From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
Add a way to remove an entry that's in the traceeval. Currently there's
only ways to add entries, but there also needs to be a way to remove them
too.
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
include/traceeval-hist.h | 3 +++
src/histograms.c | 29 +++++++++++++++++++++++++++++
2 files changed, 32 insertions(+)
diff --git a/include/traceeval-hist.h b/include/traceeval-hist.h
index 37147d626fbb..8e5a6451f399 100644
--- a/include/traceeval-hist.h
+++ b/include/traceeval-hist.h
@@ -160,6 +160,9 @@ int traceeval_insert(struct traceeval *teval,
const union traceeval_data *keys,
const union traceeval_data *vals);
+int traceeval_remove(struct traceeval *teval,
+ const union traceeval_data *keys);
+
int traceeval_query(struct traceeval *teval, const union traceeval_data *keys,
const union traceeval_data **results);
diff --git a/src/histograms.c b/src/histograms.c
index c16b8866b84a..f35d1b2e583d 100644
--- a/src/histograms.c
+++ b/src/histograms.c
@@ -934,6 +934,35 @@ int traceeval_insert(struct traceeval *teval,
return update_entry(teval, entry, vals);
}
+/**
+ * traceeval_remove - remove an item from the traceeval descriptor
+ * @teval: The descriptor to insert into
+ * @keys: The list of keys that defines what is being removed
+ *
+ * This is the opposite of traceeval_insert(). Instead of inserting
+ * an item into the traceeval historgram, it removes it.
+ *
+ * Returns 1 if it found and removed an item,
+ * 0 if it did not find an time matching @keys
+ * -1 if there was an error.
+ */
+int traceeval_remove(struct traceeval *teval,
+ const union traceeval_data *keys)
+{
+ struct hash_table *hist = teval->hist;
+ struct entry *entry;
+ int check;
+
+ entry = NULL;
+ check = get_entry(teval, keys, &entry);
+
+ if (check < 1)
+ return check;
+
+ hash_remove(hist, &entry->hash);
+ return 1;
+}
+
/**
* traceeval_iterator_put - release a given iterator
* @iter: The iterartor to release
--
2.40.1
|