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Diffstat (limited to 'libstdc++-v3/testsuite/30_threads/promise/60966.cc')
-rw-r--r-- | libstdc++-v3/testsuite/30_threads/promise/60966.cc | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/30_threads/promise/60966.cc b/libstdc++-v3/testsuite/30_threads/promise/60966.cc new file mode 100644 index 00000000000..269268b989b --- /dev/null +++ b/libstdc++-v3/testsuite/30_threads/promise/60966.cc @@ -0,0 +1,67 @@ +// { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* powerpc-ibm-aix* } } +// { dg-options " -std=gnu++11 -pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* powerpc-ibm-aix* } } +// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } } +// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-darwin* } } +// { dg-require-cstdint "" } +// { dg-require-gthreads "" } +// { dg-require-atomic-builtins "" } + +// Copyright (C) 2014 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/>. + +// libstdc++/60966 +// This test hangs if std::promise::~promise() destroys the +// shared state before std::promise::set_value() finishes using it. + +#include <future> +#include <thread> +#include <vector> + +const int THREADS = 10; + +void run_task(std::promise<void>* pr) +{ + std::this_thread::sleep_for(std::chrono::milliseconds(100)); + pr->set_value(); +} + +int main() +{ + std::vector<std::promise<void>*> tasks(THREADS); + std::vector<std::thread> threads(THREADS); + std::vector<std::future<void>> futures(THREADS); + + for (int i = 0; i < THREADS; ++i) + { + std::promise<void>* task = new std::promise<void>; + tasks[i] = task; + futures[i] = task->get_future(); + threads[i] = std::thread(run_task, task); + } + + for (int i = 0; i < THREADS; ++i) + { + // the temporary future releases the state as soon as wait() returns + std::future<void>(std::move(futures[i])).wait(); + // state is ready, should now be safe to delete promise, so it + // releases the shared state too + delete tasks[i]; + } + + for (auto& t : threads) + t.join(); +} |