3 // Copyright (C) 2008-2015 Free Software Foundation, Inc.
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)
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.
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.
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/>.
27 #include <system_error>
29 #include <cxxabi_forced.h>
31 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
33 #if defined(_GLIBCXX_USE_GET_NPROCS)
34 # include <sys/sysinfo.h>
35 # define _GLIBCXX_NPROCS get_nprocs()
36 #elif defined(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP)
37 # define _GLIBCXX_NPROCS pthread_num_processors_np()
38 #elif defined(_GLIBCXX_USE_SYSCTL_HW_NCPU)
40 # include <sys/sysctl.h>
41 static inline int get_nprocs()
44 size_t size = sizeof(count);
45 int mib[] = { CTL_HW, HW_NCPU };
46 if (!sysctl(mib, 2, &count, &size, NULL, 0))
50 # define _GLIBCXX_NPROCS get_nprocs()
51 #elif defined(_GLIBCXX_USE_SC_NPROCESSORS_ONLN)
53 # define _GLIBCXX_NPROCS sysconf(_SC_NPROCESSORS_ONLN)
54 #elif defined(_GLIBCXX_USE_SC_NPROC_ONLN)
56 # define _GLIBCXX_NPROCS sysconf(_SC_NPROC_ONLN)
58 # define _GLIBCXX_NPROCS 0
61 #ifndef _GLIBCXX_USE_NANOSLEEP
62 # ifdef _GLIBCXX_HAVE_SLEEP
64 # elif defined(_GLIBCXX_HAVE_WIN32_SLEEP)
67 # error "No sleep function known for this target"
71 namespace std _GLIBCXX_VISIBILITY(default)
76 execute_native_thread_routine(void* __p)
78 thread::_Impl_base* __t = static_cast<thread::_Impl_base*>(__p);
79 thread::__shared_base_type __local;
80 __local.swap(__t->_M_this_ptr);
86 __catch(const __cxxabiv1::__forced_unwind&)
88 __throw_exception_again;
99 _GLIBCXX_BEGIN_NAMESPACE_VERSION
107 __e = __gthread_join(_M_id._M_thread, 0);
110 __throw_system_error(__e);
121 __e = __gthread_detach(_M_id._M_thread);
124 __throw_system_error(__e);
130 thread::_M_start_thread(__shared_base_type __b)
132 if (!__gthread_active_p())
134 throw system_error(make_error_code(errc::operation_not_permitted),
135 "Enable multithreading to use std::thread");
137 __throw_system_error(int(errc::operation_not_permitted));
140 _M_start_thread(std::move(__b), nullptr);
144 thread::_M_start_thread(__shared_base_type __b, void (*)())
146 auto ptr = __b.get();
147 ptr->_M_this_ptr = std::move(__b);
148 int __e = __gthread_create(&_M_id._M_thread,
149 &execute_native_thread_routine, ptr);
152 ptr->_M_this_ptr.reset();
153 __throw_system_error(__e);
158 thread::hardware_concurrency() noexcept
160 int __n = _GLIBCXX_NPROCS;
166 _GLIBCXX_END_NAMESPACE_VERSION
168 namespace this_thread
170 _GLIBCXX_BEGIN_NAMESPACE_VERSION
173 __sleep_for(chrono::seconds __s, chrono::nanoseconds __ns)
175 #ifdef _GLIBCXX_USE_NANOSLEEP
176 __gthread_time_t __ts =
178 static_cast<std::time_t>(__s.count()),
179 static_cast<long>(__ns.count())
181 ::nanosleep(&__ts, 0);
182 #elif defined(_GLIBCXX_HAVE_SLEEP)
183 # ifdef _GLIBCXX_HAVE_USLEEP
184 ::sleep(__s.count());
185 if (__ns.count() > 0)
187 long __us = __ns.count() / 1000;
193 ::sleep(__s.count() + (__ns.count() >= 1000000));
195 #elif defined(_GLIBCXX_HAVE_WIN32_SLEEP)
196 unsigned long ms = __ns.count() / 1000000;
197 if (__ns.count() > 0 && ms == 0)
199 ::Sleep(chrono::milliseconds(__s).count() + ms);
203 _GLIBCXX_END_NAMESPACE_VERSION
208 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1