OVMS3-idf/components/esp_event/esp_event.c

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2018-10-26 05:14:19 +00:00
// Copyright 2018 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 <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
#include "esp_log.h"
#include "esp_event.h"
#include "esp_event_internal.h"
#include "esp_event_private.h"
#ifdef CONFIG_EVENT_LOOP_PROFILING
#include "esp_timer.h"
#endif
/* ---------------------------- Definitions --------------------------------- */
#ifdef CONFIG_EVENT_LOOP_PROFILING
// loop@<address,name> rx:<total_recieved> dr:<total_dropped> inv:<total_number_of_invocations> run:<total_runtime>
#define LOOP_DUMP_FORMAT "loop@%p,%s rx:%u dr:%u inv:%u run:%lld us\n"
// event@<base:id> proc:<total_processed> run:<total_runtime>
#define EVENT_DUMP_FORMAT "\tevent@%s:%d proc:%u run:%lld us\n"
// handler@<address> inv:<total_invoked> run:<total_runtime>
#define HANDLER_DUMP_FORMAT "\t\thandler@%p inv:%u run:%lld us\n"
#define PRINT_DUMP_INFO(dst, sz, ...) do { \
int cb = snprintf(dst, sz, __VA_ARGS__); \
dst += cb; \
sz -= cb; \
} while(0);
#endif
/* ------------------------- Static Variables ------------------------------- */
static const char* TAG = "event";
static const char* esp_event_any_base = "any";
#ifdef CONFIG_EVENT_LOOP_PROFILING
static SLIST_HEAD(esp_event_loop_instance_list_t, esp_event_loop_instance) s_event_loops =
SLIST_HEAD_INITIALIZER(s_event_loops);
static portMUX_TYPE s_event_loops_spinlock = portMUX_INITIALIZER_UNLOCKED;
#endif
/* ------------------------- Static Functions ------------------------------- */
#ifdef CONFIG_EVENT_LOOP_PROFILING
static int esp_event_dump_prepare()
{
esp_event_loop_instance_t* loop_it;
esp_event_base_instance_t* base_it;
esp_event_id_instance_t* id_it;
esp_event_handler_instance_t* handler_it;
// Count the number of items to be printed. This is needed to compute how much memory to reserve.
int loops = 0, events = 0, handlers = 0;
portENTER_CRITICAL(&s_event_loops_spinlock);
SLIST_FOREACH(loop_it, &s_event_loops, loop_entry) {
SLIST_FOREACH(handler_it, &(loop_it->loop_handlers), handler_entry) {
handlers++;
}
SLIST_FOREACH(base_it, &(loop_it->event_bases), event_base_entry) {
SLIST_FOREACH(handler_it, &(base_it->base_handlers), handler_entry) {
handlers++;
}
// Print event-level handlers
SLIST_FOREACH(id_it, &(base_it->event_ids), event_id_entry) {
SLIST_FOREACH(handler_it, &(id_it->handlers), handler_entry) {
handlers++;
}
events++;
}
events++;
}
events++;
loops++;
}
portEXIT_CRITICAL(&s_event_loops_spinlock);
// Reserve slightly more memory than computed
int allowance = 3;
int size = (((loops + allowance) * (sizeof(LOOP_DUMP_FORMAT) + 10 + 20 + 3 * 11 + 20 )) +
((events + allowance) * (sizeof(EVENT_DUMP_FORMAT) + 10 + 20 + 11 + 20)) +
((handlers + allowance) * (sizeof(HANDLER_DUMP_FORMAT) + 10 + 11 + 20)));
return size;
}
#endif
static void esp_event_loop_run_task(void* args)
{
esp_err_t err;
esp_event_loop_handle_t event_loop = (esp_event_loop_handle_t) args;
ESP_LOGD(TAG, "running task for loop %p", event_loop);
while(1) {
err = esp_event_loop_run(event_loop, portMAX_DELAY);
if (err != ESP_OK) {
break;
}
}
ESP_LOGE(TAG, "suspended task for loop %p", event_loop);
vTaskSuspend(NULL);
}
// Functions that operate on handler instance
static esp_event_handler_instance_t* handler_instance_create(esp_event_handler_t event_handler, void* event_handler_arg)
{
esp_event_handler_instance_t* handler_instance = calloc(1, sizeof(*handler_instance));
if (handler_instance != NULL) {
handler_instance->handler = event_handler;
handler_instance->arg = event_handler_arg;
}
return handler_instance;
}
static void handler_instance_delete(esp_event_handler_instance_t* handler_instance)
{
free(handler_instance);
}
// Functions that operate on handler instance list
static esp_event_handler_instance_t* handler_instances_find(esp_event_handler_instances_t* handlers, esp_event_handler_t handler)
{
esp_event_handler_instance_t* it;
SLIST_FOREACH(it, handlers, handler_entry) {
if (it->handler == handler) {
break;
}
}
return it;
}
static void handler_instances_add(esp_event_handler_instances_t* handlers, esp_event_handler_instance_t* handler_instance)
