3 examples of circular fifo

1. std::atomic default (sequential consistent)

2. std::atomic aquire/release + relaxed memory ordering

3. Broken. Old legacy code pre C++11
that will not work correctly on most platforms

Build instructions
* Unzip 3rdParty/gtest*.zip to 
* On Linux
  mkdir build; cd build
  cmake  cmake -DCMAKE_BUILD_TYPE=Release ..

* On Windows
  mkdir build 
  cd build
  cmake -DCMAKE_BUILD_TYPE=Release -G "Visual Studio 11" ..
  msbuild CIRCULARFIFO.sln \p:Configuration=Release

This should build three binaries-unit tests that utilizes the 
lock-free,wait-free CircularFifos (+ the broken one) that are 
found in src

Kjell Hedstrom (hedstrom at kjellkod dot cc)