[boost] [pool] Definition of a static_pool ?

Subject: [boost] [pool] Definition of a static_pool ?
From: DUPUIS Etienne (e.dupuis_at_[hidden])
Date: 2012-04-24 06:35:52

Greetings,

The Boost.Pool class describes a pool of buffer, pool whose size grows as needed.

This is very convenient but there usage cases where the pool should not perform any dynamic memory allocation, i.e. the maximum number of simultaneously required buffers is known at initialization. I have hence defined a simple class 'static_pool' (see below), which
(i) allocate all requested buffers at initialization;
(ii) fails (returns null) if more buffers are being asked for at runtime.

Does such a class has its place within the Boost Pool library ?

Regards,
Étienne

#ifndef BOOST_STATIC_POOL_HPP
#define BOOST_STATIC_POOL_HPP

#include <boost/pool/pool.hpp>

namespace boost
{

template<typename UserAllocator>
class static_pool : protected pool<UserAllocator> {
    public :  // Overridden functions
        explicit static_pool(const size_type nrequested_size) : pool<UserAllocator>(nrequested_size, nrequested_size)
            { free(malloc()); }

        void * malloc()
            { return store().empty() ? NULL : store().malloc(); }

    public :  // Inherited functions
        void free(void * const chunk)
            { return pool<UserAllocator>::free(chunk); }

        size_type get_requested_size() const
            { return pool<UserAllocator>::get_requestedSize(); }

        bool is_from(void * const chunk) const
            { return pool<UserAllocator>::is_from(chunk); } };

}

#endif

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