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;
 }