Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 1 | //===------------------------- thread.cpp----------------------------------===// |
| 2 | // |
Howard Hinnant | c566dc3 | 2010-05-11 21:36:01 +0000 | [diff] [blame] | 3 | // The LLVM Compiler Infrastructure |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 4 | // |
Howard Hinnant | ee11c31 | 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 | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
Jonathan Roelofs | 39cb6bf | 2014-09-05 19:45:05 +0000 | [diff] [blame] | 10 | #include "__config" |
| 11 | #ifndef _LIBCPP_HAS_NO_THREADS |
| 12 | |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 13 | #include "thread" |
| 14 | #include "exception" |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 15 | #include "vector" |
| 16 | #include "future" |
Howard Hinnant | 9ce8dc5 | 2012-08-30 19:14:33 +0000 | [diff] [blame] | 17 | #include "limits" |
Howard Hinnant | d031c58 | 2010-05-25 17:25:25 +0000 | [diff] [blame] | 18 | #include <sys/types.h> |
Ben Craig | 664df1f | 2016-01-29 13:53:23 +0000 | [diff] [blame] | 19 | |
| 20 | #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) |
| 21 | # include <sys/param.h> |
| 22 | # if defined(BSD) |
JF Bastien | 57daf9b | 2014-12-02 17:30:19 +0000 | [diff] [blame] | 23 | # include <sys/sysctl.h> |
Ben Craig | 664df1f | 2016-01-29 13:53:23 +0000 | [diff] [blame] | 24 | # endif // defined(BSD) |
| 25 | #endif // defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) |
| 26 | |
Ed Schouten | f3034f7 | 2017-02-11 08:30:18 +0000 | [diff] [blame] | 27 | #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__CloudABI__) |
JF Bastien | 57daf9b | 2014-12-02 17:30:19 +0000 | [diff] [blame] | 28 | # include <unistd.h> |
Ed Schouten | f3034f7 | 2017-02-11 08:30:18 +0000 | [diff] [blame] | 29 | #endif // defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__CloudABI__) |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 30 | |
Joerg Sonnenberger | 2293954 | 2013-05-17 21:16:18 +0000 | [diff] [blame] | 31 | #if defined(__NetBSD__) |
| 32 | #pragma weak pthread_create // Do not create libpthread dependency |
| 33 | #endif |
Saleem Abdulrasool | ee302e4 | 2017-01-03 21:53:51 +0000 | [diff] [blame] | 34 | |
| 35 | #if defined(_LIBCPP_WIN32API) |
Howard Hinnant | 287fc50 | 2013-07-02 17:53:48 +0000 | [diff] [blame] | 36 | #include <windows.h> |
Saleem Abdulrasool | ee302e4 | 2017-01-03 21:53:51 +0000 | [diff] [blame] | 37 | #endif // defined(_LIBCPP_WIN32API) |
Joerg Sonnenberger | 2293954 | 2013-05-17 21:16:18 +0000 | [diff] [blame] | 38 | |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 39 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 40 | |
| 41 | thread::~thread() |
| 42 | { |
Asiri Rathnayake | db97e25 | 2017-01-16 13:13:01 +0000 | [diff] [blame] | 43 | if (!__libcpp_thread_isnull(&__t_)) |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 44 | terminate(); |
| 45 | } |
| 46 | |
| 47 | void |
| 48 | thread::join() |
| 49 | { |
Asiri Rathnayake | 9f71bc5 | 2016-06-03 08:45:26 +0000 | [diff] [blame] | 50 | int ec = EINVAL; |
Asiri Rathnayake | db97e25 | 2017-01-16 13:13:01 +0000 | [diff] [blame] | 51 | if (!__libcpp_thread_isnull(&__t_)) |
Asiri Rathnayake | 9f71bc5 | 2016-06-03 08:45:26 +0000 | [diff] [blame] | 52 | { |
| 53 | ec = __libcpp_thread_join(&__t_); |
| 54 | if (ec == 0) |
Asiri Rathnayake | db97e25 | 2017-01-16 13:13:01 +0000 | [diff] [blame] | 55 | __t_ = _LIBCPP_NULL_THREAD; |
Asiri Rathnayake | 9f71bc5 | 2016-06-03 08:45:26 +0000 | [diff] [blame] | 56 | } |
Marshall Clow | 8fea161 | 2016-08-25 15:09:01 +0000 | [diff] [blame] | 57 | |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 58 | if (ec) |
Marshall Clow | 8fea161 | 2016-08-25 15:09:01 +0000 | [diff] [blame] | 59 | __throw_system_error(ec, "thread::join failed"); |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | void |
| 63 | thread::detach() |
| 64 | { |
| 65 | int ec = EINVAL; |
Asiri Rathnayake | db97e25 | 2017-01-16 13:13:01 +0000 | [diff] [blame] | 66 | if (!__libcpp_thread_isnull(&__t_)) |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 67 | { |
