HostMemoryBlock.ipp

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#pragma once
 
#include "RenderCore/Memory/HostMemoryBlock.h"
#include "RenderCore/ghi_exceptions.h"
 
#include <Common/os.h>
#include <Common/math_basics.h>
 
#include <numeric>
#include <new>
#include <utility>
 
namespace ph::editor::ghi
{
 
inline HostMemoryBlock::HostMemoryBlock()
    : GraphicsMemoryBlock()
    , m_memoryBlock(nullptr)
{}
 
inline HostMemoryBlock::HostMemoryBlock(std::size_t blockSizeHintInBytes)
    : HostMemoryBlock(blockSizeHintInBytes, os::get_L1_cache_line_size_in_bytes())
{}
 
inline HostMemoryBlock::HostMemoryBlock(std::size_t blockSizeHintInBytes, std::size_t alignmentInBytes)
{
    const auto alignmentSize = std::lcm(alignof(std::max_align_t), alignmentInBytes);
    const auto blockSize = math::next_multiple(blockSizeHintInBytes, alignmentSize);
 
    m_memoryBlock = make_aligned_memory<std::byte>(blockSize, alignmentSize);
    if(!m_memoryBlock)
    {
        throw OutOfHostMemory{};
    }
 
    setBlockSource(m_memoryBlock.get(), blockSize);
}
 
inline HostMemoryBlock::HostMemoryBlock(HostMemoryBlock&& other) noexcept
    : HostMemoryBlock()
{
    swap(*this, other);
}
 
inline HostMemoryBlock& HostMemoryBlock::operator = (HostMemoryBlock&& rhs) noexcept
{
    swap(*this, rhs);
 
    return *this;
}
 
inline void swap(HostMemoryBlock& first, HostMemoryBlock& second) noexcept
{
    using std::swap;
 
    swap(static_cast<GraphicsMemoryBlock&>(first), static_cast<GraphicsMemoryBlock&>(second));
    swap(first.m_memoryBlock, second.m_memoryBlock);
}
 
}// end namespace ph::editor::ghi