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Further updates to mem_type

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This commit is contained in:
John Wellbelove 2021-05-26 22:04:34 +01:00
parent d8777dc2f6
commit 380fc59b2b
4 changed files with 287 additions and 154 deletions
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349
include/etl/experimental/mem_type.h
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@ -1,4 +1,35 @@
#pragma once
///\file
/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
Copyright(c) 2021 jwellbelove
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.
******************************************************************************/
#ifndef ETL_MEM_TYPE_INCLUDED
#define ETL_MEM_TYPE_INCLUDED
#include <stdint.h>
@ -6,181 +37,191 @@
#include "../memory.h"
#include "../static_assert.h"
//*****************************************************************************
/// mem_type
//*****************************************************************************
template <size_t Size_ , size_t Alignment_>
class mem_type
namespace etl
{
public:
static constexpr size_t Size = Size_;
static constexpr size_t Alignment = Alignment_;
//***********************************
template <size_t Other_Size, size_t Other_Alignment>
constexpr mem_type(const mem_type<Other_Size, Other_Alignment>& other)
//*****************************************************************************
/// mem_type
//*****************************************************************************
template <size_t Size_, size_t Alignment_>
class mem_type
{
ETL_STATIC_ASSERT(Size >= Other_Size, "Other size is too large");
ETL_STATIC_ASSERT(Alignment >= Other_Alignment, "Other alignment incompatible");
public:
memcpy(buffer, other.buffer, Size_);
}
static ETL_CONSTANT size_t Size = Size_;
static ETL_CONSTANT size_t Alignment = Alignment_;
//***********************************
template <typename T>
constexpr T& get()
//***********************************
ETL_CONSTEXPR mem_type()
{
}
//***********************************
template <size_t Other_Size, size_t Other_Alignment>
ETL_CONSTEXPR mem_type(const mem_type<Other_Size, Other_Alignment>& other)
{
ETL_STATIC_ASSERT(Size >= Other_Size, "Other size is too large");
ETL_STATIC_ASSERT(Alignment >= Other_Alignment, "Other alignment incompatible");
memcpy(buffer, other.buffer, Size_);
}
//***********************************
template <typename T>
ETL_CONSTEXPR T& get()
{
ETL_STATIC_ASSERT(sizeof(T) <= Size, "Size of T is too large");
ETL_STATIC_ASSERT(Alignment >= etl::alignment_of<T>::value, "Alignment of T is incompatible");
return *reinterpret_cast<T*>(buffer);
}
//***********************************
template <typename T>
ETL_CONSTEXPR const T& get() const
{
ETL_STATIC_ASSERT(sizeof(T) <= Size, "Size of T is too large");
ETL_STATIC_ASSERT(Alignment >= etl::alignment_of<T>::value, "Alignment of T is incompatible");
return *reinterpret_cast<T*>(buffer);
}
//***********************************
template <typename T>
ETL_CONSTEXPR operator T() const
{
ETL_STATIC_ASSERT(sizeof(T) <= Size, "Size of T is too large");
ETL_STATIC_ASSERT(Alignment >= etl::alignment_of<T>::value, "Alignment of T is incompatible");
return *reinterpret_cast<T*>(buffer);
}
//***********************************
template <size_t Other_Size, size_t Other_Alignment>
ETL_CONSTEXPR mem_type& operator =(const mem_type<Other_Size, Other_Alignment>& rhs)
{
ETL_STATIC_ASSERT(Size >= Other_Size, "RHS size is too large");
ETL_STATIC_ASSERT(Alignment >= Other_Alignment, "RHS alignment incompatible");
memcpy(buffer, rhs.buffer, Size_);
return *this;
}
//***********************************
ETL_CONSTEXPR size_t size() const
{
return Size;
}
//***********************************
ETL_CONSTEXPR size_t alignment() const
{
return Alignment;
}
//***********************************
ETL_CONSTEXPR char* data() const
{
return buffer;
}
private:
