Lunchbox  1.4.0
spinLock.h
00001 
00002 /* Copyright (c) 2010-2012, Stefan Eilemann <eile@equalizergraphics.com> 
00003  *
00004  * This library is free software; you can redistribute it and/or modify it under
00005  * the terms of the GNU Lesser General Public License version 2.1 as published
00006  * by the Free Software Foundation.
00007  *  
00008  * This library is distributed in the hope that it will be useful, but WITHOUT
00009  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00010  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
00011  * details.
00012  * 
00013  * You should have received a copy of the GNU Lesser General Public License
00014  * along with this library; if not, write to the Free Software Foundation, Inc.,
00015  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
00016  */
00017 
00018 #ifndef LUNCHBOX_SPINLOCK_H
00019 #define LUNCHBOX_SPINLOCK_H
00020 
00021 #include <lunchbox/atomic.h>         // member
00022 #include <lunchbox/nonCopyable.h>    // base class
00023 #include <lunchbox/thread.h>         // used in inline method
00024 
00025 namespace lunchbox
00026 {
00027 namespace detail { class SpinLock; }
00028 
00038     class SpinLock : public NonCopyable
00039     {
00040     public:
00042         LUNCHBOX_API SpinLock();
00043 
00045         LUNCHBOX_API ~SpinLock();
00046 
00048         LUNCHBOX_API void set();
00049 
00051         LUNCHBOX_API void unset();
00052 
00060         LUNCHBOX_API bool trySet();
00061 
00063         LUNCHBOX_API void setRead();
00064 
00066         LUNCHBOX_API void unsetRead();
00067 
00075         LUNCHBOX_API bool trySetRead();
00076 
00084         LUNCHBOX_API bool isSet();
00085 
00092         LUNCHBOX_API bool isSetWrite();
00093 
00100         LUNCHBOX_API bool isSetRead();
00101 
00102     private:
00103         detail::SpinLock* const _impl;
00104     };
00105 }
00106 #endif //LUNCHBOX_SPINLOCK_H