When calling unmap on a mapped buffer for which the callback hasn't
fired yet, the callback should be called with UNKNOWN. The code marked
the callback as called only after calling it, causing problems with
re-entrancy where the callback would be called twice.
This could also get triggered by destroying the buffer inside the
callback.
Fix this in backend::Buffer and the WireClient and add test for both.
This directory used to contain both the state tracking code for the
backends, and the common utilities that could be used both by the
backends and the rest of the code. Things are now:
- src/common is utility code for the whole repo
- src/backend contains libNXT's code
- src/utils is utility code that we don't want in libNXT
This commit also changes all includes to use global paths from src/
bacause it had to touch a bunch of #include statements anyway.
This also expands the Buffer validation tests to cover more creation
code paths and SetSubData. It also introduces a mechanism for
ValidationTests to check for device errors.
