74 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// UNSUPPORTED: no-exceptions10// UNSUPPORTED: no-threads11// UNSUPPORTED: c++0312 13// <future>14 15// class shared_future<R>16 17// ~shared_future();18 19#include <future>20#include <cassert>21 22#include "test_macros.h"23#include "test_allocator.h"24 25int main(int, char**)26{27 test_allocator_statistics alloc_stats;28 assert(alloc_stats.alloc_count == 0);29 {30 typedef int T;31 std::shared_future<T> f;32 {33 std::promise<T> p(std::allocator_arg, test_allocator<T>(&alloc_stats));34 assert(alloc_stats.alloc_count == 1);35 f = p.get_future();36 assert(alloc_stats.alloc_count == 1);37 assert(f.valid());38 }39 assert(alloc_stats.alloc_count == 1);40 assert(f.valid());41 }42 assert(alloc_stats.alloc_count == 0);43 {44 typedef int& T;45 std::shared_future<T> f;46 {47 std::promise<T> p(std::allocator_arg, test_allocator<int>(&alloc_stats));48 assert(alloc_stats.alloc_count == 1);49 f = p.get_future();50 assert(alloc_stats.alloc_count == 1);51 assert(f.valid());52 }53 assert(alloc_stats.alloc_count == 1);54 assert(f.valid());55 }56 assert(alloc_stats.alloc_count == 0);57 {58 typedef void T;59 std::shared_future<T> f;60 {61 std::promise<T> p(std::allocator_arg, test_allocator<T>(&alloc_stats));62 assert(alloc_stats.alloc_count == 1);63 f = p.get_future();64 assert(alloc_stats.alloc_count == 1);65 assert(f.valid());66 }67 assert(alloc_stats.alloc_count == 1);68 assert(f.valid());69 }70 assert(alloc_stats.alloc_count == 0);71 72 return 0;73}74