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// Copyright (C) 2018-2022 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-do run { target c++17 } }
// { dg-require-cstdint "" }
#include <memory_resource>
#include <testsuite_allocator.h>
struct resource : __gnu_test::memory_resource
{
int allocate_calls = 0;
int deallocate_calls = 0;
void*
do_allocate(std::size_t bytes, std::size_t align) override
{
++allocate_calls;
return __gnu_test::memory_resource::do_allocate(bytes, align);
}
void
do_deallocate(void* p, std::size_t bytes, std::size_t align) override
{
++deallocate_calls;
__gnu_test::memory_resource::do_deallocate(p, bytes, align);
}
};
void
test01()
{
resource r;
// test that it's possible to deallocate after each of the constructors
{
std::pmr::monotonic_buffer_resource mr(&r);
auto p = mr.allocate(1024);
VERIFY( p != nullptr );
const std::uintptr_t pi = reinterpret_cast<std::uintptr_t>(p);
mr.deallocate(p, 1024);
VERIFY( r.deallocate_calls == 0 );
auto q = mr.allocate(1024);
VERIFY( q != nullptr );
VERIFY( pi != reinterpret_cast<std::uintptr_t>(q) );
mr.deallocate(q, 1024);
VERIFY( r.deallocate_calls == 0 );
}
VERIFY( r.deallocate_calls == r.allocate_calls );
VERIFY( r.number_of_active_allocations() == 0 );
{
r.deallocate_calls = r.allocate_calls = 0;
std::pmr::monotonic_buffer_resource mr(128, &r);
auto p = mr.allocate(64);
VERIFY( p != nullptr );
const std::uintptr_t pi = reinterpret_cast<std::uintptr_t>(p);
mr.deallocate(p, 64);
auto q = mr.allocate(1024);
VERIFY( q != nullptr );
VERIFY( p != q );
VERIFY( pi != reinterpret_cast<std::uintptr_t>(q) );
mr.deallocate(q, 1024);
VERIFY( r.deallocate_calls == 0 );
}
VERIFY( r.number_of_active_allocations() == 0 );
{
r.deallocate_calls = r.allocate_calls = 0;
unsigned char buf[64];
std::pmr::monotonic_buffer_resource mr((void*)buf, sizeof(buf), &r);
auto p = mr.allocate(64);
VERIFY( p != nullptr );
const std::uintptr_t pi = reinterpret_cast<std::uintptr_t>(p);
mr.deallocate(p, 64);
auto q = mr.allocate(1024);
VERIFY( q != nullptr );
VERIFY( p != q );
VERIFY( pi != reinterpret_cast<std::uintptr_t>(q) );
mr.deallocate(q, 1024);
VERIFY( r.deallocate_calls == 0 );
}
VERIFY( r.deallocate_calls == r.allocate_calls );
VERIFY( r.number_of_active_allocations() == 0 );
}
int
main()
{
test01();
}
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