Asiri Rathnayake | fa2e203 | 2016-05-06 14:06:29 +0000 | [diff] [blame] | 68 | ec = __libcpp_thread_detach(&__t_); |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 69 | if (ec == 0) |
Asiri Rathnayake | db97e25 | 2017-01-16 13:13:01 +0000 | [diff] [blame] | 70 | __t_ = _LIBCPP_NULL_THREAD; |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 71 | } |
Marshall Clow | 8fea161 | 2016-08-25 15:09:01 +0000 | [diff] [blame] | 72 | |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 73 | if (ec) |
Marshall Clow | 8fea161 | 2016-08-25 15:09:01 +0000 | [diff] [blame] | 74 | __throw_system_error(ec, "thread::detach failed"); |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | unsigned |
Howard Hinnant | 4bd3470 | 2012-07-21 16:50:47 +0000 | [diff] [blame] | 78 | thread::hardware_concurrency() _NOEXCEPT |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 79 | { |
Howard Hinnant | 155c2af | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 80 | #if defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | 28b2488 | 2011-12-01 20:21:04 +0000 | [diff] [blame] | 81 | unsigned n; |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 82 | int mib[2] = {CTL_HW, HW_NCPU}; |
| 83 | std::size_t s = sizeof(n); |
| 84 | sysctl(mib, 2, &n, &s, 0, 0); |
| 85 | return n; |
Howard Hinnant | 4a55d84 | 2013-06-30 00:14:43 +0000 | [diff] [blame] | 86 | #elif defined(_SC_NPROCESSORS_ONLN) |
Howard Hinnant | 55c3c5f | 2012-08-02 18:17:49 +0000 | [diff] [blame] | 87 | long result = sysconf(_SC_NPROCESSORS_ONLN); |
Howard Hinnant | 3f64833 | 2012-12-27 23:24:31 +0000 | [diff] [blame] | 88 | // sysconf returns -1 if the name is invalid, the option does not exist or |
| 89 | // does not have a definite limit. |
Marshall Clow | dcfde7a | 2013-02-07 18:48:09 +0000 | [diff] [blame] | 90 | // if sysconf returns some other negative number, we have no idea |
| 91 | // what is going on. Default to something safe. |
| 92 | if (result < 0) |
Howard Hinnant | 3f64833 | 2012-12-27 23:24:31 +0000 | [diff] [blame] | 93 | return 0; |
Marshall Clow | 84d47b9 | 2013-02-07 17:37:58 +0000 | [diff] [blame] | 94 | return static_cast<unsigned>(result); |
Saleem Abdulrasool | ee302e4 | 2017-01-03 21:53:51 +0000 | [diff] [blame] | 95 | #elif defined(_LIBCPP_WIN32API) |
Howard Hinnant | 287fc50 | 2013-07-02 17:53:48 +0000 | [diff] [blame] | 96 | SYSTEM_INFO info; |
| 97 | GetSystemInfo(&info); |
| 98 | return info.dwNumberOfProcessors; |
Howard Hinnant | ffb308e | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 99 | #else // defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | 155c2af | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 100 | // TODO: grovel through /proc or check cpuid on x86 and similar |
| 101 | // instructions on other architectures. |
Saleem Abdulrasool | d94ab1c | 2017-02-06 05:26:49 +0000 | [diff] [blame] | 102 | # if defined(_LIBCPP_MSVC) |
Howard Hinnant | 408927e | 2013-10-04 21:14:44 +0000 | [diff] [blame] | 103 | _LIBCPP_WARNING("hardware_concurrency not yet implemented") |
| 104 | # else |
| 105 | # warning hardware_concurrency not yet implemented |
| 106 | # endif |
Howard Hinnant | 155c2af | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 107 | return 0; // Means not computable [thread.thread.static] |
Howard Hinnant | ffb308e | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 108 | #endif // defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | namespace this_thread |
| 112 | { |
| 113 | |
| 114 | void |
| 115 | sleep_for(const chrono::nanoseconds& ns) |
| 116 | { |
Asiri Rathnayake | 5b8bf4f | 2017-02-09 09:31:41 +0000 | [diff] [blame] | 117 | if (ns > chrono::nanoseconds::zero()) |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 118 | { |
Asiri Rathnayake | 5b8bf4f | 2017-02-09 09:31:41 +0000 | [diff] [blame] | 119 | __libcpp_thread_sleep_for(ns); |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 120 | } |
| 121 | } |
| 122 | |
| 123 | } // this_thread |
| 124 | |
Howard Hinnant | 15d5505 | 2010-10-14 19:18:04 +0000 | [diff] [blame] | 125 | __thread_specific_ptr<__thread_struct>& |
| 126 | __thread_local_data() |
| 127 | { |
| 128 | static __thread_specific_ptr<__thread_struct> __p; |
| 129 | return __p; |
| 130 | } |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 131 | |
