El 10/09/2010 8:13, joaquin@tid.es escribió:
Ion Gaztañaga escribió:
The lazy init does not work because somehow get() is being called in a static object (static_initializer()->init()), so it's lazily but *too early* instantiated.
This is aspect of Boost.Flyweight is by design, instantiation of the singleton class is made during the program dynamic initialization phase so as to avoid concurrency problems to a large extent (see http://tinyurl.com/38jknra ).
Threading shouldn't be a problem, because lazy initialization is serialized through mutexes (even the non-lazy initialization, because non-lazy is just using lazy initialization in a static object). Two threads calling get() shouldn't lead to a race condition when obtaining a pointer to the singleton. Further concurrent usage should be of course protected by the user. Best, Ion