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Revert "Cleanup: ring buffer: remove lib_ring_buffer_switch_new_end()"
[lttng-ust.git]
/
libringbuffer
/
frontend_api.h
diff --git
a/libringbuffer/frontend_api.h
b/libringbuffer/frontend_api.h
index b5406b0ef9d3678d44f706b23d66117b5659fd9e..a2a9af39aea777998c5d96cdde5f632f500c8cf7 100644
(file)
--- a/
libringbuffer/frontend_api.h
+++ b/
libringbuffer/frontend_api.h
@@
-126,6
+126,14
@@
int lib_ring_buffer_try_reserve(const struct lttng_ust_lib_ring_buffer_config *c
* boundary. It's safe to write.
*/
*o_end = *o_begin + ctx->slot_size;
+
+ if (caa_unlikely((subbuf_offset(*o_end, chan)) == 0))
+ /*
+ * The offset_end will fall at the very beginning of the next
+ * subbuffer.
+ */
+ return 1;
+
return 0;
}
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