michaelh/zephyr
1
0
Fork 0
Code Releases Activity

cpp: Add C++20 [[nodiscard]] attribute to operator new

Browse source 
C++20 standard added [[nodiscard]] attribute to operator new
definitions. In case value returned by operator new is ignored,
compiler emits a warning.

The commit adds the attribute to operator new definitions.

Signed-off-by: Piotr Pryga <piotr.pryga@nordicsemi.no>
This commit is contained in:
Piotr Pryga 2022-09-15 18:47:05 +02:00 • committed by Carles Cufí
commit 9f56e3d8a5
1 changed files with 16 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

26
subsys/cpp/cpp_new.cpp
View file

@ -13,45 +13,51 @@
#define NOEXCEPT noexcept
#endif /* __cplusplus */
void* operator new(size_t size)
#if __cplusplus < 202002L
#define NODISCARD
#else
#define NODISCARD [[nodiscard]]
#endif /* __cplusplus */
NODISCARD void* operator new(size_t size)
{
return malloc(size);
}
void* operator new[](size_t size)
NODISCARD void* operator new[](size_t size)
{
return malloc(size);
}
void* operator new(std::size_t size, const std::nothrow_t& tag) NOEXCEPT
NODISCARD void* operator new(std::size_t size, const std::nothrow_t& tag) NOEXCEPT
{
return malloc(size);
}
void* operator new[](std::size_t size, const std::nothrow_t& tag) NOEXCEPT
NODISCARD void* operator new[](std::size_t size, const std::nothrow_t& tag) NOEXCEPT
{
return malloc(size);
}
#if __cplusplus >= 201703L
void* operator new(size_t size, std::align_val_t al)
NODISCARD void* operator new(size_t size, std::align_val_t al)
{
return aligned_alloc(static_cast<size_t>(al), size);
}
void* operator new[](std::size_t size, std::align_val_t al)
NODISCARD void* operator new[](std::size_t size, std::align_val_t al)
{
return aligned_alloc(static_cast<size_t>(al), size);
}
void* operator new(std::size_t size, std::align_val_t al,
const std::nothrow_t&) NOEXCEPT
NODISCARD void* operator new(std::size_t size, std::align_val_t al,
const std::nothrow_t&) NOEXCEPT
{
return aligned_alloc(static_cast<size_t>(al), size);
}
void* operator new[](std::size_t size, std::align_val_t al,
const std::nothrow_t&) NOEXCEPT
NODISCARD void* operator new[](std::size_t size, std::align_val_t al,
const std::nothrow_t&) NOEXCEPT
{
return aligned_alloc(static_cast<size_t>(al), size);
}