32 lines
966 B
C++
32 lines
966 B
C++
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#include <fc/interprocess/mmap_struct.hpp>
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#include <fc/filesystem.hpp>
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#include <fc/io/fstream.hpp>
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#include <string.h>
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namespace fc
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{
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namespace detail
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{
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void mmap_struct_base::open( const fc::path& file, size_t s, bool create )
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{
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if( !fc::exists( file ) || fc::file_size(file) != s )
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{
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fc::ofstream out( file );
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char buffer[1024];
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memset( buffer, 0, sizeof(buffer) );
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size_t bytes_left = s;
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while( bytes_left > 0 )
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{
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size_t to_write = std::min<size_t>(bytes_left, sizeof(buffer) );
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out.write( buffer, to_write );
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bytes_left -= to_write;
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}
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}
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_file_mapping.reset( new fc::file_mapping( file.generic_string().c_str(), fc::read_write ) );
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_mapped_region.reset( new fc::mapped_region( *_file_mapping, fc::read_write, 0, s ) );
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}
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} // namespace fc
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} // namespace fc
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