diff options
| -rw-r--r-- | mu.arc | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/mu.arc b/mu.arc index d9d6321b..3bffa39f 100644 --- a/mu.arc +++ b/mu.arc @@ -868,6 +868,7 @@ ((chan channel) <- arg) ((val tagged-value) <- arg) { begin + ; block if chan is full ((full boolean) <- full? (chan channel)) ; race condition: might unnecessarily sleep if consumer routine reads from ; channel between previous check and the set to watch below @@ -895,6 +896,7 @@ ((default-scope scope-address) <- new (scope literal) (30 literal)) ((chan channel) <- arg) { begin + ; block if chan is empty ((empty boolean) <- empty? (chan channel)) ; race condition: might unnecessarily sleep if consumer routine writes to ; channel between previous check and the set to watch below @@ -918,9 +920,6 @@ (reply (result tagged-value) (chan channel))) ; An empty channel has first-empty and first-full both at the same value. -; A full channel has first-empty just before first-full, wasting one slot. -; (Other alternatives: https://en.wikipedia.org/wiki/Circular_buffer#Full_.2F_Empty_Buffer_Distinction) - (init-fn empty? ((default-scope scope-address) <- new (scope literal) (30 literal)) ((chan channel) <- arg) @@ -929,6 +928,8 @@ ((result boolean) <- eq (full integer) (free integer)) (reply (result boolean))) +; A full channel has first-empty just before first-full, wasting one slot. +; (Other alternatives: https://en.wikipedia.org/wiki/Circular_buffer#Full_.2F_Empty_Buffer_Distinction) (init-fn full? ((default-scope scope-address) <- new (scope literal) (30 literal)) ((chan channel) <- arg) |