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63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2006-2007. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/interprocess for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#include <boost/interprocess/detail/config_begin.hpp>
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//[doc_file_mapping
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#include <boost/interprocess/file_mapping.hpp>
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#include <boost/interprocess/mapped_region.hpp>
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#include <iostream>
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#include <fstream>
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#include <cstring>
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#include <cstddef>
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#include <cstdio> //std::remove
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int main ()
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{
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using namespace boost::interprocess;
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try{
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//Create a file
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std::filebuf fbuf;
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fbuf.open("file.bin", std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc | std::ios_base::binary);
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//Set the size
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fbuf.pubseekoff(9999, std::ios_base::beg);
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fbuf.sputc(0);
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fbuf.close();
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//Create a file mapping.
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file_mapping m_file("file.bin", read_write);
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//Map the whole file in this process
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mapped_region region
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(m_file //What to map
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,read_write //Map it as read-write
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);
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if(region.get_size() != 10000)
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return 1;
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//Get the address of the mapped region
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void * addr = region.get_address();
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std::size_t size = region.get_size();
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//Write all the memory to 1
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std::memset(addr, 1, size);
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}
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catch(interprocess_exception &ex){
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std::remove("file.bin");
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std::cout << ex.what() << std::endl;
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return 1;
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}
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return 0;
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}
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//]
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#include <boost/interprocess/detail/config_end.hpp>
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