54da338f59
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@112500 91177308-0d34-0410-b5e6-96231b3b80d8
106 lines
2.3 KiB
C++
106 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <future>
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// class packaged_task<R(ArgTypes...)>
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// void operator()(ArgTypes... args);
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#include <future>
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#include <cassert>
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class A
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{
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long data_;
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public:
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explicit A(long i) : data_(i) {}
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long operator()(long i, long j) const
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{
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if (j == 'z')
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throw A(6);
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return data_ + i + j;
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}
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};
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void func0(std::packaged_task<double(int, char)>& p)
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(500));
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p(3, 'a');
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}
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void func1(std::packaged_task<double(int, char)>& p)
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(500));
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p(3, 'z');
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}
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void func2(std::packaged_task<double(int, char)>& p)
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{
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p(3, 'a');
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try
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{
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p(3, 'c');
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}
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catch (const std::future_error& e)
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{
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assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied));
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}
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}
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void func3(std::packaged_task<double(int, char)>& p)
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{
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try
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{
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p(3, 'a');
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}
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catch (const std::future_error& e)
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{
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assert(e.code() == make_error_code(std::future_errc::no_state));
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}
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}
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int main()
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{
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{
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std::packaged_task<double(int, char)> p(A(5));
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std::future<double> f = p.get_future();
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std::thread(func0, std::move(p)).detach();
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assert(f.get() == 105.0);
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}
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{
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std::packaged_task<double(int, char)> p(A(5));
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std::future<double> f = p.get_future();
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std::thread(func1, std::move(p)).detach();
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try
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{
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f.get();
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assert(false);
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}
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catch (const A& e)
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{
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assert(e(3, 'a') == 106);
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}
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}
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{
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std::packaged_task<double(int, char)> p(A(5));
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std::future<double> f = p.get_future();
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std::thread t(func2, std::move(p));
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assert(f.get() == 105.0);
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t.join();
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}
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{
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std::packaged_task<double(int, char)> p;
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std::thread t(func3, std::move(p));
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t.join();
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}
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}
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