I was thinking that this might need to be done to separate the head from tail in case head is incremented by ISR while this is called.

2012-01-09 23:16:53 +00:00
parent bf4cd368b0
commit 1006b642e7
1 changed files with 4 additions and 1 deletions
@@ -194,8 +194,11 @@ bool FIFO_Add(
 void FIFO_Flush(
    FIFO_BUFFER * b)
 {
+    unsigned head;        /* used to avoid volatile decision */
+
    if (b) {
-        b->tail = b->head;
+        head = b->head;
+        b->tail = head;
    }
 }