src/common/events.c

   1
   2 #include <string.h>
   3
   4 #include "common/events.h"
   5 #include "common/jhash.h"
   6
   7 /*
   8  * Needed by comm layer.
   9  */
  10 struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session,
  11                 const struct lttng_ust_enum_desc *enum_desc)
  12 {
  13         struct lttng_enum *_enum;
  14         struct cds_hlist_head *head;
  15         struct cds_hlist_node *node;
  16         size_t name_len = strlen(enum_desc->name);
  17         uint32_t hash;
  18
  19         hash = jhash(enum_desc->name, name_len, 0);
  20         head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
  21         cds_hlist_for_each_entry(_enum, node, head, hlist) {
  22                 assert(_enum->desc);
  23                 if (_enum->desc == enum_desc)
  24                         return _enum;
  25         }
  26         return NULL;
  27 }