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This commit is contained in:
J. Nick Koston
2025-06-25 17:22:23 +02:00
parent 8652464f4e
commit 915da9ae13
1 changed files with 9 additions and 6 deletions
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15
esphome/components/api/api_connection.h
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@@ -485,6 +485,9 @@ class APIConnection : public APIServerConnection {
// Optimized MessageCreator class using tagged pointer
class MessageCreator {
// Ensure pointer alignment allows LSB tagging
static_assert(alignof(std::string *) > 1, "String pointer alignment must be > 1 for LSB tagging");
public:
// Constructor for function pointer
MessageCreator(MessageCreatorPtr ptr) {
@@ -502,14 +505,14 @@ class APIConnection : public APIServerConnection {
// Destructor
~MessageCreator() {
if (is_string()) {
if (has_tagged_string_ptr()) {
delete get_string_ptr();
}
}
// Copy constructor
MessageCreator(const MessageCreator &other) {
if (other.is_string()) {
if (other.has_tagged_string_ptr()) {
auto *str = new std::string(*other.get_string_ptr());
data_.tagged = reinterpret_cast<uintptr_t>(str) | 1;
} else {
@@ -524,11 +527,11 @@ class APIConnection : public APIServerConnection {
MessageCreator &operator=(const MessageCreator &other) {
if (this != &other) {
// Clean up current string data if needed
if (is_string()) {
if (has_tagged_string_ptr()) {
delete get_string_ptr();
}
// Copy new data
if (other.is_string()) {
if (other.has_tagged_string_ptr()) {
auto *str = new std::string(*other.get_string_ptr());
data_.tagged = reinterpret_cast<uintptr_t>(str) | 1;
} else {
@@ -541,7 +544,7 @@ class APIConnection : public APIServerConnection {
MessageCreator &operator=(MessageCreator &&other) noexcept {
if (this != &other) {
// Clean up current string data if needed
if (is_string()) {
if (has_tagged_string_ptr()) {
delete get_string_ptr();
}
// Move data
@@ -558,7 +561,7 @@ class APIConnection : public APIServerConnection {
private:
// Check if this contains a string pointer
bool is_string() const { return (data_.tagged & 1) != 0; }
bool has_tagged_string_ptr() const { return (data_.tagged & 1) != 0; }
// Get the actual string pointer (clears the tag bit)
std::string *get_string_ptr() const { return reinterpret_cast<std::string *>(data_.tagged & ~uintptr_t(1)); }