{
SLIST_INSERT_HEAD(handlers, handler_instance, handler_entry);
}
static void handler_instances_remove(esp_event_handler_instances_t* handlers, esp_event_handler_instance_t* handler_instance)
{
SLIST_REMOVE(handlers, handler_instance, esp_event_handler_instance, handler_entry);
handler_instance_delete(handler_instance);
}
static void handler_instances_remove_all(esp_event_handler_instances_t* handlers)
{
esp_event_handler_instance_t* it;
esp_event_handler_instance_t* temp;
SLIST_FOREACH_SAFE(it, handlers, handler_entry, temp) {
handler_instances_remove(handlers, it);
}
}
// Functions that operate on event id instance
static void* event_id_instance_create(int32_t event_id)
{
esp_event_id_instance_t* event_id_instance = calloc(1, sizeof(*event_id_instance));
if (event_id_instance != NULL) {
event_id_instance->id = event_id;
SLIST_INIT(&(event_id_instance->handlers));
}
return event_id_instance;
}
static void event_id_instance_delete(esp_event_id_instance_t* event_id_instance)
{
handler_instances_remove_all(&(event_id_instance->handlers));
free(event_id_instance);
}
// Functions that operate on event id instance list
static void event_id_instances_remove(esp_event_id_instances_t* head, esp_event_id_instance_t* event_id_instance)
{
SLIST_REMOVE(head, event_id_instance, esp_event_id_instance, event_id_entry);
event_id_instance_delete(event_id_instance);
}
// Functions that operate on event base instance
static esp_event_base_instance_t* event_base_instance_create(esp_event_base_t event_base)
{
esp_event_base_instance_t* event_base_instance = calloc(1, sizeof(*event_base_instance));
if (event_base_instance != NULL) {
event_base_instance->base = event_base;
SLIST_INIT(&(event_base_instance->base_handlers));
SLIST_INIT(&(event_base_instance->event_ids));
}
return event_base_instance;
}
static void event_base_instance_delete(esp_event_base_instance_t* event_base_instance)
{
esp_event_id_instance_t* it;
esp_event_id_instance_t* temp;
handler_instances_remove_all(&(event_base_instance->base_handlers));
SLIST_FOREACH_SAFE(it, &(event_base_instance->event_ids), event_id_entry, temp) {
event_id_instances_remove(&(event_base_instance->event_ids), it);
}
free(event_base_instance);
}
static void event_base_instance_add_event_id_instance(esp_event_base_instance_t* event_base_instance, esp_event_id_instance_t* event_id_instance)
{
SLIST_INSERT_HEAD(&(event_base_instance->event_ids), event_id_instance, event_id_entry);
}
static esp_event_id_instance_t* event_base_instance_find_event_id_instance(esp_event_base_instance_t* event_base_instance, int32_t event_id)
{
esp_event_id_instance_t* it;
SLIST_FOREACH(it, &(event_base_instance->event_ids), event_id_entry) {
if (it->id == event_id) {
break;
}
}
return it;
}
// Functions that operate on event base instances list
static void event_base_instances_remove(esp_event_base_instances_t* head, esp_event_base_instance_t* event_base_instance)
{
SLIST_REMOVE(head, event_base_instance, esp_event_base_instance, event_base_entry);
event_base_instance_delete(event_base_instance);
}
// Functions that operate on loop instances
static void loop_add_event_base_instance(esp_event_loop_instance_t* loop, esp_event_base_instance_t* event_base_instance) {
SLIST_INSERT_HEAD(&(loop->event_bases), event_base_instance, event_base_entry);
}
static void loop_remove_all_event_base_instance(esp_event_loop_instance_t* loop)
{
esp_event_base_instance_t* it;
esp_event_base_instance_t* temp;
SLIST_FOREACH_SAFE(it, &(loop->event_bases), event_base_entry, temp) {
event_base_instances_remove(&(loop->event_bases), it);
}
}
static esp_event_base_instance_t* loop_find_event_base_instance(esp_event_loop_instance_t* loop, esp_event_base_t event_base)
{
esp_event_base_instance_t* it;
SLIST_FOREACH(it, &(loop->event_bases), event_base_entry) {
if (it->base == event_base) {
break;
}
}
return it;
}
// Functions that operate on post instance
static esp_err_t post_instance_create(esp_event_base_t event_base, int32_t event_id, void* event_data, int32_t event_data_size, esp_event_post_instance_t* post)
{
void* event_data_copy = NULL;
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// Make persistent copy of event data on heap.
