Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 1 | //===------------------------- thread.cpp----------------------------------===// |
| 2 | // |
Howard Hinnant | f5256e1 | 2010-05-11 21:36:01 +0000 | [diff] [blame] | 3 | // The LLVM Compiler Infrastructure |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 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 | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "thread" |
| 11 | #include "exception" |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 12 | #include "vector" |
| 13 | #include "future" |
Howard Hinnant | cf115d2 | 2012-08-30 19:14:33 +0000 | [diff] [blame] | 14 | #include "limits" |
Howard Hinnant | 0bfe880 | 2010-05-25 17:25:25 +0000 | [diff] [blame] | 15 | #include <sys/types.h> |
Marshall Clow | a22d2ad | 2013-03-18 17:04:29 +0000 | [diff] [blame] | 16 | #if !defined(_WIN32) |
Howard Hinnant | 7f76450 | 2013-08-14 18:00:20 +0000 | [diff] [blame] | 17 | #if !defined(__sun__) && !defined(__linux__) && !defined(_AIX) |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 18 | #include <sys/sysctl.h> |
Howard Hinnant | 7f76450 | 2013-08-14 18:00:20 +0000 | [diff] [blame] | 19 | #endif // !__sun__ && !__linux__ && !_AIX |
Howard Hinnant | 312926e | 2013-06-30 00:14:43 +0000 | [diff] [blame] | 20 | #include <unistd.h> |
Howard Hinnant | 403f91a | 2012-08-02 18:17:49 +0000 | [diff] [blame] | 21 | #endif // !_WIN32 |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 22 | |
Joerg Sonnenberger | 6744403 | 2013-05-17 21:16:18 +0000 | [diff] [blame] | 23 | #if defined(__NetBSD__) |
| 24 | #pragma weak pthread_create // Do not create libpthread dependency |
| 25 | #endif |
Howard Hinnant | 725ae71 | 2013-07-02 17:53:48 +0000 | [diff] [blame] | 26 | #if defined(_WIN32) |
| 27 | #include <windows.h> |
| 28 | #endif |
Joerg Sonnenberger | 6744403 | 2013-05-17 21:16:18 +0000 | [diff] [blame] | 29 | |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 30 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 31 | |
| 32 | thread::~thread() |
| 33 | { |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 34 | if (__t_ != 0) |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 35 | terminate(); |
| 36 | } |
| 37 | |
| 38 | void |
| 39 | thread::join() |
| 40 | { |
| 41 | int ec = pthread_join(__t_, 0); |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 42 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 43 | if (ec) |
| 44 | throw system_error(error_code(ec, system_category()), "thread::join failed"); |
Howard Hinnant | db4d478 | 2013-03-28 18:56:26 +0000 | [diff] [blame] | 45 | #else |
| 46 | (void)ec; |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 47 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 48 | __t_ = 0; |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 49 | } |
| 50 | |
| 51 | void |
| 52 | thread::detach() |
| 53 | { |
| 54 | int ec = EINVAL; |
| 55 | if (__t_ != 0) |
| 56 | { |
| 57 | ec = pthread_detach(__t_); |
| 58 | if (ec == 0) |
| 59 | __t_ = 0; |
| 60 | } |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 61 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 62 | if (ec) |
| 63 | throw system_error(error_code(ec, system_category()), "thread::detach failed"); |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 64 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | unsigned |
Howard Hinnant | 6e1d851 | 2012-07-21 16:50:47 +0000 | [diff] [blame] | 68 | thread::hardware_concurrency() _NOEXCEPT |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 69 | { |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 70 | #if defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | ec3773c | 2011-12-01 20:21:04 +0000 | [diff] [blame] | 71 | unsigned n; |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 72 | int mib[2] = {CTL_HW, HW_NCPU}; |
