Implement libcounter

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

diff --git a/liblttng-ust/lttng-events.c b/liblttng-ust/lttng-events.c
index 66ec7b2ca7862715ca3295a179462266eaad4493..6a089122c8d1a2afee87f1a77e353aa4d7467736 100644 (file)
--- a/liblttng-ust/lttng-events.c
+++ b/liblttng-ust/lttng-events.c
@@ -67,6 +67,7 @@
 #include "ust-events-internal.h"
 #include "wait.h"
 #include "../libringbuffer/shm.h"
+#include "../libcounter/counter.h"
 #include "jhash.h"
 #include <lttng/ust-abi.h>
 
@@ -171,6 +172,46 @@ struct lttng_session *lttng_session_create(void)
        return session;
 }
 
+struct lttng_counter *lttng_ust_counter_create(
+               const char *counter_transport_name,
+               size_t number_dimensions, const struct lttng_counter_dimension *dimensions)
+{
+       struct lttng_counter_transport *counter_transport = NULL;
+       struct lttng_counter *counter = NULL;
+
+       counter_transport = lttng_counter_transport_find(counter_transport_name);
+       if (!counter_transport)
+               goto notransport;
+       counter = zmalloc(sizeof(struct lttng_counter));
+       if (!counter)
+               goto nomem;
+
+       counter->ops = &counter_transport->ops;
+       counter->transport = counter_transport;
+
+       counter->counter = counter->ops->counter_create(
+                       number_dimensions, dimensions, 0,
+                       -1, 0, NULL, false);
+       if (!counter->counter) {
+               goto create_error;
+       }
+
+       return counter;
+
+create_error:
+       free(counter);
+nomem:
+notransport:
+       return NULL;
+}
+
+static
+void lttng_ust_counter_destroy(struct lttng_counter *counter)
+{
+       counter->ops->counter_destroy(counter->counter);
+       free(counter);
+}
+
 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void)
 {
        struct lttng_event_notifier_group *event_notifier_group;
@@ -352,7 +393,10 @@ void lttng_event_notifier_group_destroy(
                        &event_notifier_group->event_notifiers_head, node)
                _lttng_event_notifier_destroy(notifier);
 
-       /* Close the notification fd to the listener of event notifiers. */
+       if (event_notifier_group->error_counter)
+               lttng_ust_counter_destroy(event_notifier_group->error_counter);
+
+       /* Close the notification fd to the listener of event_notifiers. */
 
        lttng_ust_lock_fd_tracker();
        close_ret = close(event_notifier_group->notification_fd);