* minimise core code hooks
* drop useless exporting of private functions (and make them static)
* reorder functions in eve.c so no prototypes are needed
* drop massive header include and add double include barrier in eve.h
While testing, I found two already existing bugs:
* the variable 'a' passed to iconv_convert() needs to be passed by
reference in order to allow for the desired side effect.
* Somehow the trailing junk after an iconv_conversion to a shorter
string messes things up (and gets printed!). I couldn't exactly find
out why this happens, but setting (*p) = 0; solves this problem.
-d was broken because fork-to-background was done after the update thread creation, so the
threads ended up in the wrong process. This delays the thread creation until after the fork.
Originally, I was experiencing sporadic lockups when reading inotify_fd;
which is strange, since it is protected by select(). This should fix it
despite of the original problem.
Create each thread upon registration of the callback function, then use
semaphores to signal when it's time to update and when updating is
finished.
Many thanks to pavelo who originally came up with the idea for this.
Yes, I also thought these are monotonic counters. But it seems like they
are not, at least sometimes the value decreases by 1 leading to a very
very high cpu usage percentage being printed.
These macros can be used just like their OBJ() and OBJ_IF()
counterparts, just that they bail out hard when arg is unset. While
here, also cleanup the macro definition by using __* macros and fully
cleanup the macro namespace when the job is done.
Although this makes conky kind of less robust when it comes to
configuration errors, aborting is the right thing to do to avoid
ambiguity between unknown text objects.
Normally, this is not enough reason to remove code, but in this case it
means that either the tester always had $nvidia (if enabled) or $combine
also in her setup, or it was working without (which I guess, since there
is duplicate code in update_apcupsd()).
