feat(openthread): reorganize source file structure

components/openthread/private_include/esp_openthread_instance.h

@@ -0,0 +1,56 @@
+/*
+ * SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <stdbool.h>
+
+#include "openthread/instance.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Initialize OpenThread instance(s) for the selected build (single or multiple).
+ *
+ * @return true on success, false otherwise.
+ */
+bool esp_openthread_instances_init(void);
+
+/**
+ * @brief Finalize OpenThread instance(s) for the selected build (single or multiple).
+ *
+ * @param[in] instance  Instance provided by the caller (may be unused in multi-instance builds).
+ */
+void esp_openthread_instances_deinit(otInstance *instance);
+
+/**
+ * @brief Check whether tasklets are pending.
+ *
+ * @param[in] instance  Instance provided by the caller (may be unused in multi-instance builds).
+ */
+bool esp_openthread_tasklets_are_pending(otInstance *instance);
+
+/**
+ * @brief Process pending tasklets.
+ *
+ * @param[in] instance  Instance provided by the caller (may be unused in multi-instance builds).
+ */
+void esp_openthread_tasklets_process(otInstance *instance);
+
+/**
+ * @brief Initialize the NCP/RCP application for the selected instance mode.
+ *
+ * @param[in] instance  Instance provided by the caller (may be unused in multi-instance builds).
+ *
+ * @note Only used when CONFIG_OPENTHREAD_RADIO is enabled.
+ */
+void esp_openthread_ncp_app_init(otInstance *instance);
+
+#ifdef __cplusplus
+}
+#endif

components/openthread/src/esp_openthread.cpp

@@ -12,8 +12,8 @@
 #include "esp_openthread_common_macro.h"
 #include "esp_openthread_cli.h"
 #include "esp_openthread_dns64.h"
+#include "esp_openthread_instance.h"
 #include "esp_openthread_lock.h"
-#include "esp_openthread_ncp.h"
 #include "esp_openthread_netif_glue.h"
 #include "esp_openthread_platform.h"
 #include "esp_openthread_sleep.h"
@@ -26,7 +26,6 @@
 #include "openthread/instance.h"
 #include "openthread/logging.h"
 #include "openthread/netdata.h"
-#include "openthread/tasklet.h"
 #include "openthread/thread.h"
 
 #if CONFIG_OPENTHREAD_FTD
@@ -81,7 +80,7 @@ esp_err_t esp_openthread_init(const esp_openthread_platform_config_t *config)
                         "Failed to initialize OpenThread platform driver");
     esp_openthread_lock_acquire(portMAX_DELAY);
     esp_err_t ret = ESP_OK;
-    ESP_GOTO_ON_FALSE(otInstanceInitSingle() != NULL, ESP_FAIL, exit, OT_PLAT_LOG_TAG,
+    ESP_GOTO_ON_FALSE(esp_openthread_instances_init(), ESP_FAIL, exit, OT_PLAT_LOG_TAG,
                       "Failed to initialize OpenThread instance");
 #if CONFIG_OPENTHREAD_DNS64_CLIENT
     ESP_GOTO_ON_ERROR(esp_openthread_dns64_client_init(), exit, OT_PLAT_LOG_TAG,
@@ -203,7 +202,7 @@ esp_err_t esp_openthread_launch_mainloop(void)
 
         esp_openthread_lock_acquire(portMAX_DELAY);
         esp_openthread_platform_update(&mainloop);
-        if (otTaskletsArePending(instance)) {
+        if (esp_openthread_tasklets_are_pending(instance)) {
             mainloop.timeout.tv_sec = 0;
             mainloop.timeout.tv_usec = 0;
         }
@@ -222,9 +221,7 @@ esp_err_t esp_openthread_launch_mainloop(void)
         if (result >= 0) {
             esp_openthread_lock_acquire(portMAX_DELAY);
             error = esp_openthread_platform_process(instance, &mainloop);
-            while (otTaskletsArePending(instance)) {
-                otTaskletsProcess(instance);
-            }
+            esp_openthread_tasklets_process(instance);
             esp_openthread_lock_release();
             if (error != ESP_OK) {
                 ESP_LOGE(OT_PLAT_LOG_TAG, "esp_openthread_platform_process failed");
@@ -244,7 +241,7 @@ esp_err_t esp_openthread_launch_mainloop(void)
 
 esp_err_t esp_openthread_deinit(void)
 {
-    otInstanceFinalize(esp_openthread_get_instance());
+    esp_openthread_instances_deinit(esp_openthread_get_instance());
     return esp_openthread_platform_deinit();
 }
 
@@ -271,7 +268,7 @@ static void ot_task_worker(void *aContext)
 #endif // CONFIG_OPENTHREAD_CLI
 
 #if CONFIG_OPENTHREAD_RADIO
-    otAppNcpInit(esp_openthread_get_instance());
+    esp_openthread_ncp_app_init(esp_openthread_get_instance());
 #endif
     xSemaphoreGive(s_ot_syn_semaphore);
 

components/openthread/src/esp_openthread_instance.cpp

@@ -0,0 +1,47 @@
+/*
+ * SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "sdkconfig.h"
+#include "core/instance/instance.hpp"
+#include "esp_openthread.h"
+#include "esp_openthread_instance.h"
+#include "esp_openthread_ncp.h"
+#include "openthread/instance.h"
+#include "openthread/tasklet.h"
+
+bool esp_openthread_instances_init(void)
+{
+    return otInstanceInitSingle() != NULL;
+}
+
+void esp_openthread_instances_deinit(otInstance *instance)
+{
+    otInstanceFinalize(instance);
+}
+
+bool esp_openthread_tasklets_are_pending(otInstance *instance)
+{
+    return otTaskletsArePending(instance);
+}
+
+void esp_openthread_tasklets_process(otInstance *instance)
+{
+    while (otTaskletsArePending(instance)) {
+        otTaskletsProcess(instance);
+    }
+}
+
+#if CONFIG_OPENTHREAD_RADIO
+void esp_openthread_ncp_app_init(otInstance *instance)
+{
+    otAppNcpInit(instance);
+}
+#endif
+
+otInstance *esp_openthread_get_instance(void)
+{
+    return (otInstance *)&ot::Instance::Get();
+}

components/openthread/src/esp_openthread_platform.cpp

@@ -23,7 +23,6 @@
 #include "esp_partition.h"
 #include "common/code_utils.hpp"
 #include "common/logging.hpp"
-#include "core/instance/instance.hpp"
 #include "freertos/FreeRTOS.h"
 #include "freertos/queue.h"
 #include "openthread/cli.h"
@@ -175,11 +174,6 @@ exit:
     return ret;
 }
 
-otInstance *esp_openthread_get_instance(void)
-{
-    return (otInstance *)&ot::Instance::Get();
-}
-
 esp_err_t esp_openthread_platform_deinit(void)
 {
     ESP_RETURN_ON_FALSE(s_openthread_platform_initialized, ESP_ERR_INVALID_STATE, OT_PLAT_LOG_TAG,