Added boost header

test/external/boost/iostreams/device/mapped_file.hpp

@@ -0,0 +1,599 @@
+// (C) Copyright Jorge Lodos 2008.
+// (C) Copyright Jonathan Turkanis 2003.
+// (C) Copyright Craig Henderson 2002.   'boost/memmap.hpp' from sandbox
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
+
+#ifndef BOOST_IOSTREAMS_MAPPED_FILE_HPP_INCLUDED
+#define BOOST_IOSTREAMS_MAPPED_FILE_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <boost/config.hpp>                   // make sure size_t is in std.
+#include <cstddef>                            // size_t.
+#include <string>                             // pathnames.
+#include <utility>                            // pair.
+#include <boost/config.hpp>                   // BOOST_MSVC.
+#include <boost/detail/workaround.hpp>
+#include <boost/iostreams/close.hpp>
+#include <boost/iostreams/concepts.hpp>
+#include <boost/iostreams/detail/config/auto_link.hpp>
+#include <boost/iostreams/detail/config/dyn_link.hpp>
+#include <boost/iostreams/detail/config/wide_streams.hpp>
+#include <boost/iostreams/detail/ios.hpp>     // openmode, failure
+#include <boost/iostreams/detail/path.hpp>
+#include <boost/iostreams/operations_fwd.hpp>
+#include <boost/iostreams/positioning.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/static_assert.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+// Must come last.
+#include <boost/config/abi_prefix.hpp>
+
+namespace boost { namespace iostreams {
+
+//------------------Definition of mapped_file_base and mapped_file_params-----//
+
+// Forward declarations
+class mapped_file_source;
+class mapped_file_sink;
+class mapped_file;
+namespace detail { class mapped_file_impl; }
+
+class mapped_file_base {
+public:
+    enum mapmode {
+        readonly = 1,
+        readwrite = 2,
+        priv = 4
+    };
+};
+
+// Bitmask operations for mapped_file_base::mapmode
+mapped_file_base::mapmode 
+operator|(mapped_file_base::mapmode a, mapped_file_base::mapmode b);
+
+mapped_file_base::mapmode 
+operator&(mapped_file_base::mapmode a, mapped_file_base::mapmode b);
+
+mapped_file_base::mapmode 
+operator^(mapped_file_base::mapmode a, mapped_file_base::mapmode b);
+
+mapped_file_base::mapmode 
+operator~(mapped_file_base::mapmode a);
+
+mapped_file_base::mapmode 
+operator|=(mapped_file_base::mapmode& a, mapped_file_base::mapmode b);
+
+mapped_file_base::mapmode 
+operator&=(mapped_file_base::mapmode& a, mapped_file_base::mapmode b);
+
+mapped_file_base::mapmode 
+operator^=(mapped_file_base::mapmode& a, mapped_file_base::mapmode b);
+
+//------------------Definition of mapped_file_params--------------------------//
+
+namespace detail {
+
+struct mapped_file_params_base {
+    mapped_file_params_base()
+        : flags(static_cast<mapped_file_base::mapmode>(0)), 
+          mode(), offset(0), length(static_cast<std::size_t>(-1)), 
+          new_file_size(0), hint(0)
+        { }
+private:
+    friend class mapped_file_impl;
+    void normalize();
+public:
+    mapped_file_base::mapmode   flags;
+    BOOST_IOS::openmode         mode;  // Deprecated
+    stream_offset               offset;
+    std::size_t                 length;
+    stream_offset               new_file_size;
+    const char*                 hint;
+};
+
+} // End namespace detail.
+
+// This template allows Boost.Filesystem paths to be specified when creating or
+// reopening a memory mapped file, without creating a dependence on
+// Boost.Filesystem. Possible values of Path include std::string,
+// boost::filesystem::path, boost::filesystem::wpath, 
+// and boost::iostreams::detail::path (used to store either a std::string or a
+// std::wstring).
