X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=parallel.h;h=a8a748fdce036e0ac5ce5cb3bdbe315512e75357;hb=b955d8410f03c81aaac9406a8e335229bb8baf51;hp=19616e43f64b9aeba95b4dc21e973ec571eab7a9;hpb=e7355cdc61d082bc1d25a4d460736680e8d1dba2;p=moebius2.git

diff --git a/parallel.h b/parallel.h
index 19616e4..a8a748f 100644
--- a/parallel.h
+++ b/parallel.h
@@ -29,7 +29,7 @@
  *   - function must not modify anything other than
  *      its return value (for cost computation functions, COST()) or
  *      its designated output (for precomputation functions, PRECOMP())
- *        (which latter it may not read)
+ *       and in the latter case it may not read other parts of its output
  *   - function must of course be reentrant
  */
 
@@ -49,6 +49,9 @@ void inparallel(const struct Vertices *vertices,
    * secdatasz, passed as secdata, uninitialised on entry.
    * After all the copies have finished, `combine' is invoked
    * nsections times sequentially, with the same sets of arguments.
+   * inparallel is NOT itself reentrant.
    */
 
+void inparallel_barrier(void);
+
 #endif /*PARALLEL_H*/