GroovX: src/rutz/spin_lock_pthreads.h Source File

00001 
00003 
00004 //
00005 // Copyright (c) 2007-2007 University of Southern California
00006 // Rob Peters <rjpeters at usc dot edu>
00007 //
00008 // created: Wed Sep  5 12:08:48 2007
00009 // commit: $Id: spin_lock_pthreads.h 10134 2008-03-04 17:58:05Z rjpeters $
00010 // $HeadURL: file:///lab/rjpeters/svnrepo/code/trunk/groovx/src/rutz/spin_lock_pthreads.h $
00011 //
00012 // --------------------------------------------------------------------
00013 //
00014 // This file is part of GroovX.
00015 //   [http://www.klab.caltech.edu/rjpeters/groovx/]
00016 //
00017 // GroovX is free software; you can redistribute it and/or modify it
00018 // under the terms of the GNU General Public License as published by
00019 // the Free Software Foundation; either version 2 of the License, or
00020 // (at your option) any later version.
00021 //
00022 // GroovX is distributed in the hope that it will be useful, but
00023 // WITHOUT ANY WARRANTY; without even the implied warranty of
00024 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00025 // General Public License for more details.
00026 //
00027 // You should have received a copy of the GNU General Public License
00028 // along with GroovX; if not, write to the Free Software Foundation,
00029 // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
00030 //
00032 
00033 #ifndef GROOVX_RUTZ_SPIN_LOCK_PTHREADS_H_UTC20070905190848_DEFINED
00034 #define GROOVX_RUTZ_SPIN_LOCK_PTHREADS_H_UTC20070905190848_DEFINED
00035 
00036 #include "rutz/error.h"
00037 
00038 namespace rutz
00039 {
00040 
00041 class spin_lock_pthreads
00042 {
00043 private:
00044   pthread_spinlock_t m_lock;
00045 
00046   spin_lock_pthreads(const spin_lock_pthreads&); // not implemented
00047   spin_lock_pthreads& operator=(const spin_lock_pthreads&); // not implemented
00048 
00049 public:
00051   spin_lock_pthreads();
00052 
00053   ~spin_lock_pthreads();
00054 
00055   void lock()
00056   {
00057     if (0 != pthread_spin_lock(&m_lock))
00058       throw rutz::error("pthread_spin_lock() failed", SRC_POS);
00059   }
00060 
00061   bool try_lock()
00062   { return (0 == pthread_spin_trylock(&m_lock)); }
00063 
00064   void unlock()
00065   { pthread_spin_unlock(&m_lock); }
00066 };
00067 
00068 }
00069 
00070 static const char vcid_groovx_rutz_spin_lock_pthreads_h_utc20070905190848[] = "$Id: spin_lock_pthreads.h 10134 2008-03-04 17:58:05Z rjpeters $ $HeadURL: file:///lab/rjpeters/svnrepo/code/trunk/groovx/src/rutz/spin_lock_pthreads.h $";
00071 #endif // !GROOVX_RUTZ_SPIN_LOCK_PTHREADS_H_UTC20070905190848DEFINED