RE: [Boost-Users] Problem with boost::pool_alloc

From: scleary_at_[hidden]
Date: 2003-04-11 10:33:50

> -----Original Message-----
> From: Ilya Chvetsov(work) [mailto:chvetsov_at_[hidden]]
> 
>         Hi!
>  I  try  to  use  boost::pool_alloc  with  STLport-4.5-0119  snapshot.
> STLPort  call  pool_alloc::allocate(const  size_type  n)  with  n = 0.
> STLPort  naitive  allocator  returns in such case NULL, but pool_alloc
> tries return memory.

Hmmm...  You seem to have uncovered a corner case, not covered by the
Standard requirements.  I will change the pool_allocator (and
fast_pool_allocator) to be able to handle this by returning NULL.

> Method simple_segregated_storage<SizeType>::try_malloc_n(
>     void  *  & start, size_type n, const size_type partition_size) has
> problem too if parameter n is 0. Problem is in while condition:
> while (--n != 0)...

This is correct; (n > 0) is a precondition for that function.

        -Steve