Rename lttng_ust_enum_get to lttng_ust_enum_get_from_desc

[lttng-ust.git] / liblttng-ust / ust-core.c

diff --git a/liblttng-ust/ust-core.c b/liblttng-ust/ust-core.c
index 60cdbfa91a2c876f5d5ae05db7a6ceae2a065df6..76f729a6720af105a7f120780ed2da16430b8e11 100644 (file)
--- a/liblttng-ust/ust-core.c
+++ b/liblttng-ust/ust-core.c
@@ -18,9 +18,12 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <stdlib.h>
 #include <lttng/ust-events.h>
 #include <usterr-signal-safe.h>
+#include "lttng-tracer-core.h"
+#include "jhash.h"
 
 static CDS_LIST_HEAD(lttng_transport_list);
 
@@ -56,3 +59,58 @@ void lttng_transport_unregister(struct lttng_transport *transport)
 {
        cds_list_del(&transport->node);
 }
+
+/*
+ * Needed by comm layer.
+ */
+struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session,
+               const struct lttng_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->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;
+}
+
+size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset)
+{
+       size_t size = 0;
+
+       size += lib_ring_buffer_align(offset, lttng_alignof(char));
+       size += sizeof(char);           /* tag */
+       return size;
+}
+
+void lttng_ust_dummy_record(struct lttng_ctx_field *field,
+                struct lttng_ust_lib_ring_buffer_ctx *ctx,
+                struct lttng_channel *chan)
+{
+       char sel_char = (char) LTTNG_UST_DYNAMIC_TYPE_NONE;
+
+       lib_ring_buffer_align_ctx(ctx, lttng_alignof(sel_char));
+       chan->ops->event_write(ctx, &sel_char, sizeof(sel_char));
+}
+
+void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
+               struct lttng_ctx_value *value)
+{
+       value->sel = LTTNG_UST_DYNAMIC_TYPE_NONE;
+}
+
+int lttng_context_is_app(const char *name)
+{
+       if (strncmp(name, "$app.", strlen("$app.")) != 0) {
+               return 0;
+       }
+       return 1;
+}