esp-idf/components/esp_event/include/esp_event_base.h

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/*
* SPDX-FileCopyrightText: 2018-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
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#pragma once
#include <stdint.h>
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#ifdef __cplusplus
extern "C" {
#endif
// Defines for declaring and defining event base
#define ESP_EVENT_DECLARE_BASE(id) extern esp_event_base_t const id
#define ESP_EVENT_DEFINE_BASE(id) esp_event_base_t const id = #id
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// Event loop library types
typedef const char* esp_event_base_t; /**< unique pointer to a subsystem that exposes events */
typedef void* esp_event_loop_handle_t; /**< a number that identifies an event with respect to a base */
typedef void (*esp_event_handler_t)(void* event_handler_arg,
esp_event_base_t event_base,
int32_t event_id,
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void* event_data); /**< function called when an event is posted to the queue */
typedef void* esp_event_handler_instance_t; /**< context identifying an instance of a registered event handler */
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// Defines for registering/unregistering event handlers
#define ESP_EVENT_ANY_BASE NULL /**< register handler for any event base */
#define ESP_EVENT_ANY_ID -1 /**< register handler for any event id */
#ifdef __cplusplus
}
#endif