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Anand Krishnamoorthi 688e6128d4 feat: Detect incorrect multi-threaded use from c based ffi (#499)
Add runtime detection for shared handle misuse

wrap the FFI engine handle with parking_lot::RwLock when the new
contention_checks feature is enabled, surfacing a clear “handle is already
in use” error instead of allowing undefined behavior
keep the feature optional so no_std builds or environments that supply
their own synchronization can opt out
caution users that this guards the handle itself but does not make the
engine’s operations globally thread-safe on its own

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
2025-11-17 14:21:13 -06:00
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