[boost] [pool] Is it even possible to call release_memory() for map/list allocator pools portably?

From: Scott (cheesy4poofs_at_[hidden])
Date: 2007-10-22 14:57:40

I have a map, declared as:

typedef std::pair<int, HintPage *> PageCachePair;
typedef boost::fast_pool_allocator<PageCachePair> PageCacheAllocator;
typedef std::map<int, HintPage *, std::less<int>, PageCacheAllocator>
PageCache;

The problem is when I try to call:

boost::singleton_pool<boost::fast_pool_allocator_tag,
sizeof(PageCachePair)>::purge_memory();

This always returns false.  The real problem (of course) is that
sizeof(PageCachePair) is incorrect.  The real size is determined by the
rebind mechanism for the actual map node struct.  However, I have no idea
how to portably determine that size.

Is it even possible to do this?

Scott