Re: [boost] Using boost::circular_buffer in boost::interprocess:managed_shared_memory

Subject: Re: [boost] Using boost::circular_buffer in boost::interprocess:managed_shared_memory
From: Taewan Kim (akatkim_at_[hidden])
Date: 2010-01-13 15:03:06

It does not work, I guess, because it tries to convert offset pointer to
void* as seen below. Can it be change to make it interprocess compliant in
the future?

Regards,

Taewan

boost_1_41_0/boost/circular_buffer/base.hpp: In member function ‘typename
Alloc::pointer boost::circular_buffer<T, Alloc>::allocate(typename
Alloc::size_type) [with T = int, Alloc = boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’:
boost_1_41_0/boost/circular_buffer/base.hpp:2087:   instantiated from ‘void
boost::circular_buffer<T, Alloc>::initialize_buffer(typename
Alloc::size_type) [with T = int, Alloc = boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’
boost_1_41_0/boost/circular_buffer/base.hpp:1011:   instantiated from
‘boost::circular_buffer<T, Alloc>::circular_buffer(typename
Alloc::size_type, const Alloc&) [with T = int, Alloc =
boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’
boost_1_41_0/boost/preprocessor/iteration/detail/local.hpp:40:
instantiated from ‘void boost::interprocess::detail::Ctor2Arg<T,
is_iterator, P0, P1>::construct(void*, boost::interprocess::detail::false_)
[with T = boost::circular_buffer<int, boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> > >, bool is_iterator = false, P0 = int, P1
= boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’
boost_1_41_0/boost/preprocessor/iteration/detail/local.hpp:40:
instantiated from ‘void boost::interprocess::detail::Ctor2Arg<T,
is_iterator, P0, P1>::construct_n(void*, size_t, size_t&) [with T =
boost::circular_buffer<int, boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> > >, bool is_iterator = false, P0 = int, P1
= boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’
dccircularbufferapp.cpp:151:   instantiated from here
boost_1_41_0/boost/circular_buffer/base.hpp:2014: error: cannot convert
‘boost::interprocess::offset_ptr<int>’ to ‘void*’ for argument ‘1’ to ‘void*
memset(void*, int, size_t)’
boost_1_41_0/boost/circular_buffer/base.hpp: In member function ‘void
boost::circular_buffer<T, Alloc>::destroy_item(typename Alloc::pointer)
[with T = int, Alloc = boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’:
boost_1_41_0/boost/circular_buffer/base.hpp:2070:   instantiated from ‘void
boost::circular_buffer<T, Alloc>::destroy_content() [with T = int, Alloc =
boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’
boost_1_41_0/boost/circular_buffer/base.hpp:2075:   instantiated from ‘void
boost::circular_buffer<T, Alloc>::destroy() [with T = int, Alloc =
boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’
boost_1_41_0/boost/circular_buffer/base.hpp:1172:   instantiated from
‘boost::circular_buffer<T, Alloc>::~circular_buffer() [with T = int, Alloc =
boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> >]’
boost_1_41_0/boost/interprocess/detail/in_place_interface.hpp:56:
instantiated from ‘void
boost::interprocess::detail::placement_destroy<T>::destroy_n(void*, size_t,
size_t&) [with T = boost::circular_buffer<int,
boost::interprocess::allocator<int,
boost::interprocess::segment_manager<char,
boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family,
boost::interprocess::offset_ptr<void>, 0ul>,
boost::interprocess::iset_index> > >]’
dccircularbufferapp.cpp:151:   instantiated from here
boost_1_41_0/boost/circular_buffer/base.hpp:2057: error: cannot convert
‘boost::interprocess::offset_ptr<int>’ to ‘void*’ for argument ‘1’ to ‘void*
memset(void*, int, size_t)’

On Wed, Jan 13, 2010 at 5:45 AM, Jan Gaspar <jano_gaspar_at_[hidden]> wrote:

> Actually I never tried using circular_buffer in conjuction with
> Interprocess library. But I think it should work. IMO the buffer obeys the
> Intrprocess container rules:
>
> * Boost.Interprocess STL containers don't assume that memory allocated with
> an allocator can be deallocated with other allocator of the same type. They
> always compare allocators with operator==() to know if this is possible.
> * The pointers of the internal structures of the Boost.Interprocess
> containers are of the same type the pointer type defined by the allocator of
> the container. This allows placing containers in managed memory segments
> mapped in different base addresses.
>
>
> Passing an interprocess allocator to the circular_buffer will make elements
> (stored in the circular_buffer) to be allocated in the shared memory - but
> not the circular_buffer itself. You need to create the circular_buffer in
> the shared memory as well. Have a look at the vector example to find out how
> to do it:
>
>
> http://www.boost.org/doc/libs/1_41_0/doc/html/interprocess/allocators_containers.html#interprocess.allocators_containers.containers_explained
>
> Let me know if it worked.
>
> Regards,
> Jan
>
>
>
>
> ----- Original Message ----
> From: Taewan Kim <akatkim_at_[hidden]>
> To: boost_at_[hidden]
> Sent: Tue, 12 January, 2010 23:11:26
> Subject: [boost] Using boost::circular_buffer in
> boost::interprocess:managed_shared_memory
>
> Can boost::circular_buffer be allocated in
> boost::interprocess:managed_shared_memory by passing an Interprocess
> aloocator to the constructor of boost::circular_buffer?
> _______________________________________________
> Unsubscribe & other changes:
> http://lists.boost.org/mailman/listinfo.cgi/boost
>
>
>
>
>
> _______________________________________________
> Unsubscribe & other changes:
> http://lists.boost.org/mailman/listinfo.cgi/boost
>