exit() on OOM

[minaguib]

Hi

In a few places, if hiredis gets out of memory, it calls exit()

This is unlikely, however since hiredis is a library, I'd like it if program control is dictated by the caller.

I think functions that OOM should just return failure to the user. Alternatively, the user at init time can supply a pointer to his own OOM function to be called.

I'd prefer the first approach, and don't mind implementing it if all's in consensus.

Thoughts welcome.

[pietern]

This was on my list of things to do for a while and added this today (for the blocking API at least, the async API is a pain since it depends on other libs etc).