1 //===------------------------- thread.cpp----------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
15 #include <sys/types.h>
17 #if !__sun__ && !__linux__
18 #include <sys/sysctl.h>
21 #endif // !__sun__ && !__linux__
24 _LIBCPP_BEGIN_NAMESPACE_STD
35 int ec = pthread_join(__t_, 0);
36 #ifndef _LIBCPP_NO_EXCEPTIONS
38 throw system_error(error_code(ec, system_category()), "thread::join failed");
39 #endif // _LIBCPP_NO_EXCEPTIONS
49 ec = pthread_detach(__t_);
53 #ifndef _LIBCPP_NO_EXCEPTIONS
55 throw system_error(error_code(ec, system_category()), "thread::detach failed");
56 #endif // _LIBCPP_NO_EXCEPTIONS
60 thread::hardware_concurrency() _NOEXCEPT
62 #if defined(CTL_HW) && defined(HW_NCPU)
64 int mib[2] = {CTL_HW, HW_NCPU};
65 std::size_t s = sizeof(n);
66 sysctl(mib, 2, &n, &s, 0, 0);
68 #elif defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L) && defined(_SC_NPROCESSORS_ONLN)
69 long result = sysconf(_SC_NPROCESSORS_ONLN);
70 if (result < 0 || result > UINT_MAX)
73 #else // defined(CTL_HW) && defined(HW_NCPU)
74 // TODO: grovel through /proc or check cpuid on x86 and similar
75 // instructions on other architectures.
76 return 0; // Means not computable [thread.thread.static]
77 #endif // defined(CTL_HW) && defined(HW_NCPU)
84 sleep_for(const chrono::nanoseconds& ns)
86 using namespace chrono;
87 if (ns > nanoseconds::zero())
89 seconds s = duration_cast<seconds>(ns);
91 typedef decltype(ts.tv_sec) ts_sec;
92 _LIBCPP_CONSTEXPR ts_sec ts_sec_max = numeric_limits<ts_sec>::max();
93 if (s.count() < ts_sec_max)
95 ts.tv_sec = static_cast<ts_sec>(s.count());
96 ts.tv_nsec = static_cast<decltype(ts.tv_nsec)>((ns-s).count());
100 ts.tv_sec = ts_sec_max;
101 ts.tv_nsec = giga::num - 1;
109 __thread_specific_ptr<__thread_struct>&
110 __thread_local_data()
112 static __thread_specific_ptr<__thread_struct> __p;
116 // __thread_struct_imp
119 class _LIBCPP_HIDDEN __hidden_allocator
122 typedef T value_type;
124 T* allocate(size_t __n)
125 {return static_cast<T*>(::operator new(__n * sizeof(T)));}
126 void deallocate(T* __p, size_t) {::operator delete((void*)__p);}
128 size_t max_size() const {return size_t(~0) / sizeof(T);}
131 class _LIBCPP_HIDDEN __thread_struct_imp
133 typedef vector<__assoc_sub_state*,
134 __hidden_allocator<__assoc_sub_state*> > _AsyncStates;
135 typedef vector<pair<condition_variable*, mutex*>,
136 __hidden_allocator<pair<condition_variable*, mutex*> > > _Notify;
138 _AsyncStates async_states_;
141 __thread_struct_imp(const __thread_struct_imp&);
142 __thread_struct_imp& operator=(const __thread_struct_imp&);
144 __thread_struct_imp() {}
145 ~__thread_struct_imp();
147 void notify_all_at_thread_exit(condition_variable* cv, mutex* m);
148 void __make_ready_at_thread_exit(__assoc_sub_state* __s);
151 __thread_struct_imp::~__thread_struct_imp()
153 for (_Notify::iterator i = notify_.begin(), e = notify_.end();
157 i->first->notify_all();
159 for (_AsyncStates::iterator i = async_states_.begin(), e = async_states_.end();
162 (*i)->__make_ready();
163 (*i)->__release_shared();
168 __thread_struct_imp::notify_all_at_thread_exit(condition_variable* cv, mutex* m)
170 notify_.push_back(pair<condition_variable*, mutex*>(cv, m));
174 __thread_struct_imp::__make_ready_at_thread_exit(__assoc_sub_state* __s)
176 async_states_.push_back(__s);
182 __thread_struct::__thread_struct()
183 : __p_(new __thread_struct_imp)
187 __thread_struct::~__thread_struct()
193 __thread_struct::notify_all_at_thread_exit(condition_variable* cv, mutex* m)
195 __p_->notify_all_at_thread_exit(cv, m);
199 __thread_struct::__make_ready_at_thread_exit(__assoc_sub_state* __s)
201 __p_->__make_ready_at_thread_exit(__s);
204 _LIBCPP_END_NAMESPACE_STD