| 73 | std::size_t s = sizeof(n); |
| 74 | sysctl(mib, 2, &n, &s, 0, 0); |
| 75 | return n; |
Howard Hinnant | 312926e | 2013-06-30 00:14:43 +0000 | [diff] [blame] | 76 | #elif defined(_SC_NPROCESSORS_ONLN) |
Howard Hinnant | 403f91a | 2012-08-02 18:17:49 +0000 | [diff] [blame] | 77 | long result = sysconf(_SC_NPROCESSORS_ONLN); |
Howard Hinnant | 5f767b7 | 2012-12-27 23:24:31 +0000 | [diff] [blame] | 78 | // sysconf returns -1 if the name is invalid, the option does not exist or |
| 79 | // does not have a definite limit. |
Marshall Clow | b18165e | 2013-02-07 18:48:09 +0000 | [diff] [blame] | 80 | // if sysconf returns some other negative number, we have no idea |
| 81 | // what is going on. Default to something safe. |
| 82 | if (result < 0) |
Howard Hinnant | 5f767b7 | 2012-12-27 23:24:31 +0000 | [diff] [blame] | 83 | return 0; |
Marshall Clow | d854ce6 | 2013-02-07 17:37:58 +0000 | [diff] [blame] | 84 | return static_cast<unsigned>(result); |
Howard Hinnant | 725ae71 | 2013-07-02 17:53:48 +0000 | [diff] [blame] | 85 | #elif defined(_WIN32) |
| 86 | SYSTEM_INFO info; |
| 87 | GetSystemInfo(&info); |
| 88 | return info.dwNumberOfProcessors; |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 89 | #else // defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 90 | // TODO: grovel through /proc or check cpuid on x86 and similar |
| 91 | // instructions on other architectures. |
Howard Hinnant | f755506 | 2013-10-04 21:14:44 +0000 | [diff] [blame] | 92 | # if defined(_MSC_VER) && ! defined(__clang__) |
| 93 | _LIBCPP_WARNING("hardware_concurrency not yet implemented") |
| 94 | # else |
| 95 | # warning hardware_concurrency not yet implemented |
| 96 | # endif |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 97 | return 0; // Means not computable [thread.thread.static] |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 98 | #endif // defined(CTL_HW) && defined(HW_NCPU) |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | namespace this_thread |
| 102 | { |
| 103 | |
| 104 | void |
| 105 | sleep_for(const chrono::nanoseconds& ns) |
| 106 | { |
| 107 | using namespace chrono; |
Howard Hinnant | cf115d2 | 2012-08-30 19:14:33 +0000 | [diff] [blame] | 108 | if (ns > nanoseconds::zero()) |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 109 | { |
Howard Hinnant | cf115d2 | 2012-08-30 19:14:33 +0000 | [diff] [blame] | 110 | seconds s = duration_cast<seconds>(ns); |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 111 | timespec ts; |
Howard Hinnant | cf115d2 | 2012-08-30 19:14:33 +0000 | [diff] [blame] | 112 | typedef decltype(ts.tv_sec) ts_sec; |
| 113 | _LIBCPP_CONSTEXPR ts_sec ts_sec_max = numeric_limits<ts_sec>::max(); |
| 114 | if (s.count() < ts_sec_max) |
| 115 | { |
| 116 | ts.tv_sec = static_cast<ts_sec>(s.count()); |
| 117 | ts.tv_nsec = static_cast<decltype(ts.tv_nsec)>((ns-s).count()); |
| 118 | } |
| 119 | else |
| 120 | { |
| 121 | ts.tv_sec = ts_sec_max; |
| 122 | ts.tv_nsec = giga::num - 1; |
| 123 | } |
David Majnemer | 0707b67 | 2014-06-04 19:43:20 +0000 | [diff] [blame^] | 124 | |
| 125 | while (nanosleep(&ts, &ts) == -1 && errno == EINTR) |
| 126 | ; |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 127 | } |
| 128 | } |
| 129 | |
| 130 | } // this_thread |
| 131 | |
Howard Hinnant | 5306d68 | 2010-10-14 19:18:04 +0000 | [diff] [blame] | 132 | __thread_specific_ptr<__thread_struct>& |
| 133 | __thread_local_data() |
| 134 | { |
| 135 | static __thread_specific_ptr<__thread_struct> __p; |
| 136 | return __p; |
| 137 | } |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 138 | |
| 139 | // __thread_struct_imp |
| 140 | |
Howard Hinnant | 2d72b1e | 2010-12-17 14:46:43 +0000 | [diff] [blame] | 141 | template <class T> |