if (event_data != NULL && event_data_size != 0) {
event_data_copy = calloc(1, event_data_size);
if (event_data_copy == NULL) {
ESP_LOGE(TAG, "alloc for post data to event %s:%d failed", event_base, event_id);
return ESP_ERR_NO_MEM;
}
memcpy(event_data_copy, event_data, event_data_size);
}
post->base = event_base;
post->id = event_id;
post->data = event_data_copy;
ESP_LOGD(TAG, "created post for event %s:%d", event_base, event_id);
return ESP_OK;
}
static void post_instance_delete(esp_event_post_instance_t* post)
{
free(post->data);
}
static esp_event_handler_instances_t* find_handlers_list(esp_event_loop_instance_t* loop, esp_event_base_t event_base,
int32_t event_id)
{
esp_event_handler_instances_t* handlers = NULL;
esp_event_base_instance_t* base = NULL;
esp_event_id_instance_t* event = NULL;
if (event_base == esp_event_any_base && event_id == ESP_EVENT_ANY_ID) {
handlers = &(loop->loop_handlers);
} else {
base = loop_find_event_base_instance(loop, event_base);
if (base != NULL) {
if (event_id == ESP_EVENT_ANY_ID) {
handlers = &(base->base_handlers);
} else {
event = event_base_instance_find_event_id_instance(base, event_id);
if (event != NULL) {
handlers = &(event->handlers);
}
}
}
}
return handlers;
}
/* ---------------------------- Public API --------------------------------- */
esp_err_t esp_event_loop_create(const esp_event_loop_args_t* event_loop_args, esp_event_loop_handle_t* event_loop)
{
assert(event_loop_args);
esp_event_loop_instance_t* loop;
esp_err_t err = ESP_ERR_NO_MEM; // most likely error
loop = calloc(1, sizeof(*loop));
if (loop == NULL) {
ESP_LOGE(TAG, "alloc for event loop failed");
goto on_err;
}
loop->queue = xQueueCreate(event_loop_args->queue_size , sizeof(esp_event_post_instance_t));
if (loop->queue == NULL) {
ESP_LOGE(TAG, "create event loop queue failed");
goto on_err;
}
loop->mutex = xSemaphoreCreateRecursiveMutex();
if (loop->mutex == NULL) {
ESP_LOGE(TAG, "create event loop mutex failed");
goto on_err;
}
#ifdef CONFIG_EVENT_LOOP_PROFILING
loop->profiling_mutex = xSemaphoreCreateMutex();
if (loop->profiling_mutex == NULL) {
ESP_LOGE(TAG, "create event loop profiling mutex failed");
goto on_err;
}
#endif
SLIST_INIT(&(loop->loop_handlers));
SLIST_INIT(&(loop->event_bases));
// Create the loop task if requested
if (event_loop_args->task_name != NULL) {
BaseType_t task_created = xTaskCreatePinnedToCore(esp_event_loop_run_task, event_loop_args->task_name,
event_loop_args->task_stack_size, (void*) loop,
event_loop_args->task_priority, &(loop->task), event_loop_args->task_core_id);
if (task_created != pdPASS) {
ESP_LOGE(TAG, "create task for loop failed");
err = ESP_FAIL;
goto on_err;
}
loop->name = event_loop_args->task_name;
ESP_LOGD(TAG, "created task for loop %p", loop);
} else {
loop->name = "";
loop->task = NULL;
}
loop->running_task = NULL;
#ifdef CONFIG_EVENT_LOOP_PROFILING
portENTER_CRITICAL(&s_event_loops_spinlock);
SLIST_INSERT_HEAD(&s_event_loops, loop, loop_entry);
portEXIT_CRITICAL(&s_event_loops_spinlock);
#endif
*event_loop = (esp_event_loop_handle_t) loop;
ESP_LOGD(TAG, "created event loop %p", loop);
return ESP_OK;
on_err:
if(loop->queue != NULL) {
vQueueDelete(loop->queue);
}
if(loop->mutex != NULL) {
vSemaphoreDelete(loop->mutex);
}
#ifdef CONFIG_EVENT_LOOP_PROFILING
if(loop->profiling_mutex != NULL) {
vSemaphoreDelete(loop->profiling_mutex);
}
