X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=liblttng-ust%2Fust-core.c;h=e8dff983279e3ec869ca9bb7b15274852e300919;hb=ebabbf580131acd1fe246c4d31fc5c044d36a038;hp=60cdbfa91a2c876f5d5ae05db7a6ceae2a065df6;hpb=828c801ed0e0b82bb06421f561fc2d31184730e8;p=lttng-ust.git

diff --git a/liblttng-ust/ust-core.c b/liblttng-ust/ust-core.c
index 60cdbfa9..e8dff983 100644
--- a/liblttng-ust/ust-core.c
+++ b/liblttng-ust/ust-core.c
@@ -18,11 +18,17 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
+#include <stdint.h>
+#include <stddef.h>
 #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);
+static CDS_LIST_HEAD(lttng_counter_transport_list);
 
 struct lttng_transport *lttng_transport_find(const char *name)
 {
@@ -35,6 +41,17 @@ struct lttng_transport *lttng_transport_find(const char *name)
 	return NULL;
 }
 
+struct lttng_counter_transport *lttng_counter_transport_find(const char *name)
+{
+	struct lttng_counter_transport *transport;
+
+	cds_list_for_each_entry(transport, &lttng_counter_transport_list, node) {
+		if (!strcmp(transport->name, name))
+			return transport;
+	}
+	return NULL;
+}
+
 /**
  * lttng_transport_register - LTT transport registration
  * @transport: transport structure
@@ -56,3 +73,80 @@ void lttng_transport_unregister(struct lttng_transport *transport)
 {
 	cds_list_del(&transport->node);
 }
+
+/**
+ * lttng_counter_transport_register - LTTng counter transport registration
+ * @transport: transport structure
+ *
+ * Registers a counter transport which can be used as output to extract
+ * the data out of LTTng. Called with ust_lock held.
+ */
+void lttng_counter_transport_register(struct lttng_counter_transport *transport)
+{
+	cds_list_add_tail(&transport->node, &lttng_counter_transport_list);
+}
+
+/**
+ * lttng_counter_transport_unregister - LTTng counter transport unregistration
+ * @transport: transport structure
+ * Called with ust_lock held.
+ */
+void lttng_counter_transport_unregister(struct lttng_counter_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;
+}