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// Copyright (C) 2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-options "-std=gnu++17" }
// { dg-do run { target c++17 } }
#include <new>
#include <memory>
#include <testsuite_hooks.h>
struct Test
{
Test(std::size_t size, std::size_t a)
: size(size), alignment(std::align_val_t{a}),
p(::operator new(size, alignment))
{ }
~Test() { ::operator delete(p, size, alignment); }
std::size_t size;
std::align_val_t alignment;
void* p;
bool valid() const { return p != nullptr; }
bool aligned() const
{
auto ptr = p;
auto space = size;
return std::align((std::size_t)alignment, size, ptr, space) == p;
}
};
// operator new(size_t size, align_val_t alignment) has
// undefined behaviour if the alignment argument is not
// a valid alignment value (i.e. not a power of two).
//
// Unlike posix_memalign there is no requirement that
// alignment >= sizeof(void*).
//
// Unlike aligned_alloc there is no requirement that
// size is an integer multiple of alignment.
void
test01()
{
// Test small values that would not be valid for
// posix_memalign or aligned_alloc.
Test t11{1, 1};
VERIFY( t11.valid() );
VERIFY( t11.aligned() );
Test t21{2, 1};
VERIFY( t21.valid() );
VERIFY( t21.aligned() );
Test t12{1, 2};
VERIFY( t12.valid() );
VERIFY( t12.aligned() );
Test t22{2, 2};
VERIFY( t22.valid() );
VERIFY( t22.aligned() );
Test t32{3, 2};
VERIFY( t32.valid() );
VERIFY( t32.aligned() );
Test t42{4, 2};
VERIFY( t42.valid() );
VERIFY( t42.aligned() );
Test t24{2, 4};
VERIFY( t24.valid() );
VERIFY( t24.aligned() );
Test t34{3, 4};
VERIFY( t34.valid() );
VERIFY( t34.aligned() );
Test t44{4, 4};
VERIFY( t44.valid() );
VERIFY( t44.aligned() );
// Test some larger values.
Test t128_16{128, 16};
VERIFY( t128_16.valid() );
VERIFY( t128_16.aligned() );
Test t128_64{128, 64};
VERIFY( t128_64.valid() );
VERIFY( t128_64.aligned() );
Test t64_128{64, 128};
VERIFY( t64_128.valid() );
VERIFY( t64_128.aligned() );
}
int
main()
{
test01();
}
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