#endif
free(loop);
return err;
}
// On event lookup performance: The library implements the event list as a linked list, which results to O(n)
// lookup time. The test comparing this implementation to the O(lg n) performance of rbtrees
// (https://github.com/freebsd/freebsd/blob/master/sys/sys/tree.h)
// indicate that the difference is not that substantial, especially considering the additional
// pointers per node of rbtrees. Code for the rbtree implementation of the event loop library is archived
// in feature/esp_event_loop_library_rbtrees if needed.
esp_err_t esp_event_loop_run(esp_event_loop_handle_t event_loop, TickType_t ticks_to_run)
{
assert(event_loop);
esp_event_loop_instance_t* loop = (esp_event_loop_instance_t*) event_loop;
esp_event_post_instance_t post;
TickType_t marker = xTaskGetTickCount();
TickType_t end = 0;
esp_event_handler_instance_t* temp;
#if( configUSE_16_BIT_TICKS == 1 )
int32_t remaining_ticks = ticks_to_run;
#else
int64_t remaining_ticks = ticks_to_run;
#endif
while(xQueueReceive(loop->queue, &post, ticks_to_run) == pdTRUE) {
esp_event_base_instance_t* base = NULL;
esp_event_id_instance_t* event = NULL;
// Reserve space for three possible matches: (1) the entry for handlers registered to all events in the loop, the
// (2) entry matching events with a specified base and (3) the entry matching both base and id.
#define LOOP_LEVEL_HANDLER 0
#define BASE_LEVEL_HANDLER 1
#define EVENT_LEVEL_HANDLER 2
esp_event_handler_instances_t* handlers_list[EVENT_LEVEL_HANDLER + 1] = {0};
// The event has already been unqueued, so ensure it gets executed.
xSemaphoreTakeRecursive(loop->mutex, portMAX_DELAY);
loop->running_task = xTaskGetCurrentTaskHandle();
handlers_list[LOOP_LEVEL_HANDLER] = &(loop->loop_handlers);
base = loop_find_event_base_instance(loop, post.base);
if (base) {
event = event_base_instance_find_event_id_instance(base, post.id);
handlers_list[BASE_LEVEL_HANDLER] = &(base->base_handlers);
if (event) {
handlers_list[EVENT_LEVEL_HANDLER] = &(event->handlers);
}
}
bool exec = false;
for (int i = LOOP_LEVEL_HANDLER; i <= EVENT_LEVEL_HANDLER; i++) {
if (handlers_list[i] != NULL) {
esp_event_handler_instance_t* it;
SLIST_FOREACH_SAFE(it, handlers_list[i], handler_entry, temp) {
ESP_LOGD(TAG, "running post %s:%d with handler %p on loop %p", post.base, post.id, it->handler, event_loop);
#ifdef CONFIG_EVENT_LOOP_PROFILING
int64_t start, diff;
start = esp_timer_get_time();
#endif
// Execute the handler
(*(it->handler))(it->arg, post.base, post.id, post.data);
#ifdef CONFIG_EVENT_LOOP_PROFILING
diff = esp_timer_get_time() - start;
xSemaphoreTake(loop->profiling_mutex, portMAX_DELAY);
it->total_times_invoked++;
it->total_runtime += diff;
if (i == LOOP_LEVEL_HANDLER) {
loop->loop_handlers_invoked++;
loop->loop_handlers_runtime += diff;
} else if (i == BASE_LEVEL_HANDLER) {
base->base_handlers_invoked++;
base->base_handlers_runtime += diff;
} else {
event->handlers_invoked++;
event->handlers_runtime += diff;
}
loop->total_handlers_invoked++;
loop->total_handlers_runtime += diff;
xSemaphoreGive(loop->profiling_mutex);
#endif
}
}
exec |= true;
}
post_instance_delete(&post);
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if (ticks_to_run != portMAX_DELAY) {
end = xTaskGetTickCount();
remaining_ticks -= end - marker;
// If the ticks to run expired, return to the caller
