bin: compile lttng-sessiond as C++

[lttng-tools.git] / src / bin / lttng-sessiond / condition-internal.cpp

diff --git a/src/bin/lttng-sessiond/condition-internal.cpp b/src/bin/lttng-sessiond/condition-internal.cpp
new file mode 100644 (file)
index 0000000..dd9c244
--- /dev/null
+++ b/src/bin/lttng-sessiond/condition-internal.cpp
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <common/hashtable/utils.h>
+#include <common/hashtable/hashtable.h>
+
+#include <lttng/condition/condition.h>
+#include <lttng/condition/condition-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 <lttng/condition/event-rule-matches.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/condition/event-rule-matches-internal.h>
+#include "condition-internal.h"
+
+static
+unsigned long lttng_condition_buffer_usage_hash(
+       const struct lttng_condition *_condition)
+{
+       unsigned long hash;
+       unsigned long condition_type;
+       struct lttng_condition_buffer_usage *condition;
+
+       condition = container_of(_condition,
+                       struct lttng_condition_buffer_usage, parent);
+
+       condition_type = (unsigned long) condition->parent.type;
+       hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
+       if (condition->session_name) {
+               hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
+       }
+       if (condition->channel_name) {
+               hash ^= hash_key_str(condition->channel_name, lttng_ht_seed);
+       }
+       if (condition->domain.set) {
+               hash ^= hash_key_ulong(
+                               (void *) condition->domain.type,
+                               lttng_ht_seed);
+       }
+       if (condition->threshold_ratio.set) {
+               hash ^= hash_key_u64(&condition->threshold_ratio.value, lttng_ht_seed);
+       } else if (condition->threshold_bytes.set) {
+               uint64_t val;
+
+               val = condition->threshold_bytes.value;
+               hash ^= hash_key_u64(&val, lttng_ht_seed);
+       }
+       return hash;
+}
+
+static
+unsigned long lttng_condition_session_consumed_size_hash(
+       const struct lttng_condition *_condition)
+{
+       unsigned long hash;
+       unsigned long condition_type =
+                       (unsigned long) LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE;
+       struct lttng_condition_session_consumed_size *condition;
+       uint64_t val;
+
+       condition = container_of(_condition,
+                       struct lttng_condition_session_consumed_size, parent);
+
+       hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
+       if (condition->session_name) {
+               hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
+       }
+       val = condition->consumed_threshold_bytes.value;
+       hash ^= hash_key_u64(&val, lttng_ht_seed);
+       return hash;
+}
+
+static
+unsigned long lttng_condition_session_rotation_hash(
+       const struct lttng_condition *_condition)
+{
+       unsigned long hash, condition_type;
+       struct lttng_condition_session_rotation *condition;
+
+       condition = container_of(_condition,
+                       struct lttng_condition_session_rotation, parent);
+       condition_type = (unsigned long) condition->parent.type;
+       hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
+       LTTNG_ASSERT(condition->session_name);
+       hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
+       return hash;
+}
+
+static unsigned long lttng_condition_event_rule_matches_hash(
+               const struct lttng_condition *condition)
+{
+       unsigned long hash, condition_type;
+       enum lttng_condition_status condition_status;
+       const struct lttng_event_rule *event_rule;
+
+       condition_type = (unsigned long) condition->type;
+       condition_status = lttng_condition_event_rule_matches_get_rule(
+                       condition, &event_rule);
+       LTTNG_ASSERT(condition_status == LTTNG_CONDITION_STATUS_OK);
+
+       hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
+       return hash ^ lttng_event_rule_hash(event_rule);
+}
+
+/*
+ * The lttng_condition hashing code is kept in this file (rather than
+ * condition.c) since it makes use of GPLv2 code (hashtable utils), which we
+ * don't want to link in liblttng-ctl.
+ */
+unsigned long lttng_condition_hash(const struct lttng_condition *condition)
+{
+       switch (condition->type) {
+       case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+       case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+               return lttng_condition_buffer_usage_hash(condition);
+       case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
+               return lttng_condition_session_consumed_size_hash(condition);
+       case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
+       case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
+               return lttng_condition_session_rotation_hash(condition);
+       case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES:
+               return lttng_condition_event_rule_matches_hash(condition);
+       default:
+               abort();
+       }
+}
+
+struct lttng_condition *lttng_condition_copy(const struct lttng_condition *condition)
+{
+       int ret;
+       struct lttng_payload copy_buffer;
+       struct lttng_condition *copy = NULL;
+
+       lttng_payload_init(&copy_buffer);
+
+       ret = lttng_condition_serialize(condition, &copy_buffer);
+       if (ret < 0) {
+               goto end;
+       }
+
+       {
+               struct lttng_payload_view view =
+                               lttng_payload_view_from_payload(
+                                               &copy_buffer, 0, -1);
+
+               ret = lttng_condition_create_from_payload(
+                               &view, &copy);
+               if (ret < 0) {
+                       copy = NULL;
+                       goto end;
+               }
+       }
+
+end:
+       lttng_payload_reset(&copy_buffer);
+       return copy;
+}