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/* ************************************************************************
* Copyright (C) 2018-2024 Advanced Micro Devices, Inc. All rights reserved.
*
* 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 cop-
* ies 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 IM-
* PLIED, 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 CONNE-
* CTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* ************************************************************************ */
#pragma once
#include <cmath>
#include <type_traits>
#include <vector>
#include "host_alloc.hpp"
//!
//! @brief Pseudo-vector subclass which uses host memory.
//!
template <typename T>
struct host_vector : std::vector<T, host_memory_allocator<T>>
{
// Inherit constructors
using std::vector<T, host_memory_allocator<T>>::vector;
//!
//! @brief Constructor.
//! @param inc Element index increment. If zero treated as one
//!
host_vector(size_t n, int64_t inc = 1)
: std::vector<T, host_memory_allocator<T>>(calculate_nmemb(n, inc))
, m_n(n)
, m_inc(inc ? inc : 1)
{
}
//!
//! @brief Copy constructor from host_vector of other types convertible to T
//!
template <typename U, std::enable_if_t<std::is_convertible<U, T>{}, int> = 0>
host_vector(const host_vector<U>& x)
: std::vector<T, host_memory_allocator<T>>(x.size())
, m_n(x.size())
, m_inc(1)
{
for(size_t i = 0; i < m_n; ++i)
(*this)[i] = x[i];
}
//!
//! @brief Decay into pointer wherever pointer is expected
//!
operator T*()
{
return this->data();
}
//!
//! @brief Decay into constant pointer wherever constant pointer is expected
//!
operator const T*() const
{
return this->data();
}
//!
//! @brief Allow signed indices
//!
inline T& operator[](int64_t idx)
{
return std::vector<T, host_memory_allocator<T>>::operator[]((size_t)idx);
}
inline const T& operator[](int64_t idx) const
{
return std::vector<T, host_memory_allocator<T>>::operator[]((size_t)idx);
}
//!
//! @brief Transfer from a device vector.
//! @param that That device vector.
//! @return the hip error.
//!
hipError_t transfer_from(const device_vector<T>& that)
{
hipError_t hip_err;
if(that.use_HMM && hipSuccess != (hip_err = hipDeviceSynchronize()))
return hip_err;
return hipMemcpy(*this,
that,
sizeof(T) * this->size(),
that.use_HMM ? hipMemcpyHostToHost : hipMemcpyDeviceToHost);
}
//!
//! @brief Returns the length of the vector.
//!
size_t n() const
{
return m_n;
}
//!
//! @brief Returns the increment of the vector.
//!
int64_t inc() const
{
return m_inc;
}
//!
//! @brief Returns the batch count (always 1).
//!
static constexpr rocblas_int batch_count()
{
return 1;
}
//!
//! @brief Returns the stride (out of context, always 0)
//!
static constexpr rocblas_stride stride()
{
return 0;
}
//!
//! @brief Check if memory exists (out of context, always hipSuccess)
//!
static constexpr hipError_t memcheck()
{
return hipSuccess;
}
private:
size_t m_n = 0;
int64_t m_inc = 0;
static size_t calculate_nmemb(size_t n, int64_t inc)
{
return 1 + ((n ? n : 1) - 1) * std::abs(inc ? inc : 1);
}
};
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