common: compile libcommon as C++

[lttng-tools.git] / src / common / evaluation.cpp

diff --git a/src/common/evaluation.cpp b/src/common/evaluation.cpp
new file mode 100644 (file)
index 0000000..6b3e634
--- /dev/null
+++ b/src/common/evaluation.cpp
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/evaluation-internal.h>
+#include <lttng/condition/buffer-usage-internal.h>
+#include <lttng/condition/session-consumed-size-internal.h>
+#include <lttng/condition/session-rotation-internal.h>
+#include <lttng/condition/event-rule-matches-internal.h>
+#include <common/macros.h>
+#include <common/error.h>
+#include <stdbool.h>
+
+void lttng_evaluation_init(struct lttng_evaluation *evaluation,
+               enum lttng_condition_type type)
+{
+       evaluation->type = type;
+}
+
+int lttng_evaluation_serialize(const struct lttng_evaluation *evaluation,
+               struct lttng_payload *payload)
+{
+       int ret;
+       struct lttng_evaluation_comm evaluation_comm = {
+               .type = (int8_t) evaluation->type
+       };
+
+       ret = lttng_dynamic_buffer_append(&payload->buffer, &evaluation_comm,
+                       sizeof(evaluation_comm));
+       if (ret) {
+               goto end;
+       }
+
+       if (evaluation->serialize) {
+               ret = evaluation->serialize(evaluation, payload);
+               if (ret) {
+                       goto end;
+               }
+       }
+end:
+       return ret;
+}
+
+ssize_t lttng_evaluation_create_from_payload(
+               const struct lttng_condition *condition,
+               struct lttng_payload_view *src_view,
+               struct lttng_evaluation **evaluation)
+{
+       ssize_t ret, evaluation_size = 0;
+       const struct lttng_evaluation_comm *evaluation_comm;
+       struct lttng_payload_view evaluation_comm_view =
+                       lttng_payload_view_from_view(
+                                       src_view, 0, sizeof(*evaluation_comm));
+       struct lttng_payload_view evaluation_view =
+                       lttng_payload_view_from_view(src_view,
+                                       sizeof(*evaluation_comm), -1);
+
+       if (!src_view || !evaluation) {
+               ret = -1;
+               goto end;
+       }
+
+       if (!lttng_payload_view_is_valid(&evaluation_comm_view)) {
+               ret = -1;
+               goto end;
+       }
+
+       evaluation_comm = (typeof(evaluation_comm)) evaluation_comm_view.buffer.data;
+       evaluation_size += sizeof(*evaluation_comm);
+
+       switch ((enum lttng_condition_type) evaluation_comm->type) {
+       case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+               ret = lttng_evaluation_buffer_usage_low_create_from_payload(
+                               &evaluation_view, evaluation);
+               if (ret < 0) {
+                       goto end;
+               }
+               evaluation_size += ret;
+               break;
+       case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+               ret = lttng_evaluation_buffer_usage_high_create_from_payload(
+                               &evaluation_view, evaluation);
+               if (ret < 0) {
+                       goto end;
+               }
+               evaluation_size += ret;
+               break;
+       case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
+               ret = lttng_evaluation_session_consumed_size_create_from_payload(
+                               &evaluation_view, evaluation);
+               if (ret < 0) {
+                       goto end;
+               }
+               evaluation_size += ret;
+               break;
+       case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
+               ret = lttng_evaluation_session_rotation_ongoing_create_from_payload(
+                               &evaluation_view, evaluation);
+               if (ret < 0) {
+                       goto end;
+               }
+               evaluation_size += ret;
+               break;
+       case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
+               ret = lttng_evaluation_session_rotation_completed_create_from_payload(
+                               &evaluation_view, evaluation);
+               if (ret < 0) {
+                       goto end;
+               }
+               evaluation_size += ret;
+               break;
+       case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES:
+               LTTNG_ASSERT(condition);
+               LTTNG_ASSERT(condition->type ==
+                               LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES);
+               ret = lttng_evaluation_event_rule_matches_create_from_payload(
+                               container_of(condition,
+                                               const struct lttng_condition_event_rule_matches,
+                                               parent),
+                               &evaluation_view, evaluation);
+               if (ret < 0) {
+                       goto end;
+               }
+               evaluation_size += ret;
+               break;
+       default:
+               ERR("Attempted to create evaluation of unknown type (%i)",
+                               (int) evaluation_comm->type);
+               ret = -1;
+               goto end;
+       }
+
+       ret = evaluation_size;
+end:
+       return ret;
+}
+
+enum lttng_condition_type lttng_evaluation_get_type(
+               const struct lttng_evaluation *evaluation)
+{
+       return evaluation ? evaluation->type : LTTNG_CONDITION_TYPE_UNKNOWN;
+}
+
+void lttng_evaluation_destroy(struct lttng_evaluation *evaluation)
+{
+       if (!evaluation) {
+               return;
+       }
+
+       LTTNG_ASSERT(evaluation->destroy);
+       evaluation->destroy(evaluation);
+}