- Use STATIC_NEW for mutex creation, to avoid order-of-destruction problems
by avoiding destruction altogether, while avoiding memory leak reports.
- Remove UConditionVar, replace with direct use of std::condition_variable
Remove the dependencies from the ICU library code on static constructors
that were introduced by using std::mutex and condition variables. The
mutexes are lazily initialized by embedding them as local static variables
in getter functions, and relying on the C++ compiler/runtime to do thread
safe initialization of them.
Remove all POSIX and Win32 specific mutex, atomic and threading implementations
in favor of C++11 std library functions.
Move the related (internal) ICU types and functions into the icu namespace.
- fastpath for UnicodeSet.add(new last range)
- fewer UnicodeSet memory allocations:
initial internal list array, exponential array growth,
allocate strings list/set only when first one is added
- faster CodePointTrie.getRange(): fewer calls to filter function
- revert UnicodeSet(intprop=value) from trie ranges to range starts + lookup
- cache per-int-prop range starts: fewer lookups
