Re: [boost] Persistency library

Subject: Re: [boost] Persistency library
From: Lifshitz, Yair (yair.lifshitz_at_[hidden])
Date: 2011-09-26 04:52:38

> > Practically, it is possible to achieve the same flexibility by using
> > setjmp()/longjmp() with minor effort.
>
> Are you aware of the C99 standard which defines setjmp()/longjmp() to provide non-local jumps but does not require that longjmp() preserves the current stack frame, e. g. jumping into a function which was exited via a call to > longjmp() is undefined?
>

Yes. The implementation I'm suggesting jumps into a function that hasn't exited yet.
In short, we dump a memory image of the process including the stack and the jump buffer.
The jump back is done into one of the predecessors of the image dump function, so the function has not exited yet.

The relevant local variables are marked as volatile and are therefore clearly defined.
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