+template<typename Path>
+struct basic_mapped_file_params 
+    : detail::mapped_file_params_base 
+{
+    typedef detail::mapped_file_params_base base_type;
+
+    // For wide paths, instantiate basic_mapped_file_params 
+    // with boost::filesystem::wpath
+#ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS
+    BOOST_STATIC_ASSERT((!is_same<Path, std::wstring>::value));
+#endif
+
+    // Default constructor
+    basic_mapped_file_params() { }
+
+    // Construction from a Path
+    explicit basic_mapped_file_params(const Path& p) : path(p) { }
+
+    // Construction from a path of a different type
+    template<typename PathT>
+    explicit basic_mapped_file_params(const PathT& p) : path(p) { }
+
+    // Copy constructor
+    basic_mapped_file_params(const basic_mapped_file_params& other)
+        : base_type(other), path(other.path)
+        { }
+
+    // Templated copy constructor
+    template<typename PathT>
+    basic_mapped_file_params(const basic_mapped_file_params<PathT>& other)
+        : base_type(other), path(other.path)
+        { }
+
+    typedef Path  path_type;
+    Path          path;
+};
+
+typedef basic_mapped_file_params<std::string> mapped_file_params;
+
+//------------------Definition of mapped_file_source--------------------------//
+
+class BOOST_IOSTREAMS_DECL mapped_file_source : public mapped_file_base {
+private:
+    struct safe_bool_helper { int x; };
+    typedef int safe_bool_helper::*                 safe_bool;
+    typedef detail::mapped_file_impl                impl_type;
+    typedef basic_mapped_file_params<detail::path>  param_type;
+    friend class mapped_file;
+    friend class detail::mapped_file_impl;
+    friend struct boost::iostreams::operations<mapped_file_source>;
+public:
+    typedef char                                    char_type;
+    struct category
+        : public source_tag,
+          public direct_tag,
+          public closable_tag
+        { };
+    typedef std::size_t                             size_type;
+    typedef const char*                             iterator;
+    BOOST_STATIC_CONSTANT(size_type, max_length = static_cast<size_type>(-1));
+
+    // Default constructor
+    mapped_file_source();
+
+    // Constructor taking a parameters object
+    template<typename Path>
+    explicit mapped_file_source(const basic_mapped_file_params<Path>& p);
+
+    // Constructor taking a list of parameters
+    template<typename Path>
+    explicit mapped_file_source( const Path& path,
+                                 size_type length = max_length,
+                                 boost::intmax_t offset = 0 );
+
+    // Copy Constructor
+    mapped_file_source(const mapped_file_source& other);
+
+    //--------------Stream interface------------------------------------------//
+
+    template<typename Path>
+    void open(const basic_mapped_file_params<Path>& p);
+
+    template<typename Path>
+    void open( const Path& path,
+               size_type length = max_length,
+               boost::intmax_t offset = 0 );
+
+    bool is_open() const;
+    void close();
+    operator safe_bool() const;
+    bool operator!() const;
+    mapmode flags() const;
+
+    //--------------Container interface---------------------------------------//
+
+    size_type size() const;
+    const char* data() const;
+    iterator begin() const;
+    iterator end() const;
+
+    //--------------Query admissible offsets----------------------------------//
+
+    // Returns the allocation granularity for virtual memory. Values passed
+    // as offsets must be multiples of this value.
