ENHANCED: Avoid is_stream/1 to block if the stream is locked by another thread.
ENHANCED: Avoid is_stream/1 to block if the stream is locked by another thread.

koryonik/swipl-devel,edechter/swipl-devel,mndrix/swipl-devel,edechter/swipl-devel,jn7163/swipl-devel,jn7163/swipl-devel,jn7163/swipl-devel,koryonik/swipl-devel,mndrix/swipl-devel,jn7163/swipl-devel,edechter/swipl-devel,edechter/swipl-devel,koryonik/swipl-devel,mndrix/swipl-devel,mndrix/swipl-devel,edechter/swipl-devel,jn7163/swipl-devel,mndrix/swipl-devel,koryonik/swipl-devel,koryonik/swipl-devel