recurrent scheduled functions max delay update#8949

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dok-net wants to merge 29 commits intoesp8266:masterfrom

dok-net:fix_8947

Commits on Jan 5, 2024

Revert `compute_scheduled_recurrent_grain`
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wip
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Add function to retrieve the time remaining until the (next) timeout occurs.
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Rename and reformat according to review.
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Revert _current as member change.
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Fix expiredOneShot to properly stay expired forever unless reset.
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Fix "reverse notation return statement"
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Reset() was wrecked by resetting _timeout. Reverted.
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Expired check ALWAYS executes yield policy BEFORE checking expiration - that's wasted time.
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Reformat
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Fix comment, remove redundant parentheses
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expired() is not const qualified in PolledTmeout.
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expiredOneShot() qualifed as const, despite asymmetry with expired() and expiredRetrigger().
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Remove alwaysExpired, it is identical to 0 and obfuscates the code.
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Somewhat easier on the human reader.
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Avoid possible unnecessary time conversion.
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Fix one-shot mode in resetToNeverExpires(). Add convenient stop() synonym for same function.
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Due to review and discussion, _oneShotExpired removed again.
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Revert removal of PolledTimeout::alwaysExpired
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Finalize scheduled recurrent function delay logic.
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Fix millis/micros mismatch.
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ISR safety.
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Returning max delay value that is uint-wrap around safe.
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Add pseudo-get delay function for scheduled functions
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Worked out input from PR review.
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use single constexpr definition instead of repeated expression.
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Simplified roll-over logic
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Add rationale for HALF_MAX_MICROS
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Use CAS to minimize critical sections.
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recurrent scheduled functions max delay update#8949

Commits on Jan 5, 2024

Revert `compute_scheduled_recurrent_grain`

wip

Add function to retrieve the time remaining until the (next) timeout occurs.

Rename and reformat according to review.

Revert _current as member change.

Fix expiredOneShot to properly stay expired forever unless reset.

Fix "reverse notation return statement"

Reset() was wrecked by resetting _timeout. Reverted.

Expired check ALWAYS executes yield policy BEFORE checking expiration - that's wasted time.

Reformat

Fix comment, remove redundant parentheses

expired() is not const qualified in PolledTmeout.

expiredOneShot() qualifed as const, despite asymmetry with expired() and expiredRetrigger().

Remove alwaysExpired, it is identical to 0 and obfuscates the code.

Somewhat easier on the human reader.

Avoid possible unnecessary time conversion.

Fix one-shot mode in resetToNeverExpires(). Add convenient stop() synonym for same function.

Due to review and discussion, _oneShotExpired removed again.

Revert removal of PolledTimeout::alwaysExpired

Finalize scheduled recurrent function delay logic.

Fix millis/micros mismatch.

ISR safety.

Returning max delay value that is uint-wrap around safe.

Add pseudo-get delay function for scheduled functions

Worked out input from PR review.

use single constexpr definition instead of repeated expression.

Simplified roll-over logic

Add rationale for HALF_MAX_MICROS

Use CAS to minimize critical sections.