32
+#cmakedefine LWS_HAVE_EVBACKEND_LINUXAIO
 #cmakedefine LWS_WITH_EXTERNAL_POLL
 #cmakedefine LWS_WITH_FTS
 #cmakedefine LWS_WITH_GENCRYPTO

lib/event-libs/libev/libev.c

@@ -175,6 +175,11 @@ elops_init_pt_ev(struct lws_context *context, void *_loop, int tsi)
 	case EVBACKEND_EPOLL:
 		backend_name = "epoll";
 		break;
+#if defined(LWS_HAVE_EVBACKEND_LINUXAIO)
+       case EVBACKEND_LINUXAIO:
+               backend_name = "Linux AIO";
+               break;
+#endif
 	case EVBACKEND_KQUEUE:
 		backend_name = "kqueue";
 		break;