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

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 using namespace std;

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

        // Put 4 bytes into the streambuf...         int SetValue = 0xaabbccdd;         Stream.sputn(reinterpret_cast(&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(&GetValue), sizeof(GetValue));         cout << Stream.size() << endl; // should output 0

        return 0; }

If you write with: std::ostream(&Stream).write(reinterpret_cast(&SetValue), sizeof(SetValue)); and read with: std::istream(&Stream).read(reinterpret_cast(&SetValue), sizeof(SetValue)); does it crash?