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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
* 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.
*
* ************************************************************************ */
#pragma once
#include <new>
//!
//! @brief Host free memory w/o swap. Returns kB or -1 if unknown.
//!
ptrdiff_t host_bytes_available();
//!
//! @brief Return rough estimate of memory used via host_ helper APIs only.
//!
size_t host_bytes_allocated();
//!
//! @brief Allocates memory which can be freed with free. Returns nullptr if swap required.
//!
void* host_malloc(size_t size);
//!
//! @brief Allocates memory which can be freed with free. Throws exception if swap required.
//!
inline void* host_malloc_throw(size_t nmemb, size_t size)
{
void* ptr = host_malloc(nmemb * size);
if(!ptr)
{
throw std::bad_alloc{};
}
return ptr;
}
//!
//! @brief Allocates cleared memory which can be freed with free. Returns nullptr if swap required.
//!
void* host_calloc(size_t nmemb, size_t size);
//!
//! @brief Allocates cleared memory which can be freed with free. Throws exception if swap required.
//!
inline void* host_calloc_throw(size_t nmemb, size_t size)
{
void* ptr = host_calloc(nmemb, size);
if(!ptr)
{
throw std::bad_alloc{};
}
return ptr;
}
//!
//! @brief Release memory allocated with host_ prefixed allocators
//!
void host_free(void* ptr);
//!
//! @brief Allocator which allocates with host_calloc
//!
template <class T>
struct host_memory_allocator
{
using value_type = T;
host_memory_allocator() = default;
template <class U>
host_memory_allocator(const host_memory_allocator<U>&)
{
}
T* allocate(std::size_t n)
{
return (T*)host_malloc_throw(n, sizeof(T));
}
void deallocate(T* ptr, std::size_t n)
{
host_free(ptr);
}
};
template <class T, class U>
constexpr bool operator==(const host_memory_allocator<T>&, const host_memory_allocator<U>&)
{
return true;
}
template <class T, class U>
constexpr bool operator!=(const host_memory_allocator<T>&, const host_memory_allocator<U>&)
{
return false;
}
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