etl::aligned_storage<Size, Alignment> buffer;
};
//*****************************************************************************
/// mem_type_ptr
//*****************************************************************************
template <size_t Size_>
class mem_type_ptr
{
ETL_STATIC_ASSERT(sizeof(T) <= Size, "Size of T is too large");
ETL_STATIC_ASSERT(Alignment >= etl::alignment_of<T>::value, "Alignment of T is incompatible");
public:
return *reinterpret_cast<T*>(buffer);
}
static ETL_CONSTANT size_t Size = Size_;
//***********************************
template <typename T>
constexpr const T& get() const
{
ETL_STATIC_ASSERT(sizeof(T) <= Size, "Size of T is too large");
ETL_STATIC_ASSERT(Alignment >= etl::alignment_of<T>::value, "Alignment of T is incompatible");
//***********************************
ETL_CONSTEXPR mem_type_ptr()
: pbuffer(ETL_NULLPTR)
{
}
return *reinterpret_cast<T*>(buffer);
}
//***********************************
ETL_CONSTEXPR mem_type_ptr(char* pbuffer_)
: pbuffer(pbuffer_)
{
}
//***********************************
template <typename T>
constexpr operator T() const
{
ETL_STATIC_ASSERT(sizeof(T) <= Size, "Size of T is too large");
ETL_STATIC_ASSERT(Alignment >= etl::alignment_of<T>::value, "Alignment of T is incompatible");
//***********************************
template <size_t Other_Size>
ETL_CONSTEXPR mem_type_ptr(const mem_type_ptr<Other_Size>& other, char* pbuffer_)
: pbuffer(pbuffer_)
{
ETL_STATIC_ASSERT(Size >= Other_Size, "Other size is too large");
return *reinterpret_cast<T*>(buffer);
}
memcpy(buffer, other.buffer, Size_);
}
//***********************************
template <size_t Other_Size, size_t Other_Alignment>
constexpr mem_type& operator =(const mem_type<Other_Size, Other_Alignment>& rhs)
{
ETL_STATIC_ASSERT(Size >= Other_Size, "RHS size is too large");
ETL_STATIC_ASSERT(Alignment >= Other_Alignment, "RHS alignment incompatible");
//***********************************
void set(char* pbuffer_)
{
pbuffer = pbuffer_;
}
memcpy(buffer, rhs.buffer, Size_);
//***********************************
template <typename T>
ETL_CONSTEXPR T& get()
{
ETL_STATIC_ASSERT((uintptr_t(pbuffer) % etl::alignment_of<T>::value) == 0, "Alignment of T is incompatible");
return *this;
}
return *reinterpret_cast<T*>(pbuffer);
}
//***********************************
constexpr size_t size() const
{
return Size;
}
//***********************************
template <typename T>
ETL_CONSTEXPR const T& get() const
{
ETL_STATIC_ASSERT((uintptr_t(pbuffer) % etl::alignment_of<T>::value) == 0, "Alignment of T is incompatible");
//***********************************
constexpr size_t alignment() const
{
return Alignment;
}
return *reinterpret_cast<T*>(pbuffer);
}
//***********************************
constexpr char* data() const
{
return buffer;
}
//***********************************
template <typename T>
ETL_CONSTEXPR operator T() const
{
ETL_STATIC_ASSERT((uintptr_t(pbuffer) % etl::alignment_of<T>::value) == 0, "Alignment of T is incompatible");
private:
return *reinterpret_cast<T*>(pbuffer);
}
etl::aligned_storage<Size, Alignment> buffer;
};
//***********************************
template <size_t Other_Size>
mem_type_ptr& operator =(const mem_type_ptr<Other_Size>& rhs)
{
ETL_STATIC_ASSERT(Size >= Other_Size, "RHS size is too large");
//*****************************************************************************
/// mem_type_ptr
//*****************************************************************************
template <size_t Size_>
class mem_type_ptr
{
public:
memcpy(pbuffer, rhs.pbuffer, Size_);
static constexpr size_t Size = Size_;
return *this;
}
//***********************************
constexpr mem_type_ptr()
: pbuffer(ETL_NULLPTR)
{
}
//***********************************
ETL_CONSTEXPR size_t size() const
{
return Size;
}
//***********************************
constexpr mem_type_ptr(char* pbuffer_)
: pbuffer(pbuffer_)
{
}
//***********************************
ETL_CONSTEXPR char* data() const
