3 // Copyright (C) 2008, 2009, 2010, 2011 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>
30 #if defined(_GLIBCXX_USE_GET_NPROCS)
31 # include <sys/sysinfo.h>
32 # define _GLIBCXX_NPROCS get_nprocs()
33 #elif defined(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP)
34 # define _GLIBCXX_NPROCS pthread_num_processors_np()
35 #elif defined(_GLIBCXX_USE_SYSCTL_HW_NCPU)
37 # include <sys/sysctl.h>
38 static inline int get_nprocs()
41 size_t size
= sizeof(count
);
42 int mib
[] = { CTL_HW
, HW_NCPU
};
43 if (!sysctl(mib
, 2, &count
, &size
, NULL
, 0))
47 # define _GLIBCXX_NPROCS get_nprocs()
48 #elif defined(_GLIBCXX_USE_SC_NPROCESSORS_ONLN)
50 # define _GLIBCXX_NPROCS sysconf(_SC_NPROCESSORS_ONLN)
51 #elif defined(_GLIBCXX_USE_SC_NPROC_ONLN)
53 # define _GLIBCXX_NPROCS sysconf(_SC_NPROC_ONLN)
55 # define _GLIBCXX_NPROCS 0
58 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
60 namespace std
_GLIBCXX_VISIBILITY(default)
65 execute_native_thread_routine(void* __p
)
67 thread::_Impl_base
* __t
= static_cast<thread::_Impl_base
*>(__p
);
68 thread::__shared_base_type __local
;
69 __local
.swap(__t
->_M_this_ptr
);
84 _GLIBCXX_BEGIN_NAMESPACE_VERSION
92 __e
= __gthread_join(_M_id
._M_thread
, 0);
95 __throw_system_error(__e
);
106 __e
= __gthread_detach(_M_id
._M_thread
);
109 __throw_system_error(__e
);
115 thread::_M_start_thread(__shared_base_type __b
)
117 if (!__gthread_active_p())
118 __throw_system_error(int(errc::operation_not_permitted
));
120 __b
->_M_this_ptr
= __b
;
121 int __e
= __gthread_create(&_M_id
._M_thread
,
122 &execute_native_thread_routine
, __b
.get());
125 __b
->_M_this_ptr
.reset();
126 __throw_system_error(__e
);
131 thread::hardware_concurrency() noexcept
133 int __n
= _GLIBCXX_NPROCS
;
139 _GLIBCXX_END_NAMESPACE_VERSION
142 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1