1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/iostreams/detail/closer.hpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,122 @@
     1.4 +// (C) Copyright Jonathan Turkanis 2003.
     1.5 +// Distributed under the Boost Software License, Version 1.0. (See accompanying
     1.6 +// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
     1.7 +
     1.8 +// See http://www.boost.org/libs/iostreams for documentation.
     1.9 +
    1.10 +#ifndef BOOST_IOSTREAMS_DETAIL_CLOSER_HPP_INCLUDED
    1.11 +#define BOOST_IOSTREAMS_DETAIL_CLOSER_HPP_INCLUDED
    1.12 +
    1.13 +#if defined(_MSC_VER) && (_MSC_VER >= 1020)
    1.14 +# pragma once
    1.15 +#endif
    1.16 +
    1.17 +#include <exception>                       // exception.
    1.18 +#include <boost/iostreams/detail/ios.hpp>  // openmode.
    1.19 +#include <boost/iostreams/operations.hpp>  // close
    1.20 +#include <boost/iostreams/traits.hpp>      // is_device.
    1.21 +#include <boost/mpl/if.hpp>
    1.22 +
    1.23 +namespace boost { namespace iostreams { namespace detail {
    1.24 +
    1.25 +template<typename T>
    1.26 +struct closer {
    1.27 +    closer(T& t) : t_(&t) { }
    1.28 +    ~closer() { try { t_->close(); } catch (std::exception&) { } }
    1.29 +    T* t_;
    1.30 +};
    1.31 +
    1.32 +template<typename Device>
    1.33 +struct external_device_closer {
    1.34 +    external_device_closer(Device& dev, BOOST_IOS::openmode which)
    1.35 +        : device_(&dev), which_(which),
    1.36 +          dummy_(true), nothrow_(dummy_)
    1.37 +        { }
    1.38 +    external_device_closer(Device& dev, BOOST_IOS::openmode which, bool& nothrow)
    1.39 +        : device_(&dev), which_(which), 
    1.40 +          dummy_(true), nothrow_(nothrow)
    1.41 +        { }
    1.42 +    ~external_device_closer() 
    1.43 +    { 
    1.44 +        try { 
    1.45 +            boost::iostreams::close(*device_, which_); 
    1.46 +        } catch (...) {
    1.47 +            if (!nothrow_) {
    1.48 +                nothrow_ = true;
    1.49 +                throw;
    1.50 +            }
    1.51 +        } 
    1.52 +    }
    1.53 +    Device*               device_;
    1.54 +    BOOST_IOS::openmode   which_;
    1.55 +    bool                  dummy_;
    1.56 +    bool&                 nothrow_;
    1.57 +};
    1.58 +
    1.59 +template<typename Filter, typename Device>
    1.60 +struct external_filter_closer {
    1.61 +    external_filter_closer(Filter& flt, Device& dev, BOOST_IOS::openmode which)
    1.62 +        : filter_(flt), device_(dev), which_(which), 
    1.63 +          dummy_(true), nothrow_(dummy_) 
    1.64 +        { }
    1.65 +    external_filter_closer( Filter& flt, Device& dev, 
    1.66 +                            BOOST_IOS::openmode which, bool& nothrow )
    1.67 +        : filter_(flt), device_(dev), which_(which), 
    1.68 +          dummy_(true), nothrow_(nothrow) 
    1.69 +        { }
    1.70 +    ~external_filter_closer() 
    1.71 +    { 
    1.72 +        try { 
    1.73 +            boost::iostreams::close(filter_, device_, which_); 
    1.74 +        } catch (...) { 
    1.75 +            if (!nothrow_) {
    1.76 +                nothrow_ = true;
    1.77 +                throw;
    1.78 +            }
    1.79 +        } 
    1.80 +    }
    1.81 +    Filter&               filter_;
    1.82 +    Device&               device_;
    1.83 +    BOOST_IOS::openmode   which_;
    1.84 +    bool                  dummy_;
    1.85 +    bool&                 nothrow_;
    1.86 +};
    1.87 +
    1.88 +template<typename FilterOrDevice, typename DeviceOrDummy = int>
    1.89 +struct external_closer_traits {
    1.90 +    typedef typename 
    1.91 +            mpl::if_<
    1.92 +                is_device<FilterOrDevice>,
    1.93 +                external_device_closer<FilterOrDevice>,
    1.94 +                external_filter_closer<FilterOrDevice, DeviceOrDummy>
    1.95 +            >::type type;
    1.96 +};
    1.97 +
    1.98 +template<typename FilterOrDevice, typename DeviceOrDummy = int>
    1.99 +struct external_closer 
   1.100 +    : external_closer_traits<FilterOrDevice, DeviceOrDummy>::type
   1.101 +{ 
   1.102 +    typedef typename 
   1.103 +            external_closer_traits<
   1.104 +                FilterOrDevice, DeviceOrDummy
   1.105 +            >::type base_type;
   1.106 +    external_closer(FilterOrDevice& dev, BOOST_IOS::openmode which)
   1.107 +        : base_type(dev, which)
   1.108 +    { BOOST_STATIC_ASSERT(is_device<FilterOrDevice>::value); };
   1.109 +    external_closer( FilterOrDevice& dev, BOOST_IOS::openmode which,
   1.110 +                     bool& nothrow )
   1.111 +        : base_type(dev, which, nothrow)
   1.112 +    { BOOST_STATIC_ASSERT(is_device<FilterOrDevice>::value); };
   1.113 +    external_closer( FilterOrDevice& flt, DeviceOrDummy& dev,
   1.114 +                     BOOST_IOS::openmode which )
   1.115 +        : base_type(flt, dev, which)
   1.116 +    { BOOST_STATIC_ASSERT(is_filter<FilterOrDevice>::value); };
   1.117 +    external_closer( FilterOrDevice& flt, DeviceOrDummy& dev,
   1.118 +                     BOOST_IOS::openmode which, bool& nothrow )
   1.119 +        : base_type(flt, dev, which, nothrow)
   1.120 +    { BOOST_STATIC_ASSERT(is_filter<FilterOrDevice>::value); };
   1.121 +};
   1.122 +
   1.123 +} } } // End namespaces detail, iostreams, boost.
   1.124 +
   1.125 +#endif // #ifndef BOOST_IOSTREAMS_DETAIL_CLOSER_HPP_INCLUDED