if (remaining_ticks <= 0) {
xSemaphoreGiveRecursive(loop->mutex);
break;
} else {
marker = end;
}
}
loop->running_task = NULL;
xSemaphoreGiveRecursive(loop->mutex);
if (!exec) {
// No handlers were registered, not even loop/base level handlers
ESP_LOGW(TAG, "no handlers have been registered for event %s:%d posted to loop %p", post.base, post.id, event_loop);
}
}
return ESP_OK;
}
esp_err_t esp_event_loop_delete(esp_event_loop_handle_t event_loop)
{
assert(event_loop);
esp_event_loop_instance_t* loop = (esp_event_loop_instance_t*) event_loop;
SemaphoreHandle_t loop_mutex = loop->mutex;
#ifdef CONFIG_EVENT_LOOP_PROFILING
SemaphoreHandle_t loop_profiling_mutex = loop->profiling_mutex;
#endif
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xSemaphoreTakeRecursive(loop->mutex, portMAX_DELAY);
#ifdef CONFIG_EVENT_LOOP_PROFILING
xSemaphoreTakeRecursive(loop->profiling_mutex, portMAX_DELAY);
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portENTER_CRITICAL(&s_event_loops_spinlock);
SLIST_REMOVE(&s_event_loops, loop, esp_event_loop_instance, loop_entry);
portEXIT_CRITICAL(&s_event_loops_spinlock);
#endif
// Delete the task if it was created
if (loop->task != NULL) {
vTaskDelete(loop->task);
}
// Remove all registered events in the loop
handler_instances_remove_all(&(loop->loop_handlers));
loop_remove_all_event_base_instance(loop);
// Drop existing posts on the queue
esp_event_post_instance_t post;
while(xQueueReceive(loop->queue, &post, 0) == pdTRUE) {
free(post.data);
}
// Cleanup loop
vQueueDelete(loop->queue);
free(loop);
// Free loop mutex before deleting
xSemaphoreGiveRecursive(loop_mutex);
#ifdef CONFIG_EVENT_LOOP_PROFILING
xSemaphoreGiveRecursive(loop_profiling_mutex);
vSemaphoreDelete(loop_profiling_mutex);
#endif
2018-10-26 05:14:19 +00:00
vSemaphoreDelete(loop_mutex);
ESP_LOGD(TAG, "deleted loop %p", (void*) event_loop);
return ESP_OK;
}
esp_err_t esp_event_handler_register_with(esp_event_loop_handle_t event_loop, esp_event_base_t event_base,
int32_t event_id, esp_event_handler_t event_handler, void* event_handler_arg)
{
assert(event_loop);
assert(event_handler);
if (event_base == ESP_EVENT_ANY_BASE && event_id != ESP_EVENT_ANY_ID) {
ESP_LOGE(TAG, "registering to any event base with specific id unsupported");
return ESP_ERR_INVALID_ARG;
}
esp_event_loop_instance_t* loop = (esp_event_loop_instance_t*) event_loop;
esp_event_base_instance_t* base = NULL;
esp_event_id_instance_t* event = NULL;
esp_event_handler_instance_t* handler = NULL;
esp_event_handler_instances_t* handlers = NULL;
bool base_created = false;
bool event_created = false;
if (event_base == ESP_EVENT_ANY_BASE) {
event_base = esp_event_any_base;
}
xSemaphoreTakeRecursive(loop->mutex, portMAX_DELAY);
if (event_base == esp_event_any_base && event_id == ESP_EVENT_ANY_ID) {
// Add to the loop-level handlers
handlers = &(loop->loop_handlers);
} else {
// If base instance does not exist, create one
if ((base = loop_find_event_base_instance(loop, event_base)) == NULL) {
base = event_base_instance_create(event_base);
if (base == NULL) {
xSemaphoreGiveRecursive(loop->mutex);
return ESP_ERR_NO_MEM;
}
base_created = true;
}
// Add to the event base instance level handlers
if (event_id == ESP_EVENT_ANY_ID) {
handlers = &(base->base_handlers);
} else {
if (base_created ||
(event = event_base_instance_find_event_id_instance(base, event_id)) == NULL) {
