This file records the changes between different versions of CML.


CML 0.9.6 (10/11/91)
-------------------

- fixed bug in RunCML.exportFn

- fixed bug in wrapAbort.

- The version of callcc used by CML has an unsafe type; it has been moved to
  System.Unsafe.PolyCont, and this version of CML is modified accordingly.

- The type of callcc in the signature CONCUR_CALLCC has been changed to a weak
  type (since the other typing is unsound).

- Changed CIO.execute (and added CIO.execute_in_env) to track changes to SML/NJ's
  IO structure.  This also fixes a bug with the environment that is passed to
  the sub-process.


CML 0.9.5 (7/12/91)
-------------------

- fixed typing error in cio.sml, which was exposed by SML/NJ 0.70

- added always event constructor; this will replace the ALWAYS value,
  but we are keeping it around for backward compatibility.


CML 0.9.4 (6/1/91)
------------------

- renamed wait event constructor to threadWait

- added a total ordering on thread identifiers

- added waitUntil event constructor for synchronizing on an absolute time

- Changed poll to be an asynchronous version of sync (instead of an
  event constructor).

- Reimplemented the CIO library using guards and wrapAbort.  Made
  input, inputc and input_line operations synchronous (to match
  the SML IO signature) and added inputEvt, inputcEvt and inputLineEvt
  as event-valued forms.  Also added can_input and lookahead operations,
  and a mechanism for piping channels into and out of streams

- added condition variables

- moved the SafeCallCC functor to the library


CML 0.9.3 (internal version)
----------------------------
This version included the first implementation of guards and
wrapAbort.  It was used for the benchmarks in the SIGPLAN'91
PLDI paper.


CML 0.9.2 (1/15/91)
-------------------
This version (which actually had several minor releases) fixed a significant
space leak problem (sync was breaking tail recursion).
This fix required a patch to SML/NJ, which was included in version 0.68.
There wer also some minor patches to the CIO module.


CML 0.9.1 (internal version)
----------------------------
This version fixed some minor bugs and improved performance, but it
was never released.


CML 0.9 (10/1/91)
-----------------
This was the first release of CML
