- fixed planet to actually use the uninstalled (.plt file) cache
- linkage code was completely broken, so it now stubbed out (see the file to
resurrect it)
- other minor cleanups
- Simplify code
- Remove bogus leftover (tests) in the end
- Resolve deadlock that resulted from using `tcp-abandon-port' in
`net/ftp'
- Actually there's no need for threads, probably because of small size
of data, so keep it.
- Use scribble syntax instead of here-strings, and move the text out of
the way.
Shared locking now allowed only on input port, and exclusive
locking is allowed only on output ports, which allows an implementation
via fcntl(...,F_SETLK,...).
being edited in DrRacket (via places)
Added an API to let tools have access to that
information (and compute more stuff)
Used that to make an online version of Check Syntax
which led to a separately callable Check Syntax API.
Although a future thread used an atomic compare-and-swap to
set "is a list" or "not a list" flag on pairs via the
JIT-implemented `list?', the hashing function in the runtime
thread did not; as a result, it might be possible to lose
a hash code due to cache inconsistency (although I'm not
sure it's actually possible, and I couldn't trigger a problem
with a test). Most of the changes are related to using
an atomic compare-and-swap when setting a hash code, as
well as clean-ups to related code. Processor-count tests
avoid using atomic compare-and-swap on uniprocessors, which
might not support the relevant machine instructions.
As significantly, the compare-and-swap operation for the
JIT-implemented `list?' did not actually set flags on
a pair that has a hash code. This could lead to `list?'
tests that were not constant time (but only if the relevant
pair's `eq?' hash code had been used previously).
* a single function to set up all environment parameters.
* improve `getarg's treatment of default thunk
* Add an error display handler that doesn't show the context and instead
add a ,bt command to show it.
