core: handle memory accounting correctly

When a translator stops, memory accounting for that translator is not
destroyed (because there could remain memory allocated that references
it), but mutexes that coordinate updates of memory accounting were
destroyed. This caused incorrect memory accounting and even crashes in
debug mode.

This patch also fixes some other things:

* Reduce the number of atomic operations needed to manage memory
  accounting.
* Correctly account memory when realloc() is used.
* Merge two critical sections into one.
* Cleaned the code a bit.

Backport of:
> Change-Id: Id5eaee7338729b9bc52c931815ca3ff1e5a7dcc8
> BUG: bz#1659334
> Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>

Change-Id: Id5eaee7338729b9bc52c931815ca3ff1e5a7dcc8
Fixes: bz#1702271
Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>

0 files changed, 0 insertions, 0 deletions