Added boost header

test/external/boost/interprocess/detail/file_wrapper.hpp

@@ -0,0 +1,202 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2006. 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)
+//
+// See http://www.boost.org/libs/interprocess for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTERPROCESS_DETAIL_FILE_WRAPPER_HPP
+#define BOOST_INTERPROCESS_DETAIL_FILE_WRAPPER_HPP
+
+#include <boost/interprocess/detail/config_begin.hpp>
+#include <boost/interprocess/detail/workaround.hpp>
+#include <boost/interprocess/detail/os_file_functions.hpp>
+#include <boost/interprocess/creation_tags.hpp>
+#include <boost/interprocess/detail/move.hpp>
+#include <boost/interprocess/creation_tags.hpp>
+
+namespace boost {
+namespace interprocess {
+namespace ipcdetail{
+
+class file_wrapper
+{
+   /// @cond
+   BOOST_MOVABLE_BUT_NOT_COPYABLE(file_wrapper)
+   /// @endcond
+   public:
+
+   //!Default constructor.
+   //!Represents an empty file_wrapper.
+   file_wrapper();
+
+   //!Creates a file object with name "name" and mode "mode", with the access mode "mode"
+   //!If the file previously exists, throws an error.
+   file_wrapper(create_only_t, const char *name, mode_t mode, const permissions &perm = permissions())
+   {  this->priv_open_or_create(ipcdetail::DoCreate, name, mode, perm);  }
+
+   //!Tries to create a file with name "name" and mode "mode", with the
+   //!access mode "mode". If the file previously exists, it tries to open it with mode "mode".
+   //!Otherwise throws an error.
+   file_wrapper(open_or_create_t, const char *name, mode_t mode, const permissions &perm  = permissions())
+   {  this->priv_open_or_create(ipcdetail::DoOpenOrCreate, name, mode, perm);  }
+
+   //!Tries to open a file with name "name", with the access mode "mode". 
+   //!If the file does not previously exist, it throws an error.
+   file_wrapper(open_only_t, const char *name, mode_t mode)
+   {  this->priv_open_or_create(ipcdetail::DoOpen, name, mode, permissions());  }
+
+   //!Moves the ownership of "moved"'s file to *this. 
+   //!After the call, "moved" does not represent any file. 
+   //!Does not throw
+   file_wrapper(BOOST_RV_REF(file_wrapper) moved)
+      :  m_handle(file_handle_t(ipcdetail::invalid_file()))
+   {  this->swap(moved);   }
+
+   //!Moves the ownership of "moved"'s file to *this.
+   //!After the call, "moved" does not represent any file.
+   //!Does not throw
+   file_wrapper &operator=(BOOST_RV_REF(file_wrapper) moved)
+   {  
+      file_wrapper tmp(boost::interprocess::move(moved));
+      this->swap(tmp);
+      return *this;  
+   }
+
+   //!Swaps to file_wrappers.
+   //!Does not throw
+   void swap(file_wrapper &other);
+
+   //!Erases a file from the system.
+   //!Returns false on error. Never throws
+   static bool remove(const char *name);
+   
+   //!Sets the size of the file
+   void truncate(offset_t length);
+
+   //!Closes the
+   //!file
+   ~file_wrapper();
+
+   //!Returns the name of the file
+   //!used in the constructor
+   const char *get_name() const;
+
+   //!Returns the name of the file
+   //!used in the constructor
+   bool get_size(offset_t &size) const;
+
+   //!Returns access mode
+   //!used in the constructor
+   mode_t get_mode() const;
+
+   //!Get mapping handle
+   //!to use with mapped_region
+   mapping_handle_t get_mapping_handle() const;
+
+   private:
+   //!Closes a previously opened file mapping. Never throws.
+   void priv_close();
+   //!Closes a previously opened file mapping. Never throws.
+   bool priv_open_or_create(ipcdetail::create_enum_t type, const char *filename, mode_t mode, const permissions &perm);
+
+   file_handle_t  m_handle;
+   mode_t      m_mode;
+   std::string       m_filename;
+};
+
+inline file_wrapper::file_wrapper() 
+   :  m_handle(file_handle_t(ipcdetail::invalid_file()))
+{}
+
+inline file_wrapper::~file_wrapper() 
+{  this->priv_close(); }
+
+inline const char *file_wrapper::get_name() const
+{  return m_filename.c_str(); }
+
+inline bool file_wrapper::get_size(offset_t &size) const
+{  return get_file_size((file_handle_t)m_handle, size);  }
+
+inline void file_wrapper::swap(file_wrapper &other)
+{  
+   std::swap(m_handle,  other.m_handle);
+   std::swap(m_mode,    other.m_mode);
+   m_filename.swap(other.m_filename);   
+}
+
+inline mapping_handle_t file_wrapper::get_mapping_handle() const
+{  return mapping_handle_from_file_handle(m_handle);  }
+
+inline mode_t file_wrapper::get_mode() const
+{  return m_mode; }
+
+inline bool file_wrapper::priv_open_or_create
+   (ipcdetail::create_enum_t type, 
+    const char *filename,
+    mode_t mode,
+    const permissions &perm = permissions())
+{
+   m_filename = filename;
+
+   if(mode != read_only && mode != read_write){
+      error_info err(mode_error);
+      throw interprocess_exception(err);
+   }
+
+   //Open file existing native API to obtain the handle
+   switch(type){
+      case ipcdetail::DoOpen:
+         m_handle = open_existing_file(filename, mode);
+      break;
+      case ipcdetail::DoCreate:
+         m_handle = create_new_file(filename, mode, perm);
+      break;
+      case ipcdetail::DoOpenOrCreate:
+         m_handle = create_or_open_file(filename, mode, perm);
+      break;
+      default:
+         {
+            error_info err = other_error;
+            throw interprocess_exception(err);
+         }
+   }
+
+   //Check for error
+   if(m_handle == invalid_file()){
+      throw interprocess_exception(error_info(system_error_code()));
+   }
+
+   m_mode = mode;
+   return true;
+}
+
+inline bool file_wrapper::remove(const char *filename)
+{  return delete_file(filename); }
+
+inline void file_wrapper::truncate(offset_t length)
+{
+   if(!truncate_file(m_handle, length)){
+      error_info err(system_error_code());
+      throw interprocess_exception(err);
+   }
+}
+
+inline void file_wrapper::priv_close()
+{
+   if(m_handle != invalid_file()){
+      close_file(m_handle);
+      m_handle = invalid_file();
+   }
+}
+
+}  //namespace ipcdetail{
+}  //namespace interprocess {
+}  //namespace boost {
+
+#include <boost/interprocess/detail/config_end.hpp>
+
+#endif   //BOOST_INTERPROCESS_DETAIL_FILE_WRAPPER_HPP