X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=include%2Flttng%2Fevent-expr-internal.h;fp=include%2Flttng%2Fevent-expr-internal.h;h=8c877818d96f95cb897531f0dc40f2ecf5a4651a;hp=0000000000000000000000000000000000000000;hb=2463b7879c00298daa79744cdaae82ac061a4ed8;hpb=3a4595c2469472dee1656cde5f8882c2123efd3c

diff --git a/include/lttng/event-expr-internal.h b/include/lttng/event-expr-internal.h
new file mode 100644
index 000000000..8c877818d
--- /dev/null
+++ b/include/lttng/event-expr-internal.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2020 Philippe Proulx <pproulx@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_EVENT_EXPR_INTERNAL_H
+#define LTTNG_EVENT_EXPR_INTERNAL_H
+
+#include <assert.h>
+#include <common/macros.h>
+#include <lttng/event-expr.h>
+#include <urcu/ref.h>
+
+struct lttng_event_expr {
+	struct urcu_ref ref;
+	enum lttng_event_expr_type type;
+};
+
+/*
+ * `LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD` and
+ * `LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD`.
+ */
+struct lttng_event_expr_field {
+	struct lttng_event_expr parent;
+	char *name;
+};
+
+/* `LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD` */
+struct lttng_event_expr_app_specific_context_field {
+	struct lttng_event_expr parent;
+	char *provider_name;
+	char *type_name;
+};
+
+/* `LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT` */
+struct lttng_event_expr_array_field_element {
+	struct lttng_event_expr parent;
+
+	/* Owned by this */
+	struct lttng_event_expr *array_field_expr;
+
+	unsigned int index;
+};
+
+/*
+ * Returns whether or not `expr` is an l-value (locator value).
+ */
+static inline
+bool lttng_event_expr_is_lvalue(const struct lttng_event_expr *expr)
+{
+	assert(expr);
+	return expr->type == LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD ||
+			expr->type == LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD ||
+			expr->type == LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD ||
+			expr->type == LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT;
+}
+
+LTTNG_HIDDEN
+void lttng_event_expr_get(struct lttng_event_expr *expr);
+
+LTTNG_HIDDEN
+void lttng_event_expr_put(struct lttng_event_expr *expr);
+
+#endif /* LTTNG_EVENT_EXPR_INTERNAL_H */