github/esphome
2
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2026-09-24 21:44:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

[mqtt] Reduce heap allocations in hot paths

Browse Source
This commit is contained in:
J. Nick Koston
2026-01-18 22:10:48 -10:00
parent d83457bbe1
commit 0117519c81
2 changed files with 15 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
esphome/components/mqtt/mqtt_component.cpp
+9
View File
@@ -35,6 +35,15 @@ static constexpr size_t DISCOVERY_PREFIX_MAX_LEN = 64; // Validated in Python:
static constexpr size_t DISCOVERY_TOPIC_MAX_LEN = DISCOVERY_PREFIX_MAX_LEN + 1 + MQTT_COMPONENT_TYPE_MAX_LEN + 1 +
ESPHOME_DEVICE_NAME_MAX_LEN + 1 + OBJECT_ID_MAX_LEN + 7 + 1;
// Function implementation of LOG_MQTT_COMPONENT macro to reduce code size
void log_mqtt_component(const char *tag, MQTTComponent *obj, bool state_topic, bool command_topic) {
char buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
if (state_topic)
ESP_LOGCONFIG(tag, " State Topic: '%s'", obj->get_state_topic_to_(buf).c_str());
if (command_topic)
ESP_LOGCONFIG(tag, " Command Topic: '%s'", obj->get_command_topic_to_(buf).c_str());
}
void MQTTComponent::set_qos(uint8_t qos) { this->qos_ = qos; }
void MQTTComponent::set_subscribe_qos(uint8_t qos) { this->subscribe_qos_ = qos; }
esphome/components/mqtt/mqtt_component.h
+6 -9
View File
@@ -32,15 +32,10 @@ static constexpr size_t MQTT_TOPIC_PREFIX_MAX_LEN = 64; // Validated in Python:
static constexpr size_t MQTT_DEFAULT_TOPIC_MAX_LEN =
MQTT_TOPIC_PREFIX_MAX_LEN + 1 + MQTT_COMPONENT_TYPE_MAX_LEN + 1 + OBJECT_ID_MAX_LEN + 1 + MQTT_SUFFIX_MAX_LEN + 1;
#define LOG_MQTT_COMPONENT(state_topic, command_topic) \
if (state_topic) { \
char __mqtt_topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN]; \
ESP_LOGCONFIG(TAG, " State Topic: '%s'", this->get_state_topic_to_(__mqtt_topic_buf).c_str()); \
} \
if (command_topic) { \
char __mqtt_topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN]; \
ESP_LOGCONFIG(TAG, " Command Topic: '%s'", this->get_command_topic_to_(__mqtt_topic_buf).c_str()); \
}
class MQTTComponent; // Forward declaration
void log_mqtt_component(const char *tag, MQTTComponent *obj, bool state_topic, bool command_topic);
#define LOG_MQTT_COMPONENT(state_topic, command_topic) log_mqtt_component(TAG, this, state_topic, command_topic)
// Macro to define component_type() with compile-time length verification
// Usage: MQTT_COMPONENT_TYPE(MQTTSensorComponent, "sensor")
@@ -84,6 +79,8 @@ static constexpr size_t MQTT_DEFAULT_TOPIC_MAX_LEN =
* a clean separation.
*/
class MQTTComponent : public Component {
friend void log_mqtt_component(const char *tag, MQTTComponent *obj, bool state_topic, bool command_topic);
public:
/// Constructs a MQTTComponent.
explicit MQTTComponent();