event = event_id_instance_create(event_id);
// If it does not exist, create one
if (event == NULL) {
if (base_created) {
event_base_instance_delete(base);
}
xSemaphoreGiveRecursive(loop->mutex);
return ESP_ERR_NO_MEM;
}
event_created = true;
}
// Add to the event id instance level handlers
handlers = &(event->handlers);
}
}
// Add handler to the list
if (base_created || event_created ||
(handler = handler_instances_find(handlers, event_handler)) == NULL) {
handler = handler_instance_create(event_handler, event_handler_arg);
if (handler == NULL) {
if (event_created) {
event_id_instance_delete(event);
}
if (base_created) {
event_base_instance_delete(base);
}
xSemaphoreGiveRecursive(loop->mutex);
return ESP_ERR_NO_MEM;
}
handler_instances_add(handlers, handler);
// If a new event base/ event id instance was created, add them to the appropriate list
if (event_created) {
event_base_instance_add_event_id_instance(base, event);
}
if (base_created) {
loop_add_event_base_instance(loop, base);
}
ESP_LOGD(TAG, "registered handler %p for event %s:%d", event_handler, event_base, event_id);
} else {
handler->arg = event_handler_arg;
ESP_LOGW(TAG, "handler %p for event %s:%d already registered, overwriting", event_handler, event_base, event_id);
}
xSemaphoreGiveRecursive(loop->mutex);
return ESP_OK;
}
esp_err_t esp_event_handler_unregister_with(esp_event_loop_handle_t event_loop, esp_event_base_t event_base,
int32_t event_id, esp_event_handler_t event_handler)
{
assert(event_loop);
assert(event_handler);
if (event_base == ESP_EVENT_ANY_BASE && event_id != ESP_EVENT_ANY_ID) {
ESP_LOGE(TAG, "unregistering to any event base with specific id unsupported");
return ESP_FAIL;
}
if (event_base == ESP_EVENT_ANY_BASE) {
event_base = esp_event_any_base;
}
esp_event_loop_instance_t* loop = (esp_event_loop_instance_t*) event_loop;
esp_event_handler_instance_t* handler = NULL;
esp_event_handler_instances_t* handlers = find_handlers_list(loop, event_base, event_id);
xSemaphoreTakeRecursive(loop->mutex, portMAX_DELAY);
if (handlers != NULL &&
(handler = handler_instances_find(handlers, event_handler)) != NULL) {
handler_instances_remove(handlers, handler);
ESP_LOGD(TAG, "unregistered handler %p from event %s:%d", event_handler, event_base, event_id);
} else {
ESP_LOGW(TAG, "handler %p for event %s:%d not registered, ignoring", event_handler, event_base, event_id);
}
xSemaphoreGiveRecursive(loop->mutex);
return ESP_OK;
}
esp_err_t esp_event_post_to(esp_event_loop_handle_t event_loop, esp_event_base_t event_base, int32_t event_id,
void* event_data, size_t event_data_size, TickType_t ticks_to_wait)
{
assert(event_loop);
if (event_base == ESP_EVENT_ANY_BASE || event_id == ESP_EVENT_ANY_ID) {
ESP_LOGE(TAG, "posting nonspecific event base or id unsupported");
return ESP_ERR_INVALID_ARG;
}
esp_event_loop_instance_t* loop = (esp_event_loop_instance_t*) event_loop;
esp_event_post_instance_t post;
esp_err_t err = post_instance_create(event_base, event_id, event_data, event_data_size, &post);
if (err != ESP_OK) {
return err;
}
BaseType_t result = pdFALSE;
// Find the task that currently executes the loop. It is safe to query loop->task since it is
// not mutated since loop creation. ENSURE THIS REMAINS TRUE.
if (loop->task == NULL) {
// The loop has no dedicated task. Find out what task is currently running it.
