esp-idf/components/esp32/event_loop.c

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3.0 KiB
C
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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed 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.
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "esp_err.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_event_loop.h"
#include "esp_task.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "freertos/semphr.h"
#include "esp_log.h"
#include "sdkconfig.h"
static const char* TAG = "event";
static bool s_event_init_flag = false;
static QueueHandle_t s_event_queue = NULL;
static system_event_cb_t s_event_handler_cb = NULL;
static void *s_event_ctx = NULL;
static esp_err_t esp_event_post_to_user(system_event_t *event)
{
if (s_event_handler_cb) {
return (*s_event_handler_cb)(s_event_ctx, event);
}
return ESP_OK;
}
static void esp_event_loop_task(void *pvParameters)
{
while (1) {
system_event_t evt;
if (xQueueReceive(s_event_queue, &evt, portMAX_DELAY) == pdPASS) {
esp_err_t ret = esp_event_process_default(&evt);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "default event handler failed!");
}
ret = esp_event_post_to_user(&evt);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "post event to user fail!");
}
}
}
}
system_event_cb_t esp_event_loop_set_cb(system_event_cb_t cb, void *ctx)
{
system_event_cb_t old_cb = s_event_handler_cb;
s_event_handler_cb = cb;
s_event_ctx = ctx;
return old_cb;
}
esp_err_t esp_event_send(system_event_t *event)
{
if (s_event_queue == NULL) {
ESP_LOGE(TAG, "Event loop not initialized via esp_event_loop_init, but esp_event_send called");
return ESP_ERR_INVALID_STATE;
}
portBASE_TYPE ret = xQueueSendToBack(s_event_queue, event, 0);
if (ret != pdPASS) {
if (event) {
ESP_LOGE(TAG, "e=%d f", event->event_id);
} else {
ESP_LOGE(TAG, "e null");
}
return ESP_FAIL;
}
return ESP_OK;
}
QueueHandle_t esp_event_loop_get_queue(void)
{
return s_event_queue;
}
esp_err_t esp_event_loop_init(system_event_cb_t cb, void *ctx)
{
if (s_event_init_flag) {
return ESP_FAIL;
}
s_event_handler_cb = cb;
s_event_ctx = ctx;
s_event_queue = xQueueCreate(CONFIG_SYSTEM_EVENT_QUEUE_SIZE, sizeof(system_event_t));
xTaskCreatePinnedToCore(esp_event_loop_task, "eventTask",
ESP_TASKD_EVENT_STACK, NULL, ESP_TASKD_EVENT_PRIO, NULL, 0);
s_event_init_flag = true;
return ESP_OK;
}