3 // Copyright (C) 2008-2013 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 __b
->_M_this_ptr
= __b
;
141 int __e
= __gthread_create(&_M_id
._M_thread
,
142 &execute_native_thread_routine
, __b
.get());
145 __b
->_M_this_ptr
.reset();
146 __throw_system_error(__e
);
151 thread::hardware_concurrency() noexcept
153 int __n
= _GLIBCXX_NPROCS
;
159 _GLIBCXX_END_NAMESPACE_VERSION
161 namespace this_thread
163 _GLIBCXX_BEGIN_NAMESPACE_VERSION
166 __sleep_for(chrono::seconds __s
, chrono::nanoseconds __ns
)
168 #ifdef _GLIBCXX_USE_NANOSLEEP
169 __gthread_time_t __ts
=
171 static_cast<std::time_t>(__s
.count()),
172 static_cast<long>(__ns
.count())
174 ::nanosleep(&__ts
, 0);
175 #elif defined(_GLIBCXX_HAVE_SLEEP)
176 # ifdef _GLIBCXX_HAVE_USLEEP
177 ::sleep(__s
.count());
178 if (__ns
.count() > 0)
180 long __us
= __ns
.count() / 1000;
186 ::sleep(__s
.count() + (__ns
>= 1000000));
188 #elif defined(_GLIBCXX_HAVE_WIN32_SLEEP)
189 unsigned long ms
= __ns
.count() / 1000000;
190 if (__ns
.count() > 0 && ms
== 0)
192 ::Sleep(chrono::milliseconds(__s
).count() + ms
);
196 _GLIBCXX_END_NAMESPACE_VERSION
201 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1