A coherency technique for multiprocessor systems in which threads perform atomic read or atomic write transactions pursuant to memory-to-memory copy instructions or memory-to-memory compare-and-exchange instructions. The CRS system may include a high sensitivity measurement mode in which it uses an unconventional low sampling rate or \u201clong\u201d self-saturating exposure time, to measure the low reflectivity surface. The cooperation between the cyclodextrin grafted onto the thermoplastic polymer and the polymer structure can provide barrier properties to a film, web or other polymer structure.