message: Add coro_check in util.
diff: @@ -578,6 +578,8 @@ static void aio_onWriteFileCompleted(swAio_event *event)
  static PHP_METHOD(swoole_coroutine_util, fread)
  {
  + coro_check(TSRMLS_C);
  +
  zval *handle;
  zend_long length = 0;
  @@ -653,6 +655,8 @@ static PHP_METHOD(swoole_coroutine_util, fread)
  static PHP_METHOD(swoole_coroutine_util, fgets)
  {
  + coro_check(TSRMLS_C);
  +
  zval *handle;
  php_stream *stream;
  @@ -722,6 +726,8 @@ static PHP_METHOD(swoole_coroutine_util, fgets)
  static PHP_METHOD(swoole_coroutine_util, fwrite)
  {
  + coro_check(TSRMLS_C);
  +
  zval *handle;
  char *str;
  zend_size_t l_str;
  @@ -794,6 +800,8 @@ static PHP_METHOD(swoole_coroutine_util, fwrite)
  static PHP_METHOD(swoole_coroutine_util, readFile)
  {
  + coro_check(TSRMLS_C);
  +
  char *filename = NULL;
  size_t l_filename = 0;
  @@ -843,6 +851,8 @@ static PHP_METHOD(swoole_coroutine_util, readFile)
  static PHP_METHOD(swoole_coroutine_util, writeFile)
  {
  + coro_check(TSRMLS_C);
  +
  char *filename = NULL;
  size_t l_filename = 0;
  char *data = NULL;
  @@ -1001,6 +1011,8 @@ static void coro_dns_onGetaddrinfoCompleted(swAio_event *event)
  static PHP_METHOD(swoole_coroutine_util, gethostbyname)
  {
  + coro_check(TSRMLS_C);
  +
  char *domain_name;
  zend_size_t l_domain_name;
  long family = AF_INET;
  @@ -1069,6 +1081,8 @@ static PHP_METHOD(swoole_coroutine_util, gethostbyname)
  static PHP_METHOD(swoole_coroutine_util, getaddrinfo)
  {
  + coro_check(TSRMLS_C);
  +
  char *hostname;
  zend_size_t l_hostname;
  long family = AF_INET;
  