c++ - How to get size of boost SPSC Queue? -


we know number of element in queue @ given point of time. pushing , popping objects, know number of object in queue buffer. there inbuilt function ? or other way ?

http://www.boost.org/doc/libs/1_53_0/doc/html/boost/lockfree/spsc_queue.html

you can't reliably size because invites race conditions. same reason, won't find empty() method: time method returned value, irrelevant, because might have changed.

sometimes lockfree containers provide "unreliable_size()" method (for purposes of statistics/logging)

the special case here spsc assume single producer , consumers:

  • size_type read_available() const;

    number of available elements can popped spsc_queue

  • size_type write_available() const;

    get write space write elements

note these only valid when used respective consumer/producer thread.


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