{
return pbuffer;
}
//***********************************
template <size_t Other_Size>
constexpr mem_type_ptr(const mem_type_ptr<Other_Size& other, char* pbuffer_)
: pbuffer(pbuffer_)
{
ETL_STATIC_ASSERT(Size >= Other_Size, "Other size is too large");
private:
memcpy(buffer, other.buffer, Size_);
}
char* pbuffer;
};
}
//***********************************
void set(char* pbuffer_)
{
pbuffer = pbuffer_;
}
//***********************************
template <typename T>
constexpr T& get()
{
ETL_STATIC_ASSERT((uintptr_t(pbuffer) % etl::alignment_of<T>::value) == 0, "Alignment of T is incompatible");
return *reinterpret_cast<T*>(pbuffer);
}
//***********************************
template <typename T>
constexpr const T& get() const
{
ETL_STATIC_ASSERT((uintptr_t(pbuffer) % etl::alignment_of<T>::value) == 0, "Alignment of T is incompatible");
return *reinterpret_cast<T*>(pbuffer);
}
//***********************************
template <typename T>
constexpr operator T() const
{
ETL_STATIC_ASSERT((uintptr_t(pbuffer) % etl::alignment_of<T>::value) == 0, "Alignment of T is incompatible");
return *reinterpret_cast<T*>(pbuffer);
}
//***********************************
template <size_t Other_Size>
mem_type_ptr& operator =(const mem_type_ptr<Other_Size>& rhs)
{
ETL_STATIC_ASSERT(Size >= Other_Size, "RHS size is too large");
memcpy(pbuffer, rhs.pbuffer, Size_);
return *this;
}
//***********************************
constexpr size_t size() const
{
return Size;
}
//***********************************
constexpr char* data() const
{
return pbuffer;
}
private:
char* pbuffer;
};
#endif

88
test/test_mem_type.cpp Normal file
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@ -0,0 +1,88 @@
/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
Copyright(c) 2021 jwellbelove
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.
******************************************************************************/
#include "unit_test_framework.h"
#include "etl/experimental/mem_type.h"
#include "etl/largest.h"
#include <array>
#include <vector>
#include <algorithm>
#include <string>
namespace
{
struct Data
{
char c;
short s;
std::array<int, 10> a;
};
// Test variant types.
using MemType = etl::mem_type<etl::largest<char, double, Data>::size,
etl::largest<char, double, Data>::alignment>;
SUITE(test_mem_type)
{
TEST(test_alignment)
{
MemType memType;
CHECK(alignof(char) <= MemType::Alignment);
CHECK(alignof(short) <= MemType::Alignment);
CHECK(alignof(Data) <= MemType::Alignment);
CHECK(alignof(char) <= memType.Alignment);
CHECK(alignof(short) <= memType.Alignment);
CHECK(alignof(Data) <= memType.Alignment);
CHECK(alignof(char) <= memType.alignment());
CHECK(alignof(short) <= memType.alignment());
CHECK(alignof(Data) <= memType.alignment());
}
TEST(test_size)
{
MemType memType;
CHECK(sizeof(char) <= MemType::Size);
CHECK(sizeof(short) <= MemType::Size);
CHECK(sizeof(Data) <= MemType::Size);
CHECK(sizeof(char) <= memType.Size);
CHECK(sizeof(short) <= memType.Size);
CHECK(sizeof(Data) <= memType.Size);
CHECK(sizeof(char) <= memType.size());
CHECK(sizeof(short) <= memType.size());
CHECK(sizeof(Data) <= memType.size());
}
};
}

1
test/vs2019/etl.vcxproj
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@ -4495,6 +4495,7 @@
<ClCompile Include="..\test_list_shared_pool.cpp" />
<ClCompile Include="..\test_make_string.cpp" />
<ClCompile Include="..\test_mean.cpp" />
<ClCompile Include="..\test_mem_type.cpp" />
<ClCompile Include="..\test_message_packet.cpp" />
<ClCompile Include="..\test_message_router_registry.cpp" />
<ClCompile Include="..\test_multi_array.cpp" />

3
test/vs2019/etl.vcxproj.filters
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@ -2534,6 +2534,9 @@
<ClCompile Include="..\test_variant_new.cpp">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\test_mem_type.cpp">
<Filter>Source Files</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<None Include="..\..\library.properties">