use initialization-on-demand holder idiom #55
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This gives us a highly efficient thread-safe "singleton" cache, without synchronization overhead... lecture: https://en.wikipedia.org/wiki/Initialization-on-demand_holder_idiom
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May 18, 2021
- Adds the Unix javah-created header (also tested with MSVC) for creating builds on machines without (or with dated version of) maven. - Adds a "cmake -E copy" task to copy the native libraries to src/main/resources-precompiled/natives; convenience for speeding up the time it takes to update the binary releases in the repo.
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This gives us a highly efficient thread-safe "singleton" cache, without synchronization overhead...
(lecture: https://en.wikipedia.org/wiki/Initialization-on-demand_holder_idiom)
The access modifier for the constructor was changed to private as this is normal for a singleton class.