libcruft-util/alloc/malloc.hpp

57 lines
1.3 KiB
C++

/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Copyright 2018 Danny Robson <danny@nerdcruft.net>
*/
#pragma once
#include "../view.hpp"
#include <cstddef>
#include <cstdlib>
#if defined(PLATFORM_WIN32)
inline int
posix_memalign (void **ptr, std::size_t align, std::size_t size)
{
*ptr = _aligned_malloc (size, align);
return *ptr ? 0 : errno;
}
#endif
namespace cruft::alloc {
class malloc {
public:
template <typename T>
cruft::view<T*> allocate (size_t count)
{
return {
reinterpret_cast<T*> (malloc (sizeof (T) * count)),
count
};
}
template <typename T>
cruft::view<T*>
allocate (size_t count, size_t align)
{
void* ptr;
posix_memalign (&ptr, align, sizeof (T) * count);
if (!ptr)
throw std::bad_alloc ();
return { reinterpret_cast<T*> (ptr), count };
}
template <typename T>
void
deallocate (cruft::view<std::byte*> ptr)
{
::free (ptr.data ());
}
};
}