always use thread_local globals; prevent nesting exchangeBuffer()
always use thread_local globals; prevent nesting exchangeBuffer()

JGrothoff/open62541,jpfr/open62541,JGrothoff/open62541,open62541/open62541,jpfr/open62541,StalderT/open62541,open62541/open62541,jpfr/open62541,open62541/open62541,open62541/open62541,JGrothoff/open62541,StalderT/open62541,JGrothoff/open62541,jpfr/open62541,StalderT/open62541,StalderT/open62541