common: compile libcommon as C++

[lttng-tools.git] / src / common / actions / notify.cpp

diff --git a/src/common/actions/notify.cpp b/src/common/actions/notify.cpp
new file mode 100644 (file)
index 0000000..e3f837a
--- /dev/null
+++ b/src/common/actions/notify.cpp
@@ -0,0 +1,255 @@
+/*
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <common/error.h>
+#include <common/macros.h>
+#include <common/mi-lttng.h>
+#include <lttng/action/action-internal.h>
+#include <lttng/action/notify-internal.h>
+#include <lttng/action/rate-policy-internal.h>
+#include <lttng/lttng-error.h>
+
+#define IS_NOTIFY_ACTION(action) \
+       (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_NOTIFY)
+
+static struct lttng_action_notify *action_notify_from_action(
+               struct lttng_action *action)
+{
+       LTTNG_ASSERT(action);
+
+       return container_of(action, struct lttng_action_notify, parent);
+}
+
+static const struct lttng_action_notify *action_notify_from_action_const(
+               const struct lttng_action *action)
+{
+       LTTNG_ASSERT(action);
+
+       return container_of(action, struct lttng_action_notify, parent);
+}
+
+static
+void lttng_action_notify_destroy(struct lttng_action *action)
+{
+       struct lttng_action_notify *notify_action;
+       notify_action = action_notify_from_action(action);
+       lttng_rate_policy_destroy(notify_action->policy);
+       free(notify_action);
+}
+
+static
+int lttng_action_notify_serialize(struct lttng_action *action,
+               struct lttng_payload *payload)
+{
+       int ret;
+       struct lttng_action_notify *notify_action;
+
+       if (!action || !IS_NOTIFY_ACTION(action) || !payload) {
+               ret = -1;
+               goto end;
+       }
+
+       DBG("Serializing notify action");
+
+       notify_action = action_notify_from_action(action);
+       DBG("Serializing notify action rate policy");
+       ret = lttng_rate_policy_serialize(notify_action->policy, payload);
+
+end:
+       return ret;
+}
+
+static
+bool lttng_action_notify_is_equal(const struct lttng_action *a,
+               const struct lttng_action *b)
+{
+       const struct lttng_action_notify *_a, *_b;
+
+       _a = action_notify_from_action_const(a);
+       _b = action_notify_from_action_const(b);
+       return lttng_rate_policy_is_equal(_a->policy, _b->policy);
+}
+
+static const struct lttng_rate_policy *
+lttng_action_notify_internal_get_rate_policy(const struct lttng_action *action)
+{
+       const struct lttng_action_notify *_action;
+       _action = action_notify_from_action_const(action);
+
+       return _action->policy;
+}
+
+static enum lttng_error_code lttng_action_notify_mi_serialize(
+               const struct lttng_action *action, struct mi_writer *writer)
+{
+       int ret;
+       enum lttng_action_status status;
+       enum lttng_error_code ret_code;
+       const struct lttng_rate_policy *policy = NULL;
+
+       LTTNG_ASSERT(action);
+       LTTNG_ASSERT(IS_NOTIFY_ACTION(action));
+       LTTNG_ASSERT(writer);
+
+       status = lttng_action_notify_get_rate_policy(action, &policy);
+       LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK);
+       LTTNG_ASSERT(policy != NULL);
+
+       /* Open action notify. */
+       ret = mi_lttng_writer_open_element(
+                       writer, mi_lttng_element_action_notify);
+       if (ret) {
+               goto mi_error;
+       }
+
+       ret_code = lttng_rate_policy_mi_serialize(policy, writer);
+       if (ret_code != LTTNG_OK) {
+               goto end;
+       }
+
+       /* Close action notify element. */
+       ret = mi_lttng_writer_close_element(writer);
+       if (ret) {
+               goto mi_error;
+       }
+
+       ret_code = LTTNG_OK;
+       goto end;
+
+mi_error:
+       ret_code = LTTNG_ERR_MI_IO_FAIL;
+end:
