| // Copyright (C) 2018-2023 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 } |
| // { dg-options "-pthread" } |
| // { dg-require-effective-target c++17 } |
| // { dg-require-effective-target pthread } |
| // { dg-require-gthreads "" } |
| |
| #include <memory_resource> |
| #include <future> |
| #include <testsuite_allocator.h> |
| #include <testsuite_hooks.h> |
| |
| void |
| test01() |
| { |
| __gnu_test::memory_resource test_mr; |
| std::pmr::synchronized_pool_resource smr(&test_mr); |
| |
| const std::size_t largest_pool = smr.options().largest_required_pool_block; |
| |
| auto do_alloc = [&smr](void*& p, size_t n) { |
| // perform some other allocations and deallocations on the same thread: |
| void* p2 = smr.allocate(n); |
| smr.deallocate(p2, n); |
| p2 = smr.allocate(n); |
| p = smr.allocate(n); |
| smr.deallocate(p2, n); |
| }; |
| auto do_dealloc = [&smr](void* p, size_t n) { smr.deallocate(p, n); }; |
| |
| void* p1; |
| void* p2; |
| void* p3; |
| auto f1 = std::async(std::launch::async, do_alloc, std::ref(p1), 8); |
| auto f2 = std::async(std::launch::async, do_alloc, std::ref(p2), 64); |
| auto f3 = std::async(std::launch::async, do_alloc, std::ref(p3), |
| largest_pool* 2); |
| |
| f1.get(); |
| f2.get(); |
| f3.get(); |
| VERIFY( p1 != nullptr ); |
| VERIFY( p2 != nullptr ); |
| VERIFY( p3 != nullptr ); |
| size_t nallocs = test_mr.number_of_active_allocations(); |
| VERIFY( nallocs >= 4 ); |
| |
| // deallocate on different threads from allocation: |
| f1 = std::async(std::launch::async, do_dealloc, p1, 8); |
| f2 = std::async(std::launch::async, do_dealloc, p2, 64); |
| f1.get(); |
| f2.get(); |
| // No additional memory is allocated by deallocating on new threads: |
| VERIFY( test_mr.number_of_active_allocations() == nallocs ); |
| |
| // Deallocate large unpooled allocation: |
| f3 = std::async(std::launch::async, do_dealloc, p3, largest_pool * 2); |
| f3.get(); |
| // The large allocation should have been returned upstream: |
| VERIFY( test_mr.number_of_active_allocations() == nallocs - 1 ); |
| |
| smr.release(); |
| VERIFY( test_mr.number_of_active_allocations() == 0 ); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| } |