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This commit is contained in:
J. Nick Koston
2025-06-17 14:38:00 +02:00
parent ea3ea1eee7
commit 685ed87581
1 changed files with 7 additions and 0 deletions
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7
esphome/components/gpio/binary_sensor/gpio_binary_sensor.h
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@@ -24,6 +24,13 @@ class GPIOBinarySensorStore {
bool has_changed() { bool has_changed() {
// No lock needed: single writer (ISR) / single reader (main loop) pattern // No lock needed: single writer (ISR) / single reader (main loop) pattern
// Volatile bool operations are atomic on all ESPHome-supported platforms // Volatile bool operations are atomic on all ESPHome-supported platforms
//
// Note: There's a benign race where ISR could set changed_ = true between
// our read and clear. This is intentional and causes no issues because:
// 1. We'll process the state change on the next loop iteration
// 2. Multiple rapid changes between loop iterations would only result in
// one update anyway (we only care about the final state)
// 3. This avoids the overhead of atomic operations in the ISR
if (!this->changed_) { if (!this->changed_) {
return false; return false;
} }