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 * Software License Agreement (BSD License)
 * 
 *  Copyright (c) 2011, MBARI.
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/** @file "trex/utils/platform/chrono.hh"
 * @brief chrono class integration helper header
 *
 * This header allows to include either @chrono or its C++11 
 * std::chrono counterpart depending on the initial compilation 
 * options of TREX
 *
 * This allow to either use chrono as implemented in boost 1.47 and 
 * beyond or the one provided by the C++11 standard if the boost 
 * version is older and the compiler supports C++11
 *
 * @ingroup utils 
 * @author Frederic Py <fpy@mbari.org>
 */
#ifndef H_trex_utils_platform_chrono
# define H_trex_utils_platform_chrono

# include "bits/cpp11.hh"

# ifdef DOXYGEN

/** @brief chrono class namespace 
 *
 * This macro defines the namespace where the chrono template class 
 * is defined. This nemespace is either @c boost or @c std depending 
 * on whether c++11 support is active or not
 */
#  define CHRONO_NS platform-dependent

# else // !DOXYGEN
#  ifdef CPP11_HAS_CHRONO
/*
 * Use the standard C++11 chrono header
 */
#   include <chrono>
#   define CHRONO_NS ::std
#  else // !CPP11_HAS_CHRONO
/*
 * Use boost chrono as a replacement
 */
#   include <boost/chrono.hpp>
#   define CHRONO_NS ::boost
#  endif // CPP11_HAS_CHRONO
# endif // DOXYGEN

/** @brief chrono class name
 *
 * The full name of the chrono class with its associated
 * namespace
 */
# define CHRONO CHRONO_NS::chrono

#endif // H_trex_utils_platform_chrono
