handler-case added to spawn. Unhandled conditions signalled by a process
will kill that process, rather than interrupting the entire lisp image.
This provides a convenient way to kill processes, by signalling a
condition. In later patches, the handler-case for may include code for
sending termination messages to linked processes.

darcs-hash:509f7ea7b914a07ef22d1fa7d4847d4ec6493a29

darcs-hash:d22155eb824039cbca604a873b55fd5ecc39ff0d

* src/messaging.lisp (*time-units*, time-unit-p, timeout-pattern-p)
(timeout-factor, timeout-milliseconds, parse-receive-clauses): Expanded
timeout clause syntax to support time-units.

* test/messaging.lisp (receive-with-timeout): Expanded test to use timeout
clauses with time-units.

darcs-hash:978f85e96b210e7376ce6c9cbd44218541f12ad0

* src/compatibility.lisp (with-timeout): New macro to abort evaluation
after a certain number of milliseconds.

* src/messaging.lisp (parse-receive-clauses,maybe-wrap-in-timeout)
(generate-receive): Implement timeout clauses for RECEIVE.

* test/messaging.lisp (receive-with-timeout): Added test for RECEIVE with
timeout clause.

darcs-hash:d6aee7410b7d6ee24b48c9eee53474a5bad418fb

Small fixups for pattern matching tests. (dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-10)

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-10
Keywords:

* src/matcher.lisp: Made COND- and CASE-MATCHER's bound variables
  IGNORABLE.
* test/matcher.lisp: Fixed missing EQL and EQ instead of EQL.

darcs-hash:89cb44bab19f800eb4ddc2c6122ee05aa3724068

Implemented message passing for threaded processes. (dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-9)

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-9
Keywords:

* src/compatibility.lisp: Added mutexes and events/conditions/signals/
  whatever you like to call them.

* src/mailbox.lisp: Complicated the API :( to make sure each message is
  tested against each RECEIVE only once.
* test/mailbox.lisp: Refactored TAKE-IF test.

* src/process.lisp: Added much needed synchronization to threaded
  processes.

* src/messaging.lisp: Implemented message sending and receiving for
  threaded processes.
* test/messaging.lisp: Tests message sending and receiving.

darcs-hash:d256ef0eee457a48d5b9556a43fd6dab1c33daec

Easier to use pattern matching API. (dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-8)

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-8
Keywords:

* src/matcher.lisp: Easier to use API through MATCH(-WITH-MATCHER.  Added
  COND-MATCHER and made it the default.
* test/matcher.lisp: Added tests for MATCH and for COND-MATCHER and
  CASE-MATCHER through MATCH-WITH-MATCHER.

darcs-hash:8d3e78d89b88efe5347fca3bfd49d24a174aafba

Added pattern matcher API and simplistic "matcher". (dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-7)

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-7
Keywords:

* erlisp.asd, src/matcher.lisp, test/matcher.lisp: Added pattern
  matcher API and simplistic "matcher".

darcs-hash:b21ccfd48d741c2a3424f5ab4e2947aa6774a62b

Added threaded processes without communication. (dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-6)

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-6
Keywords:

* src/compatibility.lisp: Wrappers around (implementation specific) threading.

* src/node.lisp, test/node.lisp: Dummy node functionality.

* src/process.lisp, test/process.lisp: Threaded process implementation
  without communication support.

* erlisp.asd: Added dependencies on new files.

darcs-hash:cfd6e62e686598184e1f09e9933046850ad6974c

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-5
Keywords:

* erlisp.asd, src/mailbox.lisp, src/package.lisp, test/mailbox.lisp,
  test/suite.lisp: Reindented license notice.

darcs-hash:9898c9687edfb923369252057a825c6e89cb3f0f

Fixed grammatical mistake in license. (dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-4)

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-4
Keywords:

* erlisp.asd, src/package.lisp, src/mailbox.lisp, test/suite.lisp,
  test/mailbox.lisp: Fixed grammatical mistake in license.

darcs-hash:eea52f06560216480388105ff8613b474a2c9b6a

Added test trying to take a non-existant message from a mailbox. (dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-3)

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-3
Keywords:

* test/mailbox.lisp (mailbox-take-if): Added test trying to take a
  non-existant message from a mailbox.

darcs-hash:77715b8d9612267ec6622d82ebe643ce716f0e0c

Added copyright and BSD license information. (dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-2)

dirk@dirkgerrits.com--lisp-2004/erlisp--mainline--0.1--patch-2
Keywords:

* erlisp.asd, src/package.lisp, src/mailbox.lisp, test/mailbox.lisp,
  test/suite.lisp: Added copyright and BSD license information.

darcs-hash:d3f0e744b4e75f3b09c39b51a4e6e4dd92ff091f

darcs-hash:350b8c7e8f0dfe6823427ca4fd45dee661d27026