+    static int alignment();
+
+private:
+    void init();
+    void open_impl(const param_type& p);
+
+    boost::shared_ptr<impl_type> pimpl_;
+};
+
+//------------------Definition of mapped_file---------------------------------//
+
+class BOOST_IOSTREAMS_DECL mapped_file : public mapped_file_base {
+private:
+    typedef mapped_file_source                      delegate_type;
+    typedef delegate_type::safe_bool                safe_bool;
+    typedef basic_mapped_file_params<detail::path>  param_type;
+    friend struct boost::iostreams::operations<mapped_file >;
+    friend class mapped_file_sink;
+public:
+    typedef char                                    char_type;
+    struct category
+        : public seekable_device_tag,
+          public direct_tag,
+          public closable_tag
+        { };
+    typedef mapped_file_source::size_type           size_type;
+    typedef char*                                   iterator;
+    typedef const char*                             const_iterator;
+    BOOST_STATIC_CONSTANT(size_type, max_length = delegate_type::max_length);
+
+    // Default constructor
+    mapped_file() { }
+
+    // Construstor taking a parameters object
+    template<typename Path>
+    explicit mapped_file(const basic_mapped_file_params<Path>& p);
+
+    // Constructor taking a list of parameters
+    template<typename Path>
+    mapped_file( const Path& path,
+                 mapmode flags,
+                 size_type length = max_length,
+                 stream_offset offset = 0 );
+
+    // Constructor taking a list of parameters, including a 
+    // std::ios_base::openmode (deprecated)
+    template<typename Path>
+    explicit mapped_file( const Path& path,
+                          BOOST_IOS::openmode mode =
+                              BOOST_IOS::in | BOOST_IOS::out,
+                          size_type length = max_length,
+                          stream_offset offset = 0 );
+
+    // Copy Constructor
+    mapped_file(const mapped_file& other);
+
+    //--------------Conversion to mapped_file_source (deprecated)-------------//
+
+    operator mapped_file_source&() { return delegate_; }
+    operator const mapped_file_source&() const { return delegate_; }
+
+    //--------------Stream interface------------------------------------------//
+
+    // open overload taking a parameters object
+    template<typename Path>
+    void open(const basic_mapped_file_params<Path>& p);
+
+    // open overload taking a list of parameters
+    template<typename Path>
+    void open( const Path& path,
+               mapmode mode,
+               size_type length = max_length,
+               stream_offset offset = 0 );
+
+    // open overload taking a list of parameters, including a 
+    // std::ios_base::openmode (deprecated)
+    template<typename Path>
+    void open( const Path& path,
+               BOOST_IOS::openmode mode =
+                   BOOST_IOS::in | BOOST_IOS::out,
+               size_type length = max_length,
+               stream_offset offset = 0 );
+
+    bool is_open() const { return delegate_.is_open(); }
+    void close() { delegate_.close(); }
+    operator safe_bool() const { return delegate_; }
+    bool operator!() const { return !delegate_; }
+    mapmode flags() const { return delegate_.flags(); }
+
+    //--------------Container interface---------------------------------------//
+
+    size_type size() const { return delegate_.size(); }
+    char* data() const;
+    const char* const_data() const { return delegate_.data(); }
+    iterator begin() const { return data(); }
+    const_iterator const_begin() const { return const_data(); }
+    iterator end() const { return data() + size(); }
+    const_iterator const_end() const { return const_data() + size(); }
+
+    //--------------Query admissible offsets----------------------------------//
+
+    // Returns the allocation granularity for virtual memory. Values passed
+    // as offsets must be multiples of this value.
