vs10/bm/bmalloc.h

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#ifndef BMALLOC__H__INCLUDED__
#define BMALLOC__H__INCLUDED__
/*
Copyright(c) 2002-2009 Anatoliy Kuznetsov(anatoliy_kuznetsov at yahoo.com)

Permission is hereby granted, free of charge, to any person 
obtaining a copy of this software and associated documentation 
files (the "Software"), to deal in the Software without restriction, 
including without limitation the rights to use, copy, modify, merge, 
publish, distribute, sublicense, and/or sell copies of the Software, 
and to permit persons to whom the Software is furnished to do so, 
subject to the following conditions:

The above copyright notice and this permission notice shall be included 
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
OTHER DEALINGS IN THE SOFTWARE.

For more information please visit:  http://bmagic.sourceforge.net

*/

#include <stdlib.h>
#include <new>

namespace bm
{


class block_allocator
{
public:
    static bm::word_t* allocate(size_t n, const void *)
    {
        bm::word_t* ptr;
#if defined(BMSSE2OPT) || defined(BMSSE42OPT)
# ifdef _MSC_VER
        ptr = (bm::word_t*) ::_aligned_malloc(n * sizeof(bm::word_t), 16);
#else
        ptr = (bm::word_t*) ::_mm_malloc(n * sizeof(bm::word_t), 16);
# endif

#else  
        ptr = (bm::word_t*) ::malloc(n * sizeof(bm::word_t));
#endif
        if (!ptr)
        {
            throw std::bad_alloc();
        }
        return ptr;
    }

    static void deallocate(bm::word_t* p, size_t)
    {
#if defined(BMSSE2OPT) || defined(BMSSE42OPT)
# ifdef _MSC_VER
        ::_aligned_free(p);
#else
        ::_mm_free(p);
# endif

#else  
        ::free(p);
#endif
    }

};


// -------------------------------------------------------------------------

class ptr_allocator
{
public:
    static void* allocate(size_t n, const void *)
    {
        void* ptr = ::malloc(n * sizeof(void*));
        if (!ptr)
        {
            throw std::bad_alloc();
        }
        return ptr;
    }

    static void deallocate(void* p, size_t)
    {
        ::free(p);
    }
};

// -------------------------------------------------------------------------

template<class BA, class PA> class mem_alloc
{
public:
    typedef BA  block_allocator_type;
    typedef PA  ptr_allocator_type;

public:

    mem_alloc(const BA& block_alloc = BA(), const PA& ptr_alloc = PA())
    : block_alloc_(block_alloc),
      ptr_alloc_(ptr_alloc)
    {}
    
    block_allocator_type get_block_allocator() const 
    { 
        return BA(block_alloc_); 
    }

    ptr_allocator_type get_ptr_allocator() const 
    { 
       return PA(block_alloc_); 
    }


    bm::word_t* alloc_bit_block(unsigned alloc_factor = 1)
    {
        return block_alloc_.allocate(bm::set_block_size * alloc_factor, 0);
    }

    void free_bit_block(bm::word_t* block, unsigned alloc_factor = 1)
    {
        if (IS_VALID_ADDR(block)) 
            block_alloc_.deallocate(block, bm::set_block_size * alloc_factor);
    }

    bm::gap_word_t* alloc_gap_block(unsigned level, 
                                    const gap_word_t* glevel_len)
    {
        BM_ASSERT(level < bm::gap_levels);
        unsigned len = 
            glevel_len[level] / (sizeof(bm::word_t) / sizeof(gap_word_t));

        return (bm::gap_word_t*)block_alloc_.allocate(len, 0);
    }

    void free_gap_block(bm::gap_word_t*   block,
                        const gap_word_t* glevel_len)
    {
        BM_ASSERT(IS_VALID_ADDR((bm::word_t*)block));
         
        unsigned len = gap_capacity(block, glevel_len);
        len /= sizeof(bm::word_t) / sizeof(bm::gap_word_t);
        block_alloc_.deallocate((bm::word_t*)block, len);        
    }

    void* alloc_ptr(unsigned size = bm::set_array_size)
    {
        return ptr_alloc_.allocate(size, 0);
    }

    void free_ptr(void* p, unsigned size = bm::set_array_size)
    {
        if (p)
            ptr_alloc_.deallocate(p, size);
    }
private:
    BA            block_alloc_;
    PA            ptr_alloc_;
};

typedef mem_alloc<block_allocator, ptr_allocator> standard_allocator;

} // namespace bm


#endif