lib: compile liblttng-ctl as C++

[lttng-tools.git] / src / lib / lttng-ctl / event.cpp

diff --git a/src/lib/lttng-ctl/event.cpp b/src/lib/lttng-ctl/event.cpp
new file mode 100644 (file)
index 0000000..3a6bf22
--- /dev/null
+++ b/src/lib/lttng-ctl/event.cpp
@@ -0,0 +1,197 @@
+/*
+ * 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;
+}