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Docs: document the meaning of a ust app channel key set to 0
[lttng-tools.git]
/
src
/
bin
/
lttng-sessiond
/
ust-app.h
diff --git
a/src/bin/lttng-sessiond/ust-app.h
b/src/bin/lttng-sessiond/ust-app.h
index c3e37e0712b69b49274c1d6b6b16df30785d7343..7cc0d10aad3eeea499a23da90eefee78374b7a29 100644
(file)
--- a/
src/bin/lttng-sessiond/ust-app.h
+++ b/
src/bin/lttng-sessiond/ust-app.h
@@
-137,7
+137,11
@@
struct ust_app_channel {
int handle;
/* Channel and streams were sent to the UST tracer. */
int is_sent;
int handle;
/* Channel and streams were sent to the UST tracer. */
int is_sent;
- /* Unique key used to identify the channel on the consumer side. */
+ /*
+ * Unique key used to identify the channel on the consumer side.
+ * 0 is a reserved 'invalid' value used to indicate that the consumer
+ * does not know about this channel (i.e. an error occured).
+ */
uint64_t key;
/* Id of the tracing channel set on creation. */
uint64_t tracing_channel_id;
uint64_t key;
/* Id of the tracing channel set on creation. */
uint64_t tracing_channel_id;
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