+       return ret_code;
+}
+
+struct lttng_action *lttng_action_notify_create(void)
+{
+       struct lttng_rate_policy *policy = NULL;
+       struct lttng_action_notify *notify = NULL;
+       struct lttng_action *action = NULL;
+
+       notify = (lttng_action_notify *) zmalloc(sizeof(struct lttng_action_notify));
+       if (!notify) {
+               goto end;
+       }
+
+       /* Default policy. */
+       policy = lttng_rate_policy_every_n_create(1);
+       if (!policy) {
+               goto end;
+       }
+
+       lttng_action_init(&notify->parent, LTTNG_ACTION_TYPE_NOTIFY, NULL,
+                       lttng_action_notify_serialize,
+                       lttng_action_notify_is_equal,
+                       lttng_action_notify_destroy,
+                       lttng_action_notify_internal_get_rate_policy,
+                       lttng_action_generic_add_error_query_results,
+                       lttng_action_notify_mi_serialize);
+
+       notify->policy = policy;
+       policy = NULL;
+
+       action = &notify->parent;
+       notify = NULL;
+
+end:
+       free(notify);
+       lttng_rate_policy_destroy(policy);
+       return action;
+}
+
+ssize_t lttng_action_notify_create_from_payload(
+               struct lttng_payload_view *view,
+               struct lttng_action **action)
+{
+       enum lttng_action_status status;
+       ssize_t consumed_length;
+       struct lttng_rate_policy *rate_policy = NULL;
+       struct lttng_action *_action = NULL;
+
+       consumed_length = lttng_rate_policy_create_from_payload(
+                       view, &rate_policy);
+       if (!rate_policy) {
+               consumed_length = -1;
+               goto end;
+       }
+
+       _action = lttng_action_notify_create();
+       if (!_action) {
+               consumed_length = -1;
+               goto end;
+       }
+
+       status = lttng_action_notify_set_rate_policy(_action, rate_policy);
+       if (status != LTTNG_ACTION_STATUS_OK) {
+               consumed_length = -1;
+               goto end;
+       }
+
+       *action = _action;
+       _action = NULL;
+
+end:
+       lttng_rate_policy_destroy(rate_policy);
+       lttng_action_destroy(_action);
+       return consumed_length;
+}
+
+enum lttng_action_status lttng_action_notify_set_rate_policy(
+               struct lttng_action *action,
+               const struct lttng_rate_policy *policy)
+{
+       enum lttng_action_status status;
+       struct lttng_action_notify *notify_action;
+       struct lttng_rate_policy *copy = NULL;
+
+       if (!action || !policy || !IS_NOTIFY_ACTION(action)) {
+               status = LTTNG_ACTION_STATUS_INVALID;
+               goto end;
+       }
+
+       copy = lttng_rate_policy_copy(policy);
+       if (!copy) {
+               status = LTTNG_ACTION_STATUS_ERROR;
+               goto end;
+       }
+
+       notify_action = action_notify_from_action(action);
+
+       /* Free the previous rate policy .*/
+       lttng_rate_policy_destroy(notify_action->policy);
+
+       /* Assign the policy. */
+       notify_action->policy = copy;
+       status = LTTNG_ACTION_STATUS_OK;
+       copy = NULL;
+
+end:
+       lttng_rate_policy_destroy(copy);
+       return status;
+}
+
+enum lttng_action_status lttng_action_notify_get_rate_policy(
+               const struct lttng_action *action,
+               const struct lttng_rate_policy **policy)
+{
+       enum lttng_action_status status;
+       const struct lttng_action_notify *notify_action;
+
+       if (!action || !policy || !IS_NOTIFY_ACTION(action)) {
+               status = LTTNG_ACTION_STATUS_INVALID;
+               goto end;
+       }
+
+       notify_action = action_notify_from_action_const(action);
+
+       *policy = notify_action->policy;
+       status = LTTNG_ACTION_STATUS_OK;
+end:
+       return status;
+}