3 // Copyright (C) 2008, 2009, 2010, 2011, 2012 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_USE_GET_NPROCS)
32 # include <sys/sysinfo.h>
33 # define _GLIBCXX_NPROCS get_nprocs()
34 #elif defined(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP)
35 # define _GLIBCXX_NPROCS pthread_num_processors_np()
36 #elif defined(_GLIBCXX_USE_SYSCTL_HW_NCPU)
38 # include <sys/sysctl.h>
39 static inline int get_nprocs()
42 size_t size = sizeof(count);
43 int mib[] = { CTL_HW, HW_NCPU };
44 if (!sysctl(mib, 2, &count, &size, NULL, 0))
48 # define _GLIBCXX_NPROCS get_nprocs()
49 #elif defined(_GLIBCXX_USE_SC_NPROCESSORS_ONLN)
51 # define _GLIBCXX_NPROCS sysconf(_SC_NPROCESSORS_ONLN)
52 #elif defined(_GLIBCXX_USE_SC_NPROC_ONLN)
54 # define _GLIBCXX_NPROCS sysconf(_SC_NPROC_ONLN)
56 # define _GLIBCXX_NPROCS 0
59 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
61 namespace std _GLIBCXX_VISIBILITY(default)
66 execute_native_thread_routine(void* __p)
68 thread::_Impl_base* __t = static_cast<thread::_Impl_base*>(__p);
69 thread::__shared_base_type __local;
70 __local.swap(__t->_M_this_ptr);
76 __catch(const __cxxabiv1::__forced_unwind&)
78 __throw_exception_again;
89 _GLIBCXX_BEGIN_NAMESPACE_VERSION
97 __e = __gthread_join(_M_id._M_thread, 0);
100 __throw_system_error(__e);
111 __e = __gthread_detach(_M_id._M_thread);
114 __throw_system_error(__e);
120 thread::_M_start_thread(__shared_base_type __b)
122 if (!__gthread_active_p())
123 __throw_system_error(int(errc::operation_not_permitted));
125 __b->_M_this_ptr = __b;
126 int __e = __gthread_create(&_M_id._M_thread,
127 &execute_native_thread_routine, __b.get());
130 __b->_M_this_ptr.reset();
131 __throw_system_error(__e);
136 thread::hardware_concurrency() noexcept
138 int __n = _GLIBCXX_NPROCS;
144 _GLIBCXX_END_NAMESPACE_VERSION
147 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1