github/esphome
2
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2026-09-20 19:48:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

Use leak-on-purpose raw pointers for Climate-owned vectors

Browse Source 
Climate entities live for the entire program lifetime, so the custom
mode vectors never need to be freed. Use raw pointers (null by default,
allocated on first set_supported_custom_*() call) instead of inline
std::vector members.

This saves 48 bytes of RAM per Climate instance (two empty vectors)
for components that don't use custom modes (bang_bang, pid, etc.),
and avoids any copy overhead in get_traits().
This commit is contained in:
J. Nick Koston
2026-03-26 13:22:46 -10:00
parent ba57555b6f
commit 805bc4c9a8
2 changed files with 29 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
esphome/components/climate/climate.cpp
+7 -6
View File
@@ -485,10 +485,10 @@ void Climate::publish_state() {
ClimateTraits Climate::get_traits() {
auto traits = this->traits();
// Wire custom mode pointers from Climate-owned storage
if (!this->supported_custom_fan_modes_.empty())
traits.set_supported_custom_fan_modes(&this->supported_custom_fan_modes_);
if (!this->supported_custom_presets_.empty())
traits.set_supported_custom_presets(&this->supported_custom_presets_);
if (this->supported_custom_fan_modes_)
traits.set_supported_custom_fan_modes(this->supported_custom_fan_modes_);
if (this->supported_custom_presets_)
traits.set_supported_custom_presets(this->supported_custom_presets_);
#ifdef USE_CLIMATE_VISUAL_OVERRIDES
if (!std::isnan(this->visual_min_temperature_override_)) {
traits.set_visual_min_temperature(this->visual_min_temperature_override_);
@@ -706,7 +706,8 @@ const char *Climate::find_custom_fan_mode_(const char *custom_fan_mode) {
}
const char *Climate::find_custom_fan_mode_(const char *custom_fan_mode, size_t len) {
return vector_find(this->supported_custom_fan_modes_, custom_fan_mode, len);
return this->supported_custom_fan_modes_ ? vector_find(*this->supported_custom_fan_modes_, custom_fan_mode, len)
: nullptr;
}
const char *Climate::find_custom_preset_(const char *custom_preset) {
@@ -714,7 +715,7 @@ const char *Climate::find_custom_preset_(const char *custom_preset) {
}
const char *Climate::find_custom_preset_(const char *custom_preset, size_t len) {
return vector_find(this->supported_custom_presets_, custom_preset, len);
return this->supported_custom_presets_ ? vector_find(*this->supported_custom_presets_, custom_preset, len) : nullptr;
}
void Climate::dump_traits_(const char *tag) {
esphome/components/climate/climate.h
+22 -9
View File
@@ -236,24 +236,37 @@ class Climate : public EntityBase {
/// Set the supported custom fan modes (stored on Climate, referenced by ClimateTraits).
void set_supported_custom_fan_modes(std::initializer_list<const char *> modes) {
this->supported_custom_fan_modes_ = modes;
if (!this->supported_custom_fan_modes_)
this->supported_custom_fan_modes_ =
new std::vector<const char *>(); // NOLINT - intentional leak, entity lives forever
*this->supported_custom_fan_modes_ = modes;
}
void set_supported_custom_fan_modes(const std::vector<const char *> &modes) {
this->supported_custom_fan_modes_ = modes;
if (!this->supported_custom_fan_modes_)
this->supported_custom_fan_modes_ = new std::vector<const char *>(); // NOLINT
*this->supported_custom_fan_modes_ = modes;
}
template<size_t N> void set_supported_custom_fan_modes(const char *const (&modes)[N]) {
this->supported_custom_fan_modes_.assign(modes, modes + N);
if (!this->supported_custom_fan_modes_)
this->supported_custom_fan_modes_ = new std::vector<const char *>(); // NOLINT
this->supported_custom_fan_modes_->assign(modes, modes + N);
}
/// Set the supported custom presets (stored on Climate, referenced by ClimateTraits).
void set_supported_custom_presets(std::initializer_list<const char *> presets) {
this->supported_custom_presets_ = presets;
if (!this->supported_custom_presets_)
this->supported_custom_presets_ = new std::vector<const char *>(); // NOLINT
*this->supported_custom_presets_ = presets;
}
void set_supported_custom_presets(const std::vector<const char *> &presets) {
this->supported_custom_presets_ = presets;
if (!this->supported_custom_presets_)
this->supported_custom_presets_ = new std::vector<const char *>(); // NOLINT
*this->supported_custom_presets_ = presets;
}
template<size_t N> void set_supported_custom_presets(const char *const (&presets)[N]) {
this->supported_custom_presets_.assign(presets, presets + N);
if (!this->supported_custom_presets_)
this->supported_custom_presets_ = new std::vector<const char *>(); // NOLINT
this->supported_custom_presets_->assign(presets, presets + N);
}
/// Check if a custom fan mode is currently active.
@@ -366,11 +379,11 @@ class Climate : public EntityBase {
LazyCallbackManager<void(ClimateCall &)> control_callback_{};
ESPPreferenceObject rtc_;
/** Custom mode storage - owned by Climate, referenced by ClimateTraits via pointer.
/** Custom mode storage — allocated on first use, never freed (entity lives forever).
* Pointers in these vectors must point to string literals or static data.
*/
std::vector<const char *> supported_custom_fan_modes_;
std::vector<const char *> supported_custom_presets_;
std::vector<const char *> *supported_custom_fan_modes_{nullptr};
std::vector<const char *> *supported_custom_presets_{nullptr};
#ifdef USE_CLIMATE_VISUAL_OVERRIDES
float visual_min_temperature_override_{NAN};