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// ==========================================================================
// SeqAn - The Library for Sequence Analysis
// ==========================================================================
// Copyright (c) 2006-2018, Knut Reinert, FU Berlin
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of Knut Reinert or the FU Berlin nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL KNUT REINERT OR THE FU BERLIN BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.
//
// ==========================================================================
// Author: Andreas Gogol-Doering <andreas.doering@mdc-berlin.de>
// ==========================================================================
// Wrapper that adapts SeqAn allocators to STL allocators.
// ==========================================================================
// TODO(holtgrew): Rename STD to STL?
// TODO(holtgrew): Rename to allocator_to_stl.h, remove basic_ prefix of all other allocator headers.
#ifndef SEQAN_INCLUDE_SEQAN_BASIC_ALLOCATOR_TO_STD_H_
#define SEQAN_INCLUDE_SEQAN_BASIC_ALLOCATOR_TO_STD_H_
namespace seqan {
// ============================================================================
// Forwards
// ============================================================================
// ============================================================================
// Tags, Classes, Enums
// ============================================================================
/*!
* @class ToStdAllocator
* @headerfile <seqan/basic.h>
* @brief Emulates standard conform allocator.
*
* @signature template <typename THost, typename TValue>
* class ToStdAllocator;
*
* @tparam TValue Type of allocated items.
* @tparam THost Type of the host allocator object.This object is used to call @link Allocator#allocate @endlink and
* @link Allocator#deallocate @endlink.
*
* The member functions <tt>allocate</tt> and <tt>deallocate</tt> of <tt>ToStdAllocator</tt> call the (globale)
* functions @link Allocator#allocate @endlink and @link Allocator#deallocate @endlink, respectively. The globale
* functions get an allocator object as their first arguments. This allocator object is not the <tt>ToStdAllocator</tt>
* object itself, but the host object that was given to the constructor.
*
* @fn ToStdAllocator#ToStdAllocator
* @brief Constructor
*
* @signature ToStdAllocator::ToStdAllocator(host);
*
* @param[in] host The host object that is used as allocator for @link Allocator#allocate @endlink and @link
* Allocator#deallocate @endlink.
*/
template <typename THost, typename TValue>
struct ToStdAllocator
{
typedef TValue value_type; // nolint
typedef value_type * pointer; // nolint
typedef value_type & reference; // nolint
typedef value_type const * const_pointer; // nolint
typedef value_type const & const_reference; // nolint
typedef size_t size_type; // nolint
typedef ptrdiff_t difference_type; // nolint
ToStdAllocator(THost & host): m_host(& host)
{}
template <typename TValue2>
ToStdAllocator(ToStdAllocator<THost, TValue2> const & alloc)
: m_host(alloc.m_host)
{}
ToStdAllocator & operator= (ToStdAllocator const & alloc)
{
m_host = alloc.m_host;
return *this;
}
pointer allocate(size_type count)
{
value_type * ptr;
seqan::allocate(*m_host, ptr, count);
return pointer(ptr);
}
pointer allocate(size_type count, const void *)
{
value_type * ptr;
seqan::allocate(*m_host, ptr, count);
return pointer(ptr);
}
void deallocate(pointer data, size_type count)
{
seqan::deallocate(*m_host, data, count);
}
void construct(pointer ptr, const_reference data)
{
new(ptr) TValue(data);
}
void destroy(pointer ptr)
{
ptr->~TValue();
}
pointer address(reference value) const
{
return (&value);
}
const_pointer address(const_reference value) const
{
return (&value);
}
size_type max_size() const
{
return ~0UL / sizeof(value_type);
}
template <class TValue2>
struct rebind // nolint
{
typedef ToStdAllocator<THost, TValue2> other; // nolint
};
template <typename THost2, typename TValue2>
friend
struct ToStdAllocator;
private:
THost * m_host;
};
// ============================================================================
// Metafunctions
// ============================================================================
// ----------------------------------------------------------------------------
// Metafunction ToStdAllocator()
// ----------------------------------------------------------------------------
template <typename T, typename TData>
struct StdAllocator
{
typedef ToStdAllocator<T, TData> Type;
};
// ============================================================================
// Functions
// ============================================================================
// ----------------------------------------------------------------------------
// Function host()
// ----------------------------------------------------------------------------
/*!
* @fn ToStdAllocator#host
* @headerfile <seqan/basic.h>
* @brief The object a given object depends on.
*
* @signature THost host(allocator);
*
* @param[in] allocator The allocator to query.
*
* @return THost The host object.
*/
template <typename THost, typename TValue>
THost &
host(ToStdAllocator<THost, TValue> & me)
{
return *me.m_host;
}
} // namespace seqan
#endif // #ifndef SEQAN_INCLUDE_SEQAN_BASIC_ALLOCATOR_TO_STD_H_
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