| 132 | // __thread_struct_imp |
| 133 | |
Howard Hinnant | cf82332 | 2010-12-17 14:46:43 +0000 | [diff] [blame] | 134 | template <class T> |
| 135 | class _LIBCPP_HIDDEN __hidden_allocator |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 136 | { |
Howard Hinnant | cf82332 | 2010-12-17 14:46:43 +0000 | [diff] [blame] | 137 | public: |
| 138 | typedef T value_type; |
| 139 | |
| 140 | T* allocate(size_t __n) |
| 141 | {return static_cast<T*>(::operator new(__n * sizeof(T)));} |
Joerg Sonnenberger | c7655a2 | 2014-01-04 17:43:00 +0000 | [diff] [blame] | 142 | void deallocate(T* __p, size_t) {::operator delete(static_cast<void*>(__p));} |
Howard Hinnant | cf82332 | 2010-12-17 14:46:43 +0000 | [diff] [blame] | 143 | |
| 144 | size_t max_size() const {return size_t(~0) / sizeof(T);} |
| 145 | }; |
| 146 | |
| 147 | class _LIBCPP_HIDDEN __thread_struct_imp |
| 148 | { |
| 149 | typedef vector<__assoc_sub_state*, |
| 150 | __hidden_allocator<__assoc_sub_state*> > _AsyncStates; |
| 151 | typedef vector<pair<condition_variable*, mutex*>, |
| 152 | __hidden_allocator<pair<condition_variable*, mutex*> > > _Notify; |
Howard Hinnant | e6a1085 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 153 | |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 154 | _AsyncStates async_states_; |
Howard Hinnant | e6a1085 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 155 | _Notify notify_; |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 156 | |
| 157 | __thread_struct_imp(const __thread_struct_imp&); |
| 158 | __thread_struct_imp& operator=(const __thread_struct_imp&); |
| 159 | public: |
| 160 | __thread_struct_imp() {} |
| 161 | ~__thread_struct_imp(); |
| 162 | |
Howard Hinnant | e6a1085 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 163 | void notify_all_at_thread_exit(condition_variable* cv, mutex* m); |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 164 | void __make_ready_at_thread_exit(__assoc_sub_state* __s); |
| 165 | }; |
| 166 | |
| 167 | __thread_struct_imp::~__thread_struct_imp() |
| 168 | { |
Howard Hinnant | e6a1085 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 169 | for (_Notify::iterator i = notify_.begin(), e = notify_.end(); |
| 170 | i != e; ++i) |
| 171 | { |
| 172 | i->second->unlock(); |
| 173 | i->first->notify_all(); |
| 174 | } |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 175 | for (_AsyncStates::iterator i = async_states_.begin(), e = async_states_.end(); |
| 176 | i != e; ++i) |
| 177 | { |
| 178 | (*i)->__make_ready(); |
| 179 | (*i)->__release_shared(); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | void |
Howard Hinnant | e6a1085 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 184 | __thread_struct_imp::notify_all_at_thread_exit(condition_variable* cv, mutex* m) |
| 185 | { |
| 186 | notify_.push_back(pair<condition_variable*, mutex*>(cv, m)); |
| 187 | } |
| 188 | |
| 189 | void |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 190 | __thread_struct_imp::__make_ready_at_thread_exit(__assoc_sub_state* __s) |
| 191 | { |
| 192 | async_states_.push_back(__s); |
| 193 | __s->__add_shared(); |
| 194 | } |
| 195 | |
| 196 | // __thread_struct |
| 197 | |
| 198 | __thread_struct::__thread_struct() |
| 199 | : __p_(new __thread_struct_imp) |
| 200 | { |
| 201 | } |
| 202 | |
| 203 | __thread_struct::~__thread_struct() |
| 204 | { |
| 205 | delete __p_; |
| 206 | } |
| 207 | |
| 208 | void |
Howard Hinnant | e6a1085 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 209 | __thread_struct::notify_all_at_thread_exit(condition_variable* cv, mutex* m) |
| 210 | { |
| 211 | __p_->notify_all_at_thread_exit(cv, m); |
| 212 | } |
| 213 | |
| 214 | void |
Howard Hinnant | 3820f6b | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 215 | __thread_struct::__make_ready_at_thread_exit(__assoc_sub_state* __s) |
| 216 | { |
| 217 | __p_->__make_ready_at_thread_exit(__s); |
| 218 | } |
| 219 | |
Howard Hinnant | c51e102 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 220 | _LIBCPP_END_NAMESPACE_STD |
Jonathan Roelofs | 39cb6bf | 2014-09-05 19:45:05 +0000 | [diff] [blame] | 221 | |
| 222 | #endif // !_LIBCPP_HAS_NO_THREADS |