Actually, the link you've posted is much simpler than the parent post: no assembly voodo required and no longjump shenanigans. It's also much easier to debug un

Actually, the link you've posted is much simpler than the parent post: no assembly voodo required and no longjump shenanigans. It's also much easier to debug under a debugger. I've successfully used this in production code. It effectively boils down to these 3 defines: #define COR_BEGIN(stateVar) switch(stateVar) { case 0:; #define COR_END(stateVar) }; stateVar = -1; #define COR_RETURN(stateVar) do { stateVar=__LINE__; return; case __LINE__:;} while (0) void dofunc(int* pstate) { COR_BEGIN(*pstate); while (computation1) COR_RETURN(*pstate); while (computation2) COR_RETURN(*pstate); COR_END(*pstate); }