For implementers, the locking model adds a fair amount of non-trivial internal bookkeeping. Every operation must check lock state, readers must be tracked, and the interplay between locks, cancellation, and error states creates a matrix of edge cases that must all be handled correctly.
AP writers Melissa Goldin, Tim Reynolds and John Wawrow as well as the Canadian Press contributed.
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Tourette's film nominated for six BAFTA awards