--- /dev/null
+/*
+ * event.c
+ *
+ * Linux Trace Toolkit Control Library
+ *
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#define _LGPL_SOURCE
+#include <stddef.h>
+
+#include <common/error.h>
+#include <common/sessiond-comm/sessiond-comm.h>
+#include <lttng/event-internal.h>
+#include <lttng/event.h>
+#include <lttng/lttng-error.h>
+#include <lttng/userspace-probe-internal.h>
+
+struct lttng_event *lttng_event_create(void)
+{
+ struct lttng_event *event;
+ struct lttng_event_extended *event_extended;
+
+ event = (lttng_event *) zmalloc(sizeof(*event));
+ if (!event) {
+ PERROR("Error allocating event structure");
+ goto end;
+ }
+
+ event_extended = (lttng_event_extended *) zmalloc(sizeof(*event_extended));
+ if (!event_extended) {
+ PERROR("Error allocating event extended structure");
+ goto error;
+ }
+ event->extended.ptr = event_extended;
+end:
+ return event;
+error:
+ free(event);
+ event = NULL;
+ goto end;
+}
+
+void lttng_event_destroy(struct lttng_event *event)
+{
+ struct lttng_event_extended *event_extended;
+
+ if (!event) {
+ return;
+ }
+
+ event_extended = (struct lttng_event_extended *) event->extended.ptr;
+
+ if (event_extended) {
+ if (event_extended->probe_location) {
+ lttng_userspace_probe_location_destroy(
+ event_extended->probe_location);
+ }
+ free(event_extended);
+ }
+ free(event);
+}
+
+int lttng_event_get_filter_expression(struct lttng_event *event,
+ const char **filter_expression)
+{
+ int ret = 0;
+ struct lttng_event_extended *event_extended;
+
+ if (!event || !filter_expression) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ event_extended = (struct lttng_event_extended *) event->extended.ptr;
+ if (!event_extended) {
+ /*
+ * This can happen since the lttng_event structure is
+ * used for other tasks where this pointer is never set.
+ */
+ *filter_expression = NULL;
+ goto end;
+ }
+
+ *filter_expression = event_extended->filter_expression;
+end:
+ return ret;
+}
+
+int lttng_event_get_exclusion_name_count(struct lttng_event *event)
+{
+ int ret = 0;
+ struct lttng_event_extended *event_extended;
+
+ if (!event) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ event_extended = (struct lttng_event_extended *) event->extended.ptr;
+ if (!event_extended) {
+ /*
+ * This can happen since the lttng_event structure is
+ * used for other tasks where this pointer is never set.
+ */
+ goto end;
+ }
+
+ if (event_extended->exclusions.count > INT_MAX) {
+ ret = -LTTNG_ERR_OVERFLOW;
+ goto end;
+ }
+ ret = (int) event_extended->exclusions.count;
+end:
+ return ret;
+}
+
+int lttng_event_get_exclusion_name(struct lttng_event *event,
+ size_t index, const char **exclusion_name)
+{
+ int ret = 0;
+ struct lttng_event_extended *event_extended;
+
+ if (!event || !exclusion_name) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (index > UINT_MAX) {
+ ret = -LTTNG_ERR_OVERFLOW;
+ goto end;
+ }
+
+ event_extended = (struct lttng_event_extended *) event->extended.ptr;
+ if (!event_extended) {
+ /*
+ * This can happen since the lttng_event structure is
+ * used for other tasks where this pointer is never set.
+ */
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (index >= event_extended->exclusions.count) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ *exclusion_name = event_extended->exclusions.strings +
+ (index * LTTNG_SYMBOL_NAME_LEN);
+end:
+ return ret;
+}
+
+const struct lttng_userspace_probe_location *
+lttng_event_get_userspace_probe_location(const struct lttng_event *event)
+{
+ struct lttng_userspace_probe_location *probe_location = NULL;
+ struct lttng_event_extended *event_extended;
+
+ if (!event) {
+ goto end;
+ }
+
+ event_extended = (struct lttng_event_extended *) event->extended.ptr;
+ if (!event_extended) {
+ goto end;
+ }
+ probe_location = event_extended->probe_location;
+end:
+ return probe_location;
+}
+
+int lttng_event_set_userspace_probe_location(struct lttng_event *event,
+ struct lttng_userspace_probe_location *probe_location)
+{
+ int ret = 0;
+ struct lttng_event_extended *event_extended;
+
+ if (!event || !probe_location) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ event_extended = (struct lttng_event_extended *) event->extended.ptr;
+ LTTNG_ASSERT(event_extended);
+ if (event_extended->probe_location) {
+ lttng_userspace_probe_location_destroy(
+ event_extended->probe_location);
+ }
+ event_extended->probe_location = probe_location;
+end:
+ return ret;
+}