Howard Hinnant | 54da338 | 2010-08-30 18:46:21 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Howard Hinnant | b64f8b0 | 2010-11-16 22:09:02 +0000 | [diff] [blame] | 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
Howard Hinnant | 54da338 | 2010-08-30 18:46:21 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
Jonathan Roelofs | 8d86b2e | 2014-09-05 19:45:05 +0000 | [diff] [blame] | 9 | // |
| 10 | // UNSUPPORTED: libcpp-has-no-threads |
Howard Hinnant | 54da338 | 2010-08-30 18:46:21 +0000 | [diff] [blame] | 11 | |
| 12 | // <future> |
| 13 | |
| 14 | // class packaged_task<R(ArgTypes...)> |
| 15 | |
| 16 | // template <class F> |
| 17 | // explicit packaged_task(F&& f); |
| 18 | |
| 19 | #include <future> |
| 20 | #include <cassert> |
| 21 | |
| 22 | class A |
| 23 | { |
| 24 | long data_; |
| 25 | |
| 26 | public: |
| 27 | static int n_moves; |
| 28 | static int n_copies; |
| 29 | |
| 30 | explicit A(long i) : data_(i) {} |
| 31 | A(A&& a) : data_(a.data_) {++n_moves; a.data_ = -1;} |
| 32 | A(const A& a) : data_(a.data_) {++n_copies;} |
| 33 | |
| 34 | long operator()(long i, long j) const {return data_ + i + j;} |
| 35 | }; |
| 36 | |
| 37 | int A::n_moves = 0; |
| 38 | int A::n_copies = 0; |
| 39 | |
Marshall Clow | f1264e7 | 2014-04-07 13:32:26 +0000 | [diff] [blame] | 40 | int func(int i) { return i; } |
| 41 | |
Howard Hinnant | 54da338 | 2010-08-30 18:46:21 +0000 | [diff] [blame] | 42 | int main() |
| 43 | { |
| 44 | { |
| 45 | std::packaged_task<double(int, char)> p(A(5)); |
Howard Hinnant | 7de4790 | 2010-11-30 20:23:32 +0000 | [diff] [blame] | 46 | assert(p.valid()); |
Howard Hinnant | 54da338 | 2010-08-30 18:46:21 +0000 | [diff] [blame] | 47 | std::future<double> f = p.get_future(); |
| 48 | p(3, 'a'); |
| 49 | assert(f.get() == 105.0); |
| 50 | assert(A::n_copies == 0); |
| 51 | assert(A::n_moves > 0); |
| 52 | } |
Howard Hinnant | 97ecd64 | 2011-05-17 19:12:55 +0000 | [diff] [blame] | 53 | A::n_copies = 0; |
Howard Hinnant | 54da338 | 2010-08-30 18:46:21 +0000 | [diff] [blame] | 54 | A::n_copies = 0; |
| 55 | { |
| 56 | A a(5); |
| 57 | std::packaged_task<double(int, char)> p(a); |
Howard Hinnant | 7de4790 | 2010-11-30 20:23:32 +0000 | [diff] [blame] | 58 | assert(p.valid()); |
Howard Hinnant | 54da338 | 2010-08-30 18:46:21 +0000 | [diff] [blame] | 59 | std::future<double> f = p.get_future(); |
| 60 | p(3, 'a'); |
| 61 | assert(f.get() == 105.0); |
| 62 | assert(A::n_copies > 0); |
| 63 | assert(A::n_moves > 0); |
| 64 | } |
Marshall Clow | f1264e7 | 2014-04-07 13:32:26 +0000 | [diff] [blame] | 65 | { |
| 66 | std::packaged_task<int(int)> p(&func); |
| 67 | assert(p.valid()); |
| 68 | std::future<int> f = p.get_future(); |
| 69 | p(4); |
| 70 | assert(f.get() == 4); |
| 71 | } |
| 72 | { |
| 73 | std::packaged_task<int(int)> p(func); |
| 74 | assert(p.valid()); |
| 75 | std::future<int> f = p.get_future(); |
| 76 | p(4); |
| 77 | assert(f.get() == 4); |
| 78 | } |
Howard Hinnant | 54da338 | 2010-08-30 18:46:21 +0000 | [diff] [blame] | 79 | } |