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Refactor Buffer class cache clearing for error handling and efficiency #23

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Merged
kabanaty merged 2 commits into from
Jun 17, 2026
Merged

Refactor Buffer class cache clearing for error handling and efficiency #23

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46d6fe2
Enhance cache clearing logic in Buffer class to handle stale context …
kabanaty Jun 17, 2026
44427cd
Merge branch 'slaclab:master' into master
kabanaty Jun 17, 2026
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13 changes: 13 additions & 0 deletions slac_timing/buffer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,7 @@ def _clear_ca_cache(self) -> None:
return

suffix = f"HST{self.number}"

stale_pvids = [
pvid for pvid in list(_PVcache_)
if pvid[0].endswith(suffix)
Expand All @@ -96,6 +97,18 @@ def _clear_ca_cache(self) -> None:
except BaseException:
pass

context_cache = epics.ca._cache.get(ctx)
if context_cache is None:
return
stale_names = [name for name in context_cache if name.endswith(suffix)]
for name in stale_names:
entry = context_cache.get(name)
if entry is not None and getattr(entry, "chid", None) is not None:
try:
epics.ca.clear_channel(entry.chid)
except BaseException:
context_cache.pop(name, None)

def is_reserved(self) -> bool:
return self.number is not None and self.number != 0

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