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system_api: return error on repeated registration of shutdown handler

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This commit is contained in:
Ivan Grokhotkov 2019-04-08 19:30:07 +08:00
parent bd309a133f
commit b1a722b2ca
2 changed files with 14 additions and 8 deletions
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17
components/esp32/system_api.c
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@ -211,14 +211,15 @@ esp_err_t esp_read_mac(uint8_t* mac, esp_mac_type_t type)
esp_err_t esp_register_shutdown_handler(shutdown_handler_t handler)
{
int i;
for (i = 0; i < SHUTDOWN_HANDLERS_NO; i++) {
if (shutdown_handlers[i] == NULL) {
shutdown_handlers[i] = handler;
return ESP_OK;
}
}
return ESP_FAIL;
for (int i = 0; i < SHUTDOWN_HANDLERS_NO; i++) {
if (shutdown_handlers[i] == handler) {
return ESP_ERR_INVALID_STATE;
} else if (shutdown_handlers[i] == NULL) {
shutdown_handlers[i] = handler;
return ESP_OK;
}
}
return ESP_ERR_NO_MEM;
}
esp_err_t esp_unregister_shutdown_handler(shutdown_handler_t handler)

5
components/esp_common/include/esp_system.h
View file

@ -80,6 +80,11 @@ typedef void (*shutdown_handler_t)(void);
*
* This function allows you to register a handler that gets invoked before
* the application is restarted using esp_restart function.
* @param handle function to execute on restart
* @return
* - ESP_OK on success
* - ESP_ERR_INVALID_STATE if the handler has already been registered
* - ESP_ERR_NO_MEM if no more shutdown handler slots are available
*/
esp_err_t esp_register_shutdown_handler(shutdown_handler_t handle);