X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Ftrace-chunk-registry.h;h=5442d7997893eb744121d7661706d677fcbae127;hp=0eee0c21c4e918ce14d2c6ebccc8f21cf25c9379;hb=c5c79321eb1937f3d208210365c512f4a186ec2a;hpb=72c696e8fb82949915fe107851169fdea87ae8bc

diff --git a/src/common/trace-chunk-registry.h b/src/common/trace-chunk-registry.h
index 0eee0c21c..5442d7997 100644
--- a/src/common/trace-chunk-registry.h
+++ b/src/common/trace-chunk-registry.h
@@ -57,6 +57,29 @@ void lttng_trace_chunk_registry_destroy(
 struct lttng_trace_chunk *lttng_trace_chunk_registry_publish_chunk(
 		struct lttng_trace_chunk_registry *registry,
 		uint64_t session_id, struct lttng_trace_chunk *chunk);
+/*
+ * Adds the `previously_published` parameter which allows the caller
+ * to know if a trace chunk equivalent to `chunk` was previously published.
+ * 
+ * The registry holds a reference to the published trace chunks it contains.
+ * Trace chunks automatically unpublish themselves from their registry on
+ * destruction.
+ *
+ * This information is necessary to drop the reference of newly published
+ * chunks when a user doesn't wish to explicitly maintain all references
+ * to a given trace chunk.
+ * 
+ * For instance, the relay daemon doesn't need the registry to hold a
+ * reference since it controls the lifetime of its trace chunks.
+ * Conversely, the consumer daemons rely on the session daemon to inform
+ * them of the end of life of a trace chunk and the trace chunks don't
+ * belong to a specific top-level object: they are always retrieved from
+ * the registry by `id`.
+ */
+struct lttng_trace_chunk *lttng_trace_chunk_registry_publish_chunk(
+		struct lttng_trace_chunk_registry *registry,
+		uint64_t session_id, struct lttng_trace_chunk *chunk,
+		bool *previously_published);
 
 /*
  * Look-up a trace chunk by session_id and chunk_id.