Clarify condition on BUF_SIZE in monitor example.
authorBen Pfaff <blp@cs.stanford.edu>
Tue, 21 Nov 2006 13:04:33 +0000 (13:04 +0000)
committerBen Pfaff <blp@cs.stanford.edu>
Tue, 21 Nov 2006 13:04:33 +0000 (13:04 +0000)
Thanks to Terje Mathiesen for pointing out this issue.

doc/reference.texi

index 5e4db9e8fc482065383f73f5fe4bb7f7049b4571..3d7d9bcbd2bbb2df58152293f4b09173cb60aff4 100644 (file)
@@ -844,6 +844,11 @@ char get (void) @{
 @}
 @end example
 
+Note that @code{BUF_SIZE} must divide evenly into @code{SIZE_MAX + 1}
+for the above code to be completely correct.  Otherwise, it will fail
+the first time @code{head} wraps around to 0.  In practice,
+@code{BUF_SIZE} would ordinarily be a power of 2.
+
 @node Optimization Barriers
 @subsection Optimization Barriers