+    static int alignment() { return mapped_file_source::alignment(); }
+
+    //--------------File access----------------------------------------------//
+
+    void resize(stream_offset new_size);
+private:
+    delegate_type delegate_;
+};
+
+//------------------Definition of mapped_file_sink----------------------------//
+
+class BOOST_IOSTREAMS_DECL mapped_file_sink : private mapped_file {
+public:
+    friend struct boost::iostreams::operations<mapped_file_sink>;
+    using mapped_file::mapmode;
+    using mapped_file::readonly;
+    using mapped_file::readwrite;
+    using mapped_file::priv;
+    using mapped_file::char_type;
+    struct category
+        : public sink_tag,
+          public direct_tag,
+          public closable_tag
+        { };
+    using mapped_file::size_type;
+    using mapped_file::iterator;
+    using mapped_file::max_length;
+    using mapped_file::is_open;
+    using mapped_file::close;
+    using mapped_file::operator safe_bool;
+    using mapped_file::operator !;
+    using mapped_file::flags;
+    using mapped_file::size;
+    using mapped_file::data;
+    using mapped_file::begin;
+    using mapped_file::end;
+    using mapped_file::alignment;
+    using mapped_file::resize;
+
+    // Default constructor
+    mapped_file_sink() { }
+
+    // Constructor taking a parameters object
+    template<typename Path>
+    explicit mapped_file_sink(const basic_mapped_file_params<Path>& p);
+
+    // Constructor taking a list of parameters
+    template<typename Path>
+    explicit mapped_file_sink( const Path& path,
+                               size_type length = max_length,
+                               boost::intmax_t offset = 0,
+                               mapmode flags = readwrite );
+
+    // Copy Constructor
+    mapped_file_sink(const mapped_file_sink& other);
+
+    // open overload taking a parameters object
+    template<typename Path>
+    void open(const basic_mapped_file_params<Path>& p);
+
+    // open overload taking a list of parameters
+    template<typename Path>
+    void open( const Path& path,
+               size_type length = max_length,
+               boost::intmax_t offset = 0,
+               mapmode flags = readwrite );
+};
+
+//------------------Implementation of mapped_file_source----------------------//
+
+template<typename Path>
+mapped_file_source::mapped_file_source(const basic_mapped_file_params<Path>& p)
+{ init(); open(p); }
+
+template<typename Path>
+mapped_file_source::mapped_file_source( 
+    const Path& path, size_type length, boost::intmax_t offset)
+{ init(); open(path, length, offset); }
+
+template<typename Path>
+void mapped_file_source::open(const basic_mapped_file_params<Path>& p)
+{
+    param_type params(p);
+    if (params.flags) {
+        if (params.flags != mapped_file::readonly)
+            boost::throw_exception(BOOST_IOSTREAMS_FAILURE("invalid flags"));
+    } else {
+        if (params.mode & BOOST_IOS::out)
+            boost::throw_exception(BOOST_IOSTREAMS_FAILURE("invalid mode"));
+        params.mode |= BOOST_IOS::in;
+    }
+    open_impl(params);
+}
+
+template<typename Path>
+void mapped_file_source::open(
+    const Path& path, size_type length, boost::intmax_t offset)
+{
+    param_type p(path);
+    p.length = length;
+    p.offset = offset;
+    open(p);
+}
+
+//------------------Implementation of mapped_file-----------------------------//
+
+template<typename Path>
+mapped_file::mapped_file(const basic_mapped_file_params<Path>& p)
+{ open(p); }
+
+template<typename Path>
+mapped_file::mapped_file( 
+    const Path& path, mapmode flags, 
+    size_type length, stream_offset offset )
+{ open(path, flags, length, offset); }
+
+template<typename Path>
+mapped_file::mapped_file( 
+    const Path& path, BOOST_IOS::openmode mode, 
+    size_type length, stream_offset offset )
+{ open(path, mode, length, offset); }
+
+template<typename Path>
+void mapped_file::open(const basic_mapped_file_params<Path>& p)
+{ delegate_.open_impl(p); }
+
+template<typename Path>
+void mapped_file::open( 
+    const Path& path, mapmode flags, 
+    size_type length, stream_offset offset )
