KCP Improving

native/kcp/laylink_kcp.c

@@ -164,6 +164,13 @@ void laylink_kcp_flush(laylink_kcp* session) {
     ikcp_flush(session->kcp);
 }
 
+int laylink_kcp_waitsnd(laylink_kcp* session) {
+    if (session == NULL || session->kcp == NULL) {
+        return 0;
+    }
+    return ikcp_waitsnd(session->kcp);
+}
+
 int laylink_kcp_pending_output_size(laylink_kcp* session) {
     if (session == NULL || session->output_head == NULL) {
         return 0;

native/kcp/laylink_kcp.h

@@ -19,6 +19,7 @@ unsigned int laylink_kcp_check(laylink_kcp* session, unsigned int current);
 int laylink_kcp_peeksize(laylink_kcp* session);
 int laylink_kcp_recv(laylink_kcp* session, char* buffer, int len);
 void laylink_kcp_flush(laylink_kcp* session);
+int laylink_kcp_waitsnd(laylink_kcp* session);
 int laylink_kcp_pending_output_size(laylink_kcp* session);
 int laylink_kcp_pop_output(laylink_kcp* session, char* buffer, int len);