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Eliminate API component guard variable to save 8 bytes RAM (#9341)

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J. Nick Koston 2025-07-05 23:34:55 -05:00 committed by GitHub
parent 20ba035e3b
commit 0bc18a8281
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GPG Key ID: B5690EEEBB952194
2 changed files with 18 additions and 2 deletions
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8
esphome/components/api/api_server.cpp
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@ -24,6 +24,14 @@ static const char *const TAG = "api";
// APIServer
APIServer *global_api_server = nullptr; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
#ifndef USE_API_YAML_SERVICES
// Global empty vector to avoid guard variables (saves 8 bytes)
// This is initialized at program startup before any threads
static const std::vector<UserServiceDescriptor *> empty_user_services{};
const std::vector<UserServiceDescriptor *> &get_empty_user_services_instance() { return empty_user_services; }
#endif
APIServer::APIServer() {
global_api_server = this;
// Pre-allocate shared write buffer

12
esphome/components/api/api_server.h
View File

@ -25,6 +25,11 @@ struct SavedNoisePsk {
} PACKED; // NOLINT
#endif
#ifndef USE_API_YAML_SERVICES
// Forward declaration of helper function
const std::vector<UserServiceDescriptor *> &get_empty_user_services_instance();
#endif
class APIServer : public Component, public Controller {
public:
APIServer();
@ -151,8 +156,11 @@ class APIServer : public Component, public Controller {
#ifdef USE_API_YAML_SERVICES
return this->user_services_;
#else
static const std::vector<UserServiceDescriptor *> EMPTY;
return this->user_services_ ? *this->user_services_ : EMPTY;
if (this->user_services_) {
return *this->user_services_;
}
// Return reference to global empty instance (no guard needed)
return get_empty_user_services_instance();
#endif
}