result = xSemaphoreTakeRecursive(loop->mutex, ticks_to_wait);
if (result == pdTRUE) {
if (loop->running_task != xTaskGetCurrentTaskHandle()) {
xSemaphoreGiveRecursive(loop->mutex);
result = xQueueSendToBack(loop->queue, &post, ticks_to_wait);
} else {
xSemaphoreGiveRecursive(loop->mutex);
result = xQueueSendToBack(loop->queue, &post, 0);
}
}
} else {
// The loop has a dedicated task.
if (loop->task != xTaskGetCurrentTaskHandle()) {
result = xQueueSendToBack(loop->queue, &post, ticks_to_wait);
} else {
result = xQueueSendToBack(loop->queue, &post, 0);
}
}
if (result != pdTRUE) {
post_instance_delete(&post);
#ifdef CONFIG_EVENT_LOOP_PROFILING
xSemaphoreTake(loop->profiling_mutex, portMAX_DELAY);
loop->events_dropped++;
xSemaphoreGive(loop->profiling_mutex);
#endif
return ESP_ERR_TIMEOUT;
}
#ifdef CONFIG_EVENT_LOOP_PROFILING
xSemaphoreTake(loop->profiling_mutex, portMAX_DELAY);
loop->events_recieved++;
xSemaphoreGive(loop->profiling_mutex);
#endif
ESP_LOGD(TAG, "posted %s:%d to loop %p", post.base, post.id, event_loop);
return ESP_OK;
}
esp_err_t esp_event_dump(FILE* file)
{
#ifdef CONFIG_EVENT_LOOP_PROFILING
assert(file);
esp_event_loop_instance_t* loop_it;
esp_event_base_instance_t* base_it;
esp_event_id_instance_t* id_it;
esp_event_handler_instance_t* handler_it;
// Allocate memory for printing
int sz = esp_event_dump_prepare();
char* buf = calloc(sz, sizeof(char));
char* dst = buf;
// Print info to buffer
portENTER_CRITICAL(&s_event_loops_spinlock);
SLIST_FOREACH(loop_it, &s_event_loops, loop_entry) {
PRINT_DUMP_INFO(dst, sz, LOOP_DUMP_FORMAT, loop_it, loop_it->name, loop_it->events_recieved,
loop_it->events_dropped, loop_it->total_handlers_invoked, loop_it->total_handlers_runtime);
// Print loop-level handler
PRINT_DUMP_INFO(dst, sz, esp_event_any_base, ESP_EVENT_ANY_ID, loop_it->loop_handlers_invoked,
loop_it->loop_handlers_runtime);
SLIST_FOREACH(handler_it, &(loop_it->loop_handlers), handler_entry) {
PRINT_DUMP_INFO(dst, sz, HANDLER_DUMP_FORMAT, handler_it->handler, handler_it->total_times_invoked,
handler_it->total_runtime);
}
SLIST_FOREACH(base_it, &(loop_it->event_bases), event_base_entry) {
// Print base-level handler
PRINT_DUMP_INFO(dst, sz, EVENT_DUMP_FORMAT, base_it->base, ESP_EVENT_ANY_ID,
base_it->base_handlers_invoked, base_it->base_handlers_runtime);
SLIST_FOREACH(handler_it, &(base_it->base_handlers), handler_entry) {
PRINT_DUMP_INFO(dst, sz, HANDLER_DUMP_FORMAT, handler_it->handler,
handler_it->total_times_invoked, handler_it->total_runtime);
}
// Print event-level handlers
SLIST_FOREACH(id_it, &(base_it->event_ids), event_id_entry) {
PRINT_DUMP_INFO(dst, sz, EVENT_DUMP_FORMAT, base_it->base, id_it->id,
id_it->handlers_invoked, id_it->handlers_runtime);
SLIST_FOREACH(handler_it, &(id_it->handlers), handler_entry) {
PRINT_DUMP_INFO(dst, sz, HANDLER_DUMP_FORMAT, handler_it->handler,
handler_it->total_times_invoked, handler_it->total_runtime);
}
}
}
}
portEXIT_CRITICAL(&s_event_loops_spinlock);
// Print the contents of the buffer to the file
fprintf(file, buf);
// Free the allocated buffer
free(buf);
#endif
return ESP_OK;
}