Move lttng_ust_enum_get_from_desc to libcommon

[lttng-ust.git] / src / common / events.c

diff --git a/src/common/events.c b/src/common/events.c
new file mode 100644 (file)
index 0000000..f70a1b4
--- /dev/null
+++ b/src/common/events.c
@@ -0,0 +1,27 @@
+
+#include <string.h>
+
+#include "common/events.h"
+#include "common/jhash.h"
+
+/*
+ * Needed by comm layer.
+ */
+struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session,
+               const struct lttng_ust_enum_desc *enum_desc)
+{
+       struct lttng_enum *_enum;
+       struct cds_hlist_head *head;
+       struct cds_hlist_node *node;
+       size_t name_len = strlen(enum_desc->name);
+       uint32_t hash;
+
+       hash = jhash(enum_desc->name, name_len, 0);
+       head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
+       cds_hlist_for_each_entry(_enum, node, head, hlist) {
+               assert(_enum->desc);
+               if (_enum->desc == enum_desc)
+                       return _enum;
+       }
+       return NULL;
+}