What you describe is implemented in these libraries: libduma (http://duma.sourceforge.net/ http://duma.sourceforge.net/) and efence (http://linux.die.net/man/3/

What you describe is implemented in these libraries: libduma (http://duma.sourceforge.net/ http://duma.sourceforge.net/) and efence (http://linux.die.net/man/3/efence http://linux.die.net/man/3/efence) They also have buffer underflow protection (either overflow or underflow at a time). But in 32 bit systems, for applications that heavily use memory, you may run out of address space