libjmmcg  release_579_6_g8cffd
A C++ library containing an eclectic mix of useful, advanced components.
thread_base_impl.hpp
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1 /******************************************************************************
2 ** Copyright © 2004 by J.M.McGuiness, coder@hussar.me.uk
3 **
4 ** This library is free software; you can redistribute it and/or
5 ** modify it under the terms of the GNU Lesser General Public
6 ** License as published by the Free Software Foundation; either
7 ** version 2.1 of the License, or (at your option) any later version.
8 **
9 ** This library is distributed in the hope that it will be useful,
10 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 ** Lesser General Public License for more details.
13 **
14 ** You should have received a copy of the GNU Lesser General Public
15 ** License along with this library; if not, write to the Free Software
16 ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18 
19 namespace jmmcg { namespace ppd { namespace private_ {
20 
21 // Implementation details..... Don't look below here!!! ;)
22 
23 // "thread_base" implementation...
24 
25  template<> inline const typename thread_base<generic_traits::MS_Win32,heavyweight_threading>::thread_traits::api_params_type::suspend_count __fastcall
26  thread_base<generic_traits::MS_Win32, heavyweight_threading>::suspend() noexcept(true) {
27  if (this->state()<thread_traits::api_params_type::no_kernel_thread) {
28  thread_params_lock.lock();
29  // Critical sections don't like double-unlocking....
30  bool locked=true;
31  if (thread_traits::get_current_thread_id()==thread_params.id) {
32  // We want to suspend ourselves - better release the lock, otherwise we'll get deadlocks.
33  thread_params_lock.unlock();
34  locked=false;
35  }
36  const thread_traits::api_params_type::suspend_count sus_ct=thread_traits::suspend(thread_params);
37  if (locked) {
38  thread_params_lock.unlock();
39  }
40  return sus_ct;
41  } else {
42  return 0;
43  }
44  }
45 
46 } } }