[Boost-users] [asio] Run-time error with asio::streambuf

Subject: [Boost-users] [asio] Run-time error with asio::streambuf
From: Dylan Klomparens (dylan.klomparens_at_[hidden])
Date: 2011-02-11 12:09:24

I've experienced problems using asio::streambuf and am hoping someone can
tell me if I'm using the class incorrectly. When I run this example code it
segfaults. Why?

To make things more confusing, this code works on Windows (Visual Studio
2008), but does not work on Linux (with gcc 4.4.1).

-- Dylan

#include <boost/asio.hpp>
using namespace std;

int main()
{
        boost::asio::streambuf Stream;

        // Put 4 bytes into the streambuf...
        int SetValue = 0xaabbccdd;
        Stream.sputn(reinterpret_cast<const char*>(&SetValue),
sizeof(SetValue));

        // Consume 3 of the bytes...
        Stream.consume(3);
        cout << Stream.size() << endl; // should output 1

        // Get the last byte...
        char GetValue;
        // -------------------------- The next line segfaults the program
--------------------------
        Stream.sgetn(reinterpret_cast<char*>(&GetValue), sizeof(GetValue));
        cout << Stream.size() << endl; // should output 0

        return 0;
}