file_handle.hpp

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#ifndef SILICIUM_FILE_HANDLE_HPP
#define SILICIUM_FILE_HANDLE_HPP

#include <silicium/native_file_descriptor.hpp>
#include <silicium/exchange.hpp>
#include <silicium/is_handle.hpp>

namespace Si
{
    struct file_handle
    {
        native_file_descriptor handle;

        file_handle() BOOST_NOEXCEPT
            : handle(no_file_handle)
        {
        }

        file_handle(file_handle &&other) BOOST_NOEXCEPT
            : handle(no_file_handle)
        {
            swap(other);
        }

        explicit file_handle(native_file_descriptor handle) BOOST_NOEXCEPT
            : handle(handle)
        {
        }

        file_handle &operator = (file_handle &&other) BOOST_NOEXCEPT
        {
            swap(other);
            return *this;
        }

        void swap(file_handle &other) BOOST_NOEXCEPT
        {
            using std::swap;
            swap(handle, other.handle);
        }

        void close() BOOST_NOEXCEPT
        {
            file_handle().swap(*this);
        }

        native_file_descriptor release() BOOST_NOEXCEPT
        {
            return Si::exchange(handle, no_file_handle);
        }

        ~file_handle() BOOST_NOEXCEPT
        {
            if (handle != no_file_handle)
            {
                terminating_close(handle);
            }
        }

    private:

        SILICIUM_DELETED_FUNCTION(file_handle(file_handle const &))
        SILICIUM_DELETED_FUNCTION(file_handle &operator = (file_handle const &))
    };

    BOOST_STATIC_ASSERT(is_handle<file_handle>::value);
}

#endif