Igor, Yes, it still crashes using istream and ostream to read and write. Additionally, when running the program with valgrind for memory debugging there appear to be numerous memory read and write errors within the call to istream::read(). -- Dylan On Sat, Feb 12, 2011 at 11:18 AM, Igor R wrote:

...

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));

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