libstdc++-v3/src/thread.cc

   1 // thread -*- C++ -*-
   2
   3 // Copyright (C) 2008, 2009 Free Software Foundation, Inc.
   4 //
   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 2, or (at your option)
   9 // any later version.
  10
  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.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 #include <thread>
  31 #include <cerrno>
  32
  33 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
  34
  35 namespace std
  36 {
  37   namespace
  38   {
  39     extern "C" void*
  40     execute_native_thread_routine(void* __p)
  41     {
  42       thread::_Impl_base* __t = static_cast<thread::_Impl_base*>(__p);
  43       thread::__shared_base_type __local;
  44       __local.swap(__t->_M_this_ptr);
  45
  46       __try
  47         {
  48           __t->_M_run();
  49         }
  50       __catch(...)
  51         {
  52           std::terminate();
  53         }
  54
  55       return 0;
  56     }
  57   }
  58
  59   void
  60   thread::join()
  61   {
  62     int __e = EINVAL;
  63
  64     if (_M_id != id())
  65     {
  66       void* __r = 0;
  67       __e = __gthread_join(_M_id._M_thread, &__r);
  68     }
  69
  70     if (__e)
  71       __throw_system_error(__e);
  72
  73     _M_id = id();
  74   }
  75
  76   void
  77   thread::detach()
  78   {
  79     int __e = EINVAL;
  80
  81     if (_M_id != id())
  82       __e = __gthread_detach(_M_id._M_thread);
  83
  84     if (__e)
  85       __throw_system_error(__e);
  86
  87     _M_id = id();
  88   }
  89
  90   void
  91   thread::_M_start_thread(__shared_base_type __b)
  92   {
  93     __b->_M_this_ptr = __b;
  94     int __e = __gthread_create(&_M_id._M_thread,
  95                                &execute_native_thread_routine, __b.get());
  96     if (__e)
  97     {
  98       __b->_M_this_ptr.reset();
  99       __throw_system_error(__e);
 100     }
 101   }
 102 }
 103
 104 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1