| 142 | class _LIBCPP_HIDDEN __hidden_allocator |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 143 | { |
Howard Hinnant | 2d72b1e | 2010-12-17 14:46:43 +0000 | [diff] [blame] | 144 | public: |
| 145 | typedef T value_type; |
| 146 | |
| 147 | T* allocate(size_t __n) |
| 148 | {return static_cast<T*>(::operator new(__n * sizeof(T)));} |
Joerg Sonnenberger | 4c6acb5 | 2014-01-04 17:43:00 +0000 | [diff] [blame] | 149 | void deallocate(T* __p, size_t) {::operator delete(static_cast<void*>(__p));} |
Howard Hinnant | 2d72b1e | 2010-12-17 14:46:43 +0000 | [diff] [blame] | 150 | |
| 151 | size_t max_size() const {return size_t(~0) / sizeof(T);} |
| 152 | }; |
| 153 | |
| 154 | class _LIBCPP_HIDDEN __thread_struct_imp |
| 155 | { |
| 156 | typedef vector<__assoc_sub_state*, |
| 157 | __hidden_allocator<__assoc_sub_state*> > _AsyncStates; |
| 158 | typedef vector<pair<condition_variable*, mutex*>, |
| 159 | __hidden_allocator<pair<condition_variable*, mutex*> > > _Notify; |
Howard Hinnant | e6e4d01 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 160 | |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 161 | _AsyncStates async_states_; |
Howard Hinnant | e6e4d01 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 162 | _Notify notify_; |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 163 | |
| 164 | __thread_struct_imp(const __thread_struct_imp&); |
| 165 | __thread_struct_imp& operator=(const __thread_struct_imp&); |
| 166 | public: |
| 167 | __thread_struct_imp() {} |
| 168 | ~__thread_struct_imp(); |
| 169 | |
Howard Hinnant | e6e4d01 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 170 | void notify_all_at_thread_exit(condition_variable* cv, mutex* m); |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 171 | void __make_ready_at_thread_exit(__assoc_sub_state* __s); |
| 172 | }; |
| 173 | |
| 174 | __thread_struct_imp::~__thread_struct_imp() |
| 175 | { |
Howard Hinnant | e6e4d01 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 176 | for (_Notify::iterator i = notify_.begin(), e = notify_.end(); |
| 177 | i != e; ++i) |
| 178 | { |
| 179 | i->second->unlock(); |
| 180 | i->first->notify_all(); |
| 181 | } |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 182 | for (_AsyncStates::iterator i = async_states_.begin(), e = async_states_.end(); |
| 183 | i != e; ++i) |
| 184 | { |
| 185 | (*i)->__make_ready(); |
| 186 | (*i)->__release_shared(); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | void |
Howard Hinnant | e6e4d01 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 191 | __thread_struct_imp::notify_all_at_thread_exit(condition_variable* cv, mutex* m) |
| 192 | { |
| 193 | notify_.push_back(pair<condition_variable*, mutex*>(cv, m)); |
| 194 | } |
| 195 | |
| 196 | void |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 197 | __thread_struct_imp::__make_ready_at_thread_exit(__assoc_sub_state* __s) |
| 198 | { |
| 199 | async_states_.push_back(__s); |
| 200 | __s->__add_shared(); |
| 201 | } |
| 202 | |
| 203 | // __thread_struct |
| 204 | |
| 205 | __thread_struct::__thread_struct() |
| 206 | : __p_(new __thread_struct_imp) |
| 207 | { |
| 208 | } |
| 209 | |
| 210 | __thread_struct::~__thread_struct() |
| 211 | { |
| 212 | delete __p_; |
| 213 | } |
| 214 | |
| 215 | void |
Howard Hinnant | e6e4d01 | 2010-09-03 21:46:37 +0000 | [diff] [blame] | 216 | __thread_struct::notify_all_at_thread_exit(condition_variable* cv, mutex* m) |
| 217 | { |
| 218 | __p_->notify_all_at_thread_exit(cv, m); |
| 219 | } |
| 220 | |
| 221 | void |
Howard Hinnant | 47499b1 | 2010-08-27 20:10:19 +0000 | [diff] [blame] | 222 | __thread_struct::__make_ready_at_thread_exit(__assoc_sub_state* __s) |
| 223 | { |
| 224 | __p_->__make_ready_at_thread_exit(__s); |
| 225 | } |
| 226 | |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 227 | _LIBCPP_END_NAMESPACE_STD |