include/lttng/condition/buffer-usage-internal.h

   1 /*
   2  * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_CONDITION_BUFFER_USAGE_INTERNAL_H
   9 #define LTTNG_CONDITION_BUFFER_USAGE_INTERNAL_H
  10
  11 #include <lttng/condition/buffer-usage.h>
  12 #include <lttng/condition/condition-internal.h>
  13 #include <lttng/condition/evaluation-internal.h>
  14 #include <lttng/domain.h>
  15 #include "common/buffer-view.h"
  16 #include <common/macros.h>
  17
  18 struct lttng_condition_buffer_usage {
  19         struct lttng_condition parent;
  20         struct {
  21                 bool set;
  22                 uint64_t value;
  23         } threshold_bytes;
  24         struct {
  25                 bool set;
  26                 double value;
  27         } threshold_ratio;
  28         char *session_name;
  29         char *channel_name;
  30         struct {
  31                 bool set;
  32                 enum lttng_domain_type type;
  33         } domain;
  34 };
  35
  36 struct lttng_condition_buffer_usage_comm {
  37         uint8_t threshold_set_in_bytes;
  38         /*
  39          * Expressed in bytes if "threshold_set_in_bytes" is not 0.
  40          * Otherwise, it is expressed a ratio in the interval [0.0, 1.0]
  41          * that is mapped to the range on a 32-bit unsigned integer.
  42          * The ratio is obtained by (threshold / UINT32_MAX).
  43          */
  44         uint32_t threshold;
  45         /* Both lengths include the trailing \0. */
  46         uint32_t session_name_len;
  47         uint32_t channel_name_len;
  48         /* enum lttng_domain_type */
  49         int8_t domain_type;
  50         /* session and channel names. */
  51         char names[];
  52 } LTTNG_PACKED;
  53
  54 struct lttng_evaluation_buffer_usage {
  55         struct lttng_evaluation parent;
  56         uint64_t buffer_use;
  57         uint64_t buffer_capacity;
  58 };
  59
  60 struct lttng_evaluation_buffer_usage_comm {
  61         uint64_t buffer_use;
  62         uint64_t buffer_capacity;
  63 } LTTNG_PACKED;
  64
  65 LTTNG_HIDDEN
  66 struct lttng_evaluation *lttng_evaluation_buffer_usage_create(
  67                 enum lttng_condition_type type, uint64_t use,
  68                 uint64_t capacity);
  69
  70 LTTNG_HIDDEN
  71 ssize_t lttng_condition_buffer_usage_low_create_from_payload(
  72                 struct lttng_payload_view *view,
  73                 struct lttng_condition **condition);
  74
  75 LTTNG_HIDDEN
  76 ssize_t lttng_condition_buffer_usage_high_create_from_payload(
  77                 struct lttng_payload_view *view,
  78                 struct lttng_condition **condition);
  79
  80 LTTNG_HIDDEN
  81 ssize_t lttng_evaluation_buffer_usage_low_create_from_payload(
  82                 struct lttng_payload_view *view,
  83                 struct lttng_evaluation **evaluation);
  84
  85 LTTNG_HIDDEN
  86 ssize_t lttng_evaluation_buffer_usage_high_create_from_payload(
  87                 struct lttng_payload_view *view,
  88                 struct lttng_evaluation **evaluation);
  89
  90 #endif /* LTTNG_CONDITION_BUFFER_USAGE_INTERNAL_H */