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Reduce RAM usage for scheduled tasks (#9180)
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@ -319,13 +319,17 @@ bool HOT Scheduler::cancel_item_(Component *component, const std::string &name,
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return ret;
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}
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uint64_t Scheduler::millis_() {
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// Get the current 32-bit millis value
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const uint32_t now = millis();
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// Check for rollover by comparing with last value
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if (now < this->last_millis_) {
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// Detected rollover (happens every ~49.7 days)
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this->millis_major_++;
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ESP_LOGD(TAG, "Incrementing scheduler major at %" PRIu64 "ms",
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now + (static_cast<uint64_t>(this->millis_major_) << 32));
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}
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this->last_millis_ = now;
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// Combine major (high 32 bits) and now (low 32 bits) into 64-bit time
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return now + (static_cast<uint64_t>(this->millis_major_) << 32);
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}
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@ -29,12 +29,16 @@ class Scheduler {
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protected:
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struct SchedulerItem {
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// Ordered by size to minimize padding
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Component *component;
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std::string name;
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enum Type { TIMEOUT, INTERVAL } type;
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uint32_t interval;
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// 64-bit time to handle millis() rollover. The scheduler combines the 32-bit millis()
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// with a 16-bit rollover counter to create a 64-bit time that won't roll over for
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// billions of years. This ensures correct scheduling even when devices run for months.
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uint64_t next_execution_;
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std::string name;
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std::function<void()> callback;
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enum Type : uint8_t { TIMEOUT, INTERVAL } type;
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bool remove;
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static bool cmp(const std::unique_ptr<SchedulerItem> &a, const std::unique_ptr<SchedulerItem> &b);
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