Move notification API code to libcommon

[lttng-tools.git] / src / common / trigger.c

diff --git a/src/common/trigger.c b/src/common/trigger.c
new file mode 100644 (file)
index 0000000..1d79a61
--- /dev/null
+++ b/src/common/trigger.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License, version 2.1 only,
+ * as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <lttng/trigger/trigger-internal.h>
+#include <lttng/condition/condition-internal.h>
+#include <lttng/action/action-internal.h>
+#include <assert.h>
+
+LTTNG_HIDDEN
+bool lttng_trigger_validate(struct lttng_trigger *trigger)
+{
+       bool valid;
+
+       if (!trigger) {
+               valid = false;
+               goto end;
+       }
+
+       valid = lttng_condition_validate(trigger->condition) &&
+                       lttng_action_validate(trigger->action);
+end:
+       return valid;
+}
+
+struct lttng_trigger *lttng_trigger_create(
+               struct lttng_condition *condition,
+               struct lttng_action *action)
+{
+       struct lttng_trigger *trigger = NULL;
+
+       if (!condition || !action) {
+               goto end;
+       }
+
+       trigger = zmalloc(sizeof(struct lttng_trigger));
+       if (!trigger) {
+               goto end;
+       }
+
+       trigger->condition = condition;
+       trigger->action = action;
+end:
+       return trigger;
+}
+
+void lttng_trigger_destroy(struct lttng_trigger *trigger)
+{
+       if (!trigger) {
+               return;
+       }
+
+       lttng_condition_destroy(trigger->condition);
+       lttng_action_destroy(trigger->action);
+       free(trigger);
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_trigger_create_from_buffer(const char *buf,
+               struct lttng_trigger **trigger)
+{
+       ssize_t ret, trigger_size;
+       struct lttng_condition *condition = NULL;
+       struct lttng_action *action = NULL;
+
+       if (!buf || !trigger) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = lttng_condition_create_from_buffer(buf, &condition);
+       if (ret < 0) {
+               goto end;
+       }
+
+       trigger_size = ret;
+       buf += ret;
+       ret = lttng_action_create_from_buffer(buf, &action);
+       if (ret < 0) {
+               goto end;
+       }
+
+       trigger_size += ret;
+       *trigger = lttng_trigger_create(condition, action);
+       if (!*trigger) {
+               goto error;
+       }
+       ret = trigger_size;
+end:
+       return ret;
+error:
+       lttng_condition_destroy(condition);
+       lttng_action_destroy(action);
+       return ret;
+}
+
+/*
+ * Returns the size of a trigger's condition and action.
+ * Both elements are stored contiguously, see their "*_comm" structure
+ * for the detailed format.
+ */
+LTTNG_HIDDEN
+ssize_t lttng_trigger_serialize(struct lttng_trigger *trigger, char *buf)
+{
+       ssize_t action_size, condition_size, ret;
+
+       if (!trigger) {
+               ret = -1;
+               goto end;
+       }
+
+       condition_size = lttng_condition_serialize(trigger->condition, NULL);
+       if (condition_size < 0) {
+               ret = -1;
+               goto end;
+       }
+
+       action_size = lttng_action_serialize(trigger->action, NULL);
+       if (action_size < 0) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = action_size + condition_size;
+       if (!buf) {
+               goto end;
+       }
+
+       condition_size = lttng_condition_serialize(trigger->condition, buf);
+       if (condition_size < 0) {
+               ret = -1;
+               goto end;
+       }
+
+       buf += condition_size;
+       action_size = lttng_action_serialize(trigger->action, buf);
+       if (action_size < 0) {
+               ret = -1;
+               goto end;
+       }
+end:
+       return ret;
+}