Add client notification API

[lttng-tools.git] / include / lttng / condition / buffer-usage-internal.h

diff --git a/include/lttng/condition/buffer-usage-internal.h b/include/lttng/condition/buffer-usage-internal.h
new file mode 100644 (file)
index 0000000..4b605d6
--- /dev/null
+++ b/include/lttng/condition/buffer-usage-internal.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License, version 2.1 only,
+ * as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef LTTNG_CONDITION_BUFFER_USAGE_INTERNAL_H
+#define LTTNG_CONDITION_BUFFER_USAGE_INTERNAL_H
+
+#include <lttng/condition/buffer-usage.h>
+#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/evaluation-internal.h>
+#include <lttng/domain.h>
+#include "common/buffer-view.h"
+
+struct lttng_condition_buffer_usage {
+       struct lttng_condition parent;
+       struct {
+               bool set;
+               uint64_t value;
+       } threshold_bytes;
+       struct {
+               bool set;
+               double value;
+       } threshold_ratio;
+       char *session_name;
+       char *channel_name;
+       struct {
+               bool set;
+               enum lttng_domain_type type;
+       } domain;
+};
+
+struct lttng_condition_buffer_usage_comm {
+       uint8_t threshold_set_in_bytes;
+       /*
+        * Expressed in bytes if "threshold_set_in_bytes" is not 0.
+        * Otherwise, it is expressed a ratio in the interval [0.0, 1.0]
+        * that is mapped to the range on a 32-bit unsigned integer.
+        * The ratio is obtained by (threshold / UINT32_MAX).
+        */
+       uint32_t threshold;
+       /* Both lengths include the trailing \0. */
+       uint32_t session_name_len;
+       uint32_t channel_name_len;
+       /* enum lttng_domain_type */
+       int8_t domain_type;
+       /* session and channel names. */
+       char names[];
+} LTTNG_PACKED;
+
+struct lttng_evaluation_buffer_usage {
+       struct lttng_evaluation parent;
+       uint64_t buffer_use;
+       uint64_t buffer_capacity;
+};
+
+struct lttng_evaluation_buffer_usage_comm {
+       uint64_t buffer_use;
+       uint64_t buffer_capacity;
+} LTTNG_PACKED;
+
+LTTNG_HIDDEN
+struct lttng_evaluation *lttng_evaluation_buffer_usage_create(
+               enum lttng_condition_type type, uint64_t use,
+               uint64_t capacity);
+
+LTTNG_HIDDEN
+ssize_t lttng_condition_buffer_usage_low_create_from_buffer(
+               const struct lttng_buffer_view *view,
+               struct lttng_condition **condition);
+
+LTTNG_HIDDEN
+ssize_t lttng_condition_buffer_usage_high_create_from_buffer(
+               const struct lttng_buffer_view *view,
+               struct lttng_condition **condition);
+
+LTTNG_HIDDEN
+ssize_t lttng_evaluation_buffer_usage_low_create_from_buffer(
+               const struct lttng_buffer_view *view,
+               struct lttng_evaluation **evaluation);
+
+LTTNG_HIDDEN
+ssize_t lttng_evaluation_buffer_usage_high_create_from_buffer(
+               const struct lttng_buffer_view *view,
+               struct lttng_evaluation **evaluation);
+
+#endif /* LTTNG_CONDITION_BUFFER_USAGE_INTERNAL_H */