Type Definition libnghttp2_sys::nghttp2_on_frame_not_send_callback

pub type nghttp2_on_frame_not_send_callback = Option<unsafe extern "C" fn(session: *mut nghttp2_session, frame: *const nghttp2_frame, lib_error_code: c_int, user_data: *mut c_void) -> c_int>;

@functypedef

Callback function invoked after the non-DATA frame |frame| is not sent because of the error. The error is indicated by the |lib_error_code|, which is one of the values defined in :type:nghttp2_error. The |user_data| pointer is the third argument passed in to the call to nghttp2_session_client_new() or nghttp2_session_server_new().

The implementation of this function must return 0 if it succeeds. If nonzero is returned, it is treated as fatal error and nghttp2_session_send() and nghttp2_session_mem_send() functions immediately return :enum:NGHTTP2_ERR_CALLBACK_FAILURE.

nghttp2_session_get_stream_user_data() can be used to get associated data.

To set this callback to :type:nghttp2_session_callbacks, use nghttp2_session_callbacks_set_on_frame_not_send_callback().