File indexing completed on 2024-04-21 05:41:33

 /*
     SPDX-FileCopyrightText: 2014-2017 Milian Wolff <mail@milianw.de>
 
     SPDX-License-Identifier: LGPL-2.1-or-later
 */
 
 #include <future>
 #include <thread>
 #include <vector>
 
 using namespace std;
 
 const int ALLOCS_PER_THREAD = 1000;
 
 int** alloc()
 {
     int** block = new int*[ALLOCS_PER_THREAD];
     for (int i = 0; i < ALLOCS_PER_THREAD; ++i) {
         block[i] = new int;
     }
     return block;
 }
 
 void dealloc(future<int**>&& f)
 {
     int** block = f.get();
     for (int i = 0; i < ALLOCS_PER_THREAD; ++i) {
         delete block[i];
     }
     delete[] block;
 }
 
 int main()
 {
     vector<future<void>> futures;
     futures.reserve(100 * 4);
     for (int i = 0; i < 100; ++i) {
         auto f1 = async(launch::async, alloc);
         auto f2 = async(launch::async, alloc);
         auto f3 = async(launch::async, alloc);
         auto f4 = async(launch::async, alloc);
         futures.emplace_back(async(launch::async, dealloc, std::move(f1)));
         futures.emplace_back(async(launch::async, dealloc, std::move(f2)));
         futures.emplace_back(async(launch::async, dealloc, std::move(f3)));
         futures.emplace_back(async(launch::async, dealloc, std::move(f4)));
     }
     return 0;
 }