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std::ifstream multithread

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Hello,

I must read a lot of files like this

std::ifstream l_file;	

l_file.open(p_str1.c_str(), std::ifstream::binary);
std::copy( std::istream_iterator<char>(l_file), 
std::istream_iterator<char>(), 
std::ostreambuf_iterator<char>(&l_deflate) );
l_file.close();

I deflate the file content with bzip. I would do this in a multithread 
content, so my question is, can I do this without any problems during 
reading?
In some cases two thread can use the same file (p_str1 is in two 
threads equal). Can i read the same file out of two thread or is a 
mutex required?

Thanks

Phil

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std::ifstream multithread Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-05-27 12:22 +0200
  Re: std::ifstream multithread Victor Bazarov <v.bazarov@comcast.invalid> - 2011-05-27 08:31 -0400
    Re: std::ifstream multithread Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-05-27 15:04 +0200
      Re: std::ifstream multithread Victor Bazarov <v.bazarov@comcast.invalid> - 2011-05-27 09:19 -0400
        Re: std::ifstream multithread Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-05-27 16:51 +0200
  Re: std::ifstream multithread Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-05-27 15:17 +0000

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