SoW-2020-0003: Trace Hit Counters

[lttng-tools.git] / include / lttng / map-key.h

diff --git a/include/lttng/map-key.h b/include/lttng/map-key.h
new file mode 100644 (file)
index 0000000..be56948
--- /dev/null
+++ b/include/lttng/map-key.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2021 Francis Deslauriers <francis.deslauriers@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_MAP_KEY_H
+#define LTTNG_MAP_KEY_H
+
+struct lttng_map_key;
+
+enum lttng_map_key_status {
+       LTTNG_MAP_KEY_STATUS_ERROR = -2,
+       LTTNG_MAP_KEY_STATUS_INVALID = -1,
+       LTTNG_MAP_KEY_STATUS_OK = 0,
+};
+
+enum lttng_map_key_token_variable_type {
+       LTTNG_MAP_KEY_TOKEN_VARIABLE_TYPE_EVENT_NAME,
+       LTTNG_MAP_KEY_TOKEN_VARIABLE_TYPE_PROVIDER_NAME,
+};
+
+struct lttng_map_key *lttng_map_key_create(void);
+
+enum lttng_map_key_status lttng_map_key_append_token_variable(
+               struct lttng_map_key *key,
+               enum lttng_map_key_token_variable_type var_type);
+
+enum lttng_map_key_status lttng_map_key_append_token_string(
+               struct lttng_map_key *key, const char *string);
+
+void lttng_map_key_destroy(struct lttng_map_key *key);
+
+#endif /* LTTNG_MAP_KEY_H */