+{
+    param_type p(path);
+    p.flags = flags;
+    p.length = length;
+    p.offset = offset;
+    open(p);
+}
+
+template<typename Path>
+void mapped_file::open( 
+    const Path& path, BOOST_IOS::openmode mode, 
+    size_type length, stream_offset offset )
+{
+    param_type p(path);
+    p.mode = mode;
+    p.length = length;
+    p.offset = offset;
+    open(p);
+}
+
+inline char* mapped_file::data() const 
+{ return (flags() != readonly) ? const_cast<char*>(delegate_.data()) : 0; }
+
+//------------------Implementation of mapped_file_sink------------------------//
+
+template<typename Path>
+mapped_file_sink::mapped_file_sink(const basic_mapped_file_params<Path>& p)
+{ open(p); }
+
+template<typename Path>
+mapped_file_sink::mapped_file_sink(
+    const Path& path, size_type length,
+    boost::intmax_t offset, mapmode flags )
+{ open(path, length, offset, flags); }
+
+template<typename Path>
+void mapped_file_sink::open(const basic_mapped_file_params<Path>& p)
+{
+    param_type params(p);
+    if (params.flags) {
+        if (params.flags & mapped_file::readonly)
+            boost::throw_exception(BOOST_IOSTREAMS_FAILURE("invalid flags"));
+    } else {
+        if (params.mode & BOOST_IOS::in)
+            boost::throw_exception(BOOST_IOSTREAMS_FAILURE("invalid mode"));
+        params.mode |= BOOST_IOS::out;
+    }
+    mapped_file::open(params);
+}
+
+template<typename Path>
+void mapped_file_sink::open(
+    const Path& path, size_type length,
+    boost::intmax_t offset, mapmode flags )
+{
+    param_type p(path);
+    p.flags = flags;
+    p.length = length;
+    p.offset = offset;
+    open(p);
+}
+
+//------------------Specialization of direct_impl-----------------------------//
+
+template<>
+struct operations<mapped_file_source>
+    : boost::iostreams::detail::close_impl<closable_tag>
+{
+    static std::pair<char*, char*>
+    input_sequence(mapped_file_source& src)
+    {
+        return std::make_pair( const_cast<char*>(src.begin()),
+                               const_cast<char*>(src.end()) );
+    }
+};
+
+template<>
+struct operations<mapped_file>
+    : boost::iostreams::detail::close_impl<closable_tag>
+{
+    static std::pair<char*, char*>
+    input_sequence(mapped_file& file)
+    { 
+        return std::make_pair(file.begin(), file.end()); 
+    }
+    static std::pair<char*, char*>
+    output_sequence(mapped_file& file)
+    { 
+        return std::make_pair(file.begin(), file.end()); 
+    }
+};
+
+template<>
+struct operations<mapped_file_sink>
+    : boost::iostreams::detail::close_impl<closable_tag>
+{
+    static std::pair<char*, char*>
+    output_sequence(mapped_file_sink& sink)
+    { 
+        return std::make_pair(sink.begin(), sink.end()); 
+    }
+};
+                    
+//------------------Definition of mapmode operators---------------------------//
+
+inline mapped_file::mapmode 
+operator|(mapped_file::mapmode a, mapped_file::mapmode b)
+{
+    return static_cast<mapped_file::mapmode>
+        (static_cast<int>(a) | static_cast<int>(b));
+}
+
+inline mapped_file::mapmode 
+operator&(mapped_file::mapmode a, mapped_file::mapmode b)
+{
+    return static_cast<mapped_file::mapmode>
+        (static_cast<int>(a) & static_cast<int>(b));
+}
+
+inline mapped_file::mapmode 
+operator^(mapped_file::mapmode a, mapped_file::mapmode b)
+{
+    return static_cast<mapped_file::mapmode>
+        (static_cast<int>(a) ^ static_cast<int>(b));
+}
+
+inline mapped_file::mapmode
+operator~(mapped_file::mapmode a)
+{
+    return static_cast<mapped_file::mapmode>(~static_cast<int>(a));
+}
+
+inline mapped_file::mapmode 
+operator|=(mapped_file::mapmode& a, mapped_file::mapmode b)
+{
+    return a = a | b;
+}
+
+inline mapped_file::mapmode 
+operator&=(mapped_file::mapmode& a, mapped_file::mapmode b)
+{
+    return a = a & b;
+}
+
+inline mapped_file::mapmode 
+operator^=(mapped_file::mapmode& a, mapped_file::mapmode b)
+{
+    return a = a ^ b;
+}
+
+} } // End namespaces iostreams, boost.
+
+#include <boost/config/abi_suffix.hpp> // pops abi_suffix.hpp pragmas
+
+#endif // #ifndef BOOST_IOSTREAMS_MAPPED_FILE_HPP_INCLUDED