GOSTCoin CUDA miner project, compatible with most nvidia cards, containing only gostd algo
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/*
* Copyright 2008-2012 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*! \file thrust/system/cpp/memory.h
* \brief Managing memory associated with Thrust's standard C++ system.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/system/cpp/detail/execution_policy.h>
#include <thrust/memory.h>
#include <thrust/detail/type_traits.h>
#include <thrust/detail/allocator/malloc_allocator.h>
#include <ostream>
namespace thrust
{
namespace system
{
namespace cpp
{
template<typename> class pointer;
} // end cpp
} // end system
} // end thrust
/*! \cond
*/
// specialize std::iterator_traits to avoid problems with the name of
// pointer's constructor shadowing its nested pointer type
// do this before pointer is defined so the specialization is correctly
// used inside the definition
namespace std
{
template<typename Element>
struct iterator_traits<thrust::system::cpp::pointer<Element> >
{
private:
typedef thrust::system::cpp::pointer<Element> ptr;
public:
typedef typename ptr::iterator_category iterator_category;
typedef typename ptr::value_type value_type;
typedef typename ptr::difference_type difference_type;
typedef ptr pointer;
typedef typename ptr::reference reference;
}; // end iterator_traits
} // end std
/*! \endcond
*/
namespace thrust
{
namespace system
{
/*! \addtogroup system_backends Systems
* \ingroup system
* \{
*/
/*! \namespace thrust::system::cpp
* \brief \p thrust::system::cpp is the namespace containing functionality for allocating, manipulating,
* and deallocating memory available to Thrust's standard C++ backend system.
* The identifiers are provided in a separate namespace underneath <tt>thrust::system</tt>
* for import convenience but are also aliased in the top-level <tt>thrust::cpp</tt>
* namespace for easy access.
*
*/
namespace cpp
{
// forward declaration of reference for pointer
template<typename Element> class reference;
/*! \cond
*/
// XXX nvcc + msvc have trouble instantiating reference below
// this is a workaround
namespace detail
{
template<typename Element>
struct reference_msvc_workaround
{
typedef thrust::system::cpp::reference<Element> type;
}; // end reference_msvc_workaround
} // end detail
/*! \endcond
*/
/*! \p pointer stores a pointer to an object allocated in memory available to the cpp system.
* This type provides type safety when dispatching standard algorithms on ranges resident
* in cpp memory.
*
* \p pointer has pointer semantics: it may be dereferenced and manipulated with pointer arithmetic.
*
* \p pointer can be created with the function \p cpp::malloc, or by explicitly calling its constructor
* with a raw pointer.
*
* The raw pointer encapsulated by a \p pointer may be obtained by eiter its <tt>get</tt> member function
* or the \p raw_pointer_cast function.
*
* \note \p pointer is not a "smart" pointer; it is the programmer's responsibility to deallocate memory
* pointed to by \p pointer.
*
* \tparam T specifies the type of the pointee.
*
* \see cpp::malloc
* \see cpp::free
* \see raw_pointer_cast
*/
template<typename T>
class pointer
: public thrust::pointer<
T,
thrust::system::cpp::tag,
thrust::system::cpp::reference<T>,
thrust::system::cpp::pointer<T>
>
{
/*! \cond
*/
private:
typedef thrust::pointer<
T,
thrust::system::cpp::tag,
//thrust::system::cpp::reference<T>,
typename detail::reference_msvc_workaround<T>::type,
thrust::system::cpp::pointer<T>
> super_t;
/*! \endcond
*/
public:
// note that cpp::pointer's member functions need __host__ __device__
// to interoperate with nvcc + iterators' dereference member function
/*! \p pointer's no-argument constructor initializes its encapsulated pointer to \c 0.
*/
__host__ __device__
pointer() : super_t() {}
/*! This constructor allows construction of a <tt>pointer<const T></tt> from a <tt>T*</tt>.
*
* \param ptr A raw pointer to copy from, presumed to point to a location in memory
* accessible by the \p cpp system.
* \tparam OtherT \p OtherT shall be convertible to \p T.
*/
template<typename OtherT>
__host__ __device__
explicit pointer(OtherT *ptr) : super_t(ptr) {}
/*! This constructor allows construction from another pointer-like object with related type.
*
* \param other The \p OtherPointer to copy.
* \tparam OtherPointer The system tag associated with \p OtherPointer shall be convertible
* to \p thrust::system::cpp::tag and its element type shall be convertible to \p T.
*/
template<typename OtherPointer>
__host__ __device__
pointer(const OtherPointer &other,
typename thrust::detail::enable_if_pointer_is_convertible<
OtherPointer,
pointer
>::type * = 0) : super_t(other) {}
/*! Assignment operator allows assigning from another pointer-like object with related type.
*
* \param other The other pointer-like object to assign from.
* \tparam OtherPointer The system tag associated with \p OtherPointer shall be convertible
* to \p thrust::system::cpp::tag and its element type shall be convertible to \p T.
*/
template<typename OtherPointer>
__host__ __device__
typename thrust::detail::enable_if_pointer_is_convertible<
OtherPointer,
pointer,
pointer &
>::type
operator=(const OtherPointer &other)
{
return super_t::operator=(other);
}
}; // end pointer
/*! \p reference is a wrapped reference to an object stored in memory available to the \p cpp system.
* \p reference is the type of the result of dereferencing a \p cpp::pointer.
