diff mbox series

[v4,14/20] libtraceeval histogram: Add data copy callback

Message ID 20230817204528.114577-15-rostedt@goodmis.org (mailing list archive)
State Accepted
Headers show
Series libtraceeval histogram: Updates | expand

Commit Message

Steven Rostedt Aug. 17, 2023, 8:45 p.m. UTC 
From: "Steven Rostedt (Google)" <rostedt@goodmis.org>

Add a callback "copy" to the type that gets called when a copy is done.
This is can be used to copy dynamic types. Otherwise the old one is just
going to be released.

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 include/traceeval-hist.h | 5 +++++
 src/histograms.c         | 3 +++
 2 files changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/include/traceeval-hist.h b/include/traceeval-hist.h
index e8a7981ac2c0..a87f39afc050 100644
--- a/include/traceeval-hist.h
+++ b/include/traceeval-hist.h
@@ -82,6 +82,10 @@  typedef int (*traceeval_data_hash_fn)(struct traceeval *teval,
 				      const struct traceeval_type *type,
 				      const union traceeval_data *data);
 
+typedef int (*traceeval_data_copy_fn)(const struct traceeval_type *type,
+				      union traceeval_data *dst,
+				      const union traceeval_data *src);
+
 /*
  * struct traceeval_type - Describes the type of a traceevent_data instance
  * @type: The enum type that describes the traceeval_data
@@ -126,6 +130,7 @@  struct traceeval_type {
 	size_t				id;
 	traceeval_data_release_fn	release;
 	traceeval_data_cmp_fn		cmp;
+	traceeval_data_copy_fn		copy;
 	traceeval_data_hash_fn		hash;
 };
 
diff --git a/src/histograms.c b/src/histograms.c
index c4ff632b4f87..08d711239284 100644
--- a/src/histograms.c
+++ b/src/histograms.c
@@ -511,6 +511,9 @@  static int copy_traceeval_data(struct traceeval_type *type,
 {
 	unsigned long long val;
 
+	if (type->copy)
+		return type->copy(type, dst, src);
+
 	*dst = *src;
 
 	switch(type->type) {