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c910ceff JW |
1 | // future -*- C++ -*- |
2 | ||
a5544970 | 3 | // Copyright (C) 2009-2019 Free Software Foundation, Inc. |
c910ceff JW |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // Under Section 7 of GPL version 3, you are granted additional | |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
24 | ||
25 | #include <future> | |
b333e8eb | 26 | #include <bits/functexcept.h> |
c910ceff | 27 | |
c910ceff JW |
28 | namespace |
29 | { | |
30 | struct future_error_category : public std::error_category | |
31 | { | |
32 | virtual const char* | |
84b63c01 | 33 | name() const noexcept |
c910ceff JW |
34 | { return "future"; } |
35 | ||
168ad5f5 | 36 | _GLIBCXX_DEFAULT_ABI_TAG |
c910ceff JW |
37 | virtual std::string message(int __ec) const |
38 | { | |
39 | std::string __msg; | |
40 | switch (std::future_errc(__ec)) | |
41 | { | |
42 | case std::future_errc::broken_promise: | |
43 | __msg = "Broken promise"; | |
44 | break; | |
45 | case std::future_errc::future_already_retrieved: | |
46 | __msg = "Future already retrieved"; | |
47 | break; | |
48 | case std::future_errc::promise_already_satisfied: | |
49 | __msg = "Promise already satisfied"; | |
50 | break; | |
a14dd08a JW |
51 | case std::future_errc::no_state: |
52 | __msg = "No associated state"; | |
53 | break; | |
c910ceff JW |
54 | default: |
55 | __msg = "Unknown error"; | |
56 | break; | |
57 | } | |
58 | return __msg; | |
59 | } | |
60 | }; | |
61 | ||
62 | const future_error_category& | |
84b63c01 | 63 | __future_category_instance() noexcept |
c910ceff | 64 | { |
1cbe724c | 65 | static const future_error_category __fec{}; |
c910ceff JW |
66 | return __fec; |
67 | } | |
68 | } | |
69 | ||
12ffa228 BK |
70 | namespace std _GLIBCXX_VISIBILITY(default) |
71 | { | |
72 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
53dc5044 | 73 | |
b333e8eb JW |
74 | void |
75 | __throw_future_error(int __i __attribute__((unused))) | |
76 | { _GLIBCXX_THROW_OR_ABORT(future_error(make_error_code(future_errc(__i)))); } | |
77 | ||
84b63c01 | 78 | const error_category& future_category() noexcept |
94a86be0 | 79 | { return __future_category_instance(); } |
8d1b99e2 | 80 | |
84b63c01 | 81 | future_error::~future_error() noexcept { } |
8d1b99e2 | 82 | |
faa00511 | 83 | const char* |
664e99ea | 84 | future_error::what() const noexcept { return logic_error::what(); } |
53dc5044 | 85 | |
8ba7f29e | 86 | #ifdef _GLIBCXX_HAS_GTHREADS |
e9599233 BK |
87 | __future_base::_Result_base::_Result_base() = default; |
88 | ||
89 | __future_base::_Result_base::~_Result_base() = default; | |
9db7c931 JW |
90 | |
91 | void | |
92 | __future_base::_State_baseV2::_Make_ready::_S_run(void* p) | |
93 | { | |
94 | unique_ptr<_Make_ready> mr{static_cast<_Make_ready*>(p)}; | |
95 | if (auto state = mr->_M_shared_state.lock()) | |
96 | { | |
eae801ba TR |
97 | // Use release MO to synchronize with observers of the ready state. |
98 | state->_M_status._M_store_notify_all(_Status::__ready, | |
99 | memory_order_release); | |
9db7c931 JW |
100 | } |
101 | } | |
102 | ||
103 | // defined in src/c++11/condition_variable.cc | |
104 | extern void | |
105 | __at_thread_exit(__at_thread_exit_elt* elt); | |
106 | ||
107 | void | |
108 | __future_base::_State_baseV2::_Make_ready::_M_set() | |
109 | { | |
110 | _M_cb = &_Make_ready::_S_run; | |
111 | __at_thread_exit(this); | |
112 | } | |
8ba7f29e | 113 | #endif // _GLIBCXX_HAS_GTHREADS |
e9599233 | 114 | |
12ffa228 | 115 | _GLIBCXX_END_NAMESPACE_VERSION |
e9599233 | 116 | } // namespace std |