*
* \tparam T Specifies the type of the referenced object.
*/
template<typename T>
class reference
: public thrust::reference<
T,
thrust::system::cpp::pointer<T>,
thrust::system::cpp::reference<T>
>
{
/*! \cond
*/
private:
typedef thrust::reference<
T,
thrust::system::cpp::pointer<T>,
thrust::system::cpp::reference<T>
> super_t;
/*! \endcond
*/
public:
/*! \cond
*/
typedef typename super_t::value_type value_type;
typedef typename super_t::pointer pointer;
/*! \endcond
*/
/*! This constructor initializes this \p reference to refer to an object
* pointed to by the given \p pointer. After this \p reference is constructed,
* it shall refer to the object pointed to by \p ptr.
*
* \param ptr A \p pointer to copy from.
*/
__host__ __device__
explicit reference(const pointer &ptr)
: super_t(ptr)
{}
/*! This constructor accepts a const reference to another \p reference of related type.
* After this \p reference is constructed, it shall refer to the same object as \p other.
*
* \param other A \p reference to copy from.
* \tparam OtherT The element type of the other \p reference.
*
* \note This constructor is templated primarily to allow initialization of <tt>reference<const T></tt>
* from <tt>reference<T></tt>.
*/
template<typename OtherT>
__host__ __device__
reference(const reference<OtherT> &other,
typename thrust::detail::enable_if_convertible<
typename reference<OtherT>::pointer,
pointer
>::type * = 0)
: super_t(other)
{}
/*! Copy assignment operator copy assigns from another \p reference of related type.
*
* \param other The other \p reference to assign from.
* \return <tt>*this</tt>
* \tparam OtherT The element type of the other \p reference.
*/
template<typename OtherT>
reference &operator=(const reference<OtherT> &other);
/*! Assignment operator assigns from a \p value_type.
*
* \param x The \p value_type to assign from.
* \return <tt>*this</tt>
*/
reference &operator=(const value_type &x);
}; // end reference
/*! Exchanges the values of two objects referred to by \p reference.
* \p x The first \p reference of interest.
* \p y The second \p reference ot interest.
*/
template<typename T>
__host__ __device__
void swap(reference<T> x, reference<T> y);
/*! Allocates an area of memory available to Thrust's <tt>cpp</tt> system.
* \param n Number of bytes to allocate.
* \return A <tt>cpp::pointer<void></tt> pointing to the beginning of the newly
* allocated memory. A null <tt>cpp::pointer<void></tt> is returned if
* an error occurs.
* \note The <tt>cpp::pointer<void></tt> returned by this function must be
* deallocated with \p cpp::free.
* \see cpp::free
* \see std::malloc
*/
inline pointer<void> malloc(std::size_t n);
/*! Allocates a typed area of memory available to Thrust's <tt>cpp</tt> system.
* \param n Number of elements to allocate.
* \return A <tt>cpp::pointer<T></tt> pointing to the beginning of the newly
* allocated elements. A null <tt>cpp::pointer<T></tt> is returned if
* an error occurs.
* \note The <tt>cpp::pointer<T></tt> returned by this function must be
* deallocated with \p cpp::free.
* \see cpp::free
* \see std::malloc
*/
template<typename T>
inline pointer<T> malloc(std::size_t n);
/*! Deallocates an area of memory previously allocated by <tt>cpp::malloc</tt>.
* \param ptr A <tt>cpp::pointer<void></tt> pointing to the beginning of an area
* of memory previously allocated with <tt>cpp::malloc</tt>.
* \see cpp::malloc
* \see std::free
*/
inline void free(pointer<void> ptr);
// XXX upon c++11
// template<typename T> using allocator = thrust::detail::malloc_allocator<T,tag,pointer<T> >;
/*! \p cpp::allocator is the default allocator used by the \p cpp system's containers such as
* <tt>cpp::vector</tt> if no user-specified allocator is provided. \p cpp::allocator allocates
* (deallocates) storage with \p cpp::malloc (\p cpp::free).
*/
template<typename T>
struct allocator
: thrust::detail::malloc_allocator<
T,
tag,
pointer<T>
>
{
/*! The \p rebind metafunction provides the type of an \p allocator
* instantiated with another type.
*
* \tparam U The other type to use for instantiation.
*/
template<typename U>
struct rebind
{
/*! The typedef \p other gives the type of the rebound \p allocator.
*/
typedef allocator<U> other;
};
/*! No-argument constructor has no effect.
*/
__host__ __device__
inline allocator() {}
/*! Copy constructor has no effect.
*/
__host__ __device__
inline allocator(const allocator &) {}
/*! Constructor from other \p allocator has no effect.
*/
template<typename U>
__host__ __device__
inline allocator(const allocator<U> &) {}
/*! Destructor has no effect.
*/
__host__ __device__
inline ~allocator() {}
}; // end allocator
} // end cpp
/*! \}
*/
} // end system
/*! \namespace thrust::cpp
* \brief \p thrust::cpp is a top-level alias for thrust::system::cpp.
*/
namespace cpp
{
using thrust::system::cpp::pointer;
using thrust::system::cpp::reference;
using thrust::system::cpp::malloc;
using thrust::system::cpp::free;
using thrust::system::cpp::allocator;
} // end cpp
} // end thrust
#include <thrust/system/cpp/detail/memory.inl>