add MultiLock class #693
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add MultiLock class #693
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Signed-off-by: David Wood <dawood@us.ibm.com>
… transform Signed-off-by: David Wood <dawood@us.ibm.com>
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Why are these changes needed?
This is needed to support inter-process and thread synchronization.
With this, transforms can now run multi-process (via local ray actors, for example) and not get synchronization errors.
Related issue number (if any).
#667 will require pdf2parquet to make use of this lock.