YuuichiNakamura commented on a change in pull request #1377:
URL: https://github.com/apache/incubator-nuttx/pull/1377#discussion_r493668548
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File path: drivers/note/noteram_driver.c
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@@ -57,28 +58,33 @@ struct noteram_info_s
{
volatile unsigned int ni_head;
volatile unsigned int ni_tail;
+ volatile unsigned int ni_read;
Review comment:
Same as
https://github.com/apache/incubator-nuttx/pull/1377#discussion_r493667049
I have wanted to introduce non-destructive read to /dev/note.
It is useful for example no overwrite mode in on-boot instrumentation. After
boot, the instrumentation data while boot is kept in the circular buffer and
never lost until new instrumentation is started even when we read the data.
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