85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
// Boost.Geometry
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// This file was modified by Oracle on 2018.
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// Modifications copyright (c) 2018, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_SRS_PROJECTIONS_SHARED_GRIDS_HPP
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#define BOOST_GEOMETRY_SRS_PROJECTIONS_SHARED_GRIDS_HPP
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#include <boost/geometry/srs/projections/impl/pj_gridinfo.hpp>
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#include <boost/thread.hpp>
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#include <vector>
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namespace boost { namespace geometry
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{
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namespace projections { namespace detail
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{
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// Forward declaration for functions declarations below
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class shared_grids;
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// Forward declaratios of shared_grids friends
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template <typename StreamPolicy>
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inline bool pj_gridlist_merge_gridfile(std::string const& gridname,
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StreamPolicy const& stream_policy,
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shared_grids & grids,
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std::vector<std::size_t> & gridindexes);
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template <bool Inverse, typename CalcT, typename StreamPolicy, typename Range>
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inline bool pj_apply_gridshift_3(StreamPolicy const& stream_policy,
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Range & range,
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shared_grids & grids,
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std::vector<std::size_t> const& gridindexes);
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class shared_grids
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{
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public:
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std::size_t size() const
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{
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boost::shared_lock<boost::shared_mutex> lock(mutex);
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return gridinfo.size();
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}
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bool empty() const
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{
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boost::shared_lock<boost::shared_mutex> lock(mutex);
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return gridinfo.empty();
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}
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private:
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template <typename StreamPolicy>
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friend inline bool projections::detail::pj_gridlist_merge_gridfile(
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std::string const& gridname,
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StreamPolicy const& stream_policy,
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shared_grids & grids,
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std::vector<std::size_t> & gridindexes);
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template <bool Inverse, typename CalcT, typename StreamPolicy, typename Range>
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friend inline bool projections::detail::pj_apply_gridshift_3(
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StreamPolicy const& stream_policy,
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Range & range,
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shared_grids & grids,
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std::vector<std::size_t> const& gridindexes);
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projections::detail::pj_gridinfo gridinfo;
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mutable boost::shared_mutex mutex;
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};
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}} // namespace projections::detail
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_SRS_PROJECTIONS_SHARED_GRIDS_HPP
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