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SourceVuESP-IDF Framework and ExamplesESP-IDFesp_event_is_handler_registered()

esp_event_is_handler_registered() function

Searches handlers registered with an event loop to see if it has been registered.

Syntax

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Summary

Declaration

Definition

from esp_event_private.h:32

bool esp_event_is_handler_registered(esp_event_loop_handle_t event_loop, esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler);

Implemented in esp_event_private.c:12

Arguments

Argument

Description

event_loop

the loop to search

event_base

the event base to search

event_id

the event id to search

event_handler

the event handler to look for

Return value

true handler registered false handler not registered - true: Handler registered - false: Handler not registered

References

Code

Location

bool esp_event_is_handler_registered(esp_event_loop_handle_t event_loop, esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler)

esp_event_private.c:12

bool esp_event_is_handler_registered(esp_event_loop_handle_t event_loop, esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler);

esp_event_private.h:32

Call Tree

esp_event_is_handler_registered() calls 1 function:

esp_event_is_handler_registered()

xQueueGenericSend()

Data Use

esp_event_is_handler_registered() reads 15 variables:

esp_event_handler_context::handler

esp_event_handler_node::handler_ctx

esp_event_handler_node::next

esp_event_id_node::id

esp_event_id_node::handlers

esp_event_id_node::next

esp_event_base_node::base

esp_event_base_node::handlers

esp_event_base_node::id_nodes

esp_event_base_node::next

esp_event_loop_node::handlers

esp_event_loop_node::base_nodes

esp_event_loop_node::next

esp_event_loop_instance::mutex

esp_event_loop_instance::loop_nodes

esp_event_is_handler_registered()

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