[GitHub] [nuttx-apps] pkarashchenko commented on a diff in pull request #1585: lvgl/port: add libuv porting

["pkarashchenko (via GitHub)" <gi...@apache.org>]

pkarashchenko commented on code in PR #1585:
URL: https://github.com/apache/nuttx-apps/pull/1585#discussion_r1113965614


##########
graphics/lvgl/port/lv_port_libuv.c:
##########
@@ -0,0 +1,175 @@
+/****************************************************************************
+ * apps/graphics/lvgl/port/lv_port_libuv.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <uv.h>
+#include <stdlib.h>
+#include <lvgl/lvgl.h>
+#include "lv_port_libuv.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+struct lv_uv_ctx_s
+{
+  int fd;
+  uv_timer_t ui_timer;
+  uv_poll_t ui_refr;
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct lv_uv_ctx_s g_uv_ctx;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: ui_timer_cb
+ ****************************************************************************/
+
+static void ui_timer_cb(FAR uv_timer_t *handle)
+{
+  uint32_t sleep_ms;
+  LV_LOG_TRACE("start");
+
+  sleep_ms = lv_timer_handler();
+
+  /* Prevent busy loops. */
+
+  if (sleep_ms == 0)
+    {
+      sleep_ms = 1;
+    }
+
+  uv_timer_start(handle, ui_timer_cb, sleep_ms, 0);
+  LV_LOG_TRACE("stop, sleep %" PRIu32 " ms", sleep_ms);
+}
+
+/****************************************************************************
+ * Name: ui_refr_cb
+ ****************************************************************************/
+
+static void ui_refr_cb(FAR uv_poll_t *handle, int status, int events)
+{
+  LV_LOG_TRACE("start");
+  _lv_disp_refr_timer(NULL);
+  LV_LOG_TRACE("stop");
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lv_port_libuv_init
+ *
+ * Description:
+ *   Add the UI event loop to the uv_loop.
+ *
+ * Input Parameters:
+ *   loop - Pointer to uv_loop.
+ *
+ ****************************************************************************/
+
+void lv_port_libuv_init(FAR void *loop)
+{
+  int fd;
+  FAR uv_loop_t *ui_loop = loop;
+  FAR lv_disp_t *disp;
+
+  LV_LOG_INFO("dev: " CONFIG_LV_PORT_UV_POLL_DEVICEPATH " opening...");
+  fd = open(CONFIG_LV_PORT_UV_POLL_DEVICEPATH, O_WRONLY);
+

Review Comment:
   ```suggestion
   ```



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