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// thread -*- C++ -*-
// Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
#include <thread>
#include <system_error>
#include <cerrno>
#if defined(_GLIBCXX_USE_GET_NPROCS)
# include <sys/sysinfo.h>
# define _GLIBCXX_NPROCS get_nprocs()
#elif defined(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP)
# define _GLIBCXX_NPROCS pthread_num_processors_np()
#elif defined(_GLIBCXX_USE_SYSCTL_HW_NCPU)
# include <stddef.h>
# include <sys/sysctl.h>
static inline int get_nprocs()
{
int count;
size_t size = sizeof(count);
int mib[] = { CTL_HW, HW_NCPU };
if (!sysctl(mib, 2, &count, &size, NULL, 0))
return count;
return 0;
}
# define _GLIBCXX_NPROCS get_nprocs()
#elif defined(_GLIBCXX_USE_SC_NPROCESSORS_ONLN)
# include <unistd.h>
# define _GLIBCXX_NPROCS sysconf(_SC_NPROCESSORS_ONLN)
#elif defined(_GLIBCXX_USE_SC_NPROC_ONLN)
# include <unistd.h>
# define _GLIBCXX_NPROCS sysconf(_SC_NPROC_ONLN)
#else
# define _GLIBCXX_NPROCS 0
#endif
#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
namespace std _GLIBCXX_VISIBILITY(default)
{
namespace
{
extern "C" void*
execute_native_thread_routine(void* __p)
{
thread::_Impl_base* __t = static_cast<thread::_Impl_base*>(__p);
thread::__shared_base_type __local;
__local.swap(__t->_M_this_ptr);
__try
{
__t->_M_run();
}
__catch(...)
{
std::terminate();
}
return 0;
}
}
_GLIBCXX_BEGIN_NAMESPACE_VERSION
void
thread::join()
{
int __e = EINVAL;
if (_M_id != id())
__e = __gthread_join(_M_id._M_thread, 0);
if (__e)
__throw_system_error(__e);
_M_id = id();
}
void
thread::detach()
{
int __e = EINVAL;
if (_M_id != id())
__e = __gthread_detach(_M_id._M_thread);
if (__e)
__throw_system_error(__e);
_M_id = id();
}
void
thread::_M_start_thread(__shared_base_type __b)
{
if (!__gthread_active_p())
__throw_system_error(int(errc::operation_not_permitted));
__b->_M_this_ptr = __b;
int __e = __gthread_create(&_M_id._M_thread,
&execute_native_thread_routine, __b.get());
if (__e)
{
__b->_M_this_ptr.reset();
__throw_system_error(__e);
}
}
unsigned int
thread::hardware_concurrency() noexcept
{
int __n = _GLIBCXX_NPROCS;
if (__n < 0)
__n = 0;
return __n;
}
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1
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