src/lib/trace-ir/clock-class.h

   1 #ifndef BABELTRACE_TRACE_IR_CLOCK_CLASS_INTERNAL_H
   2 #define BABELTRACE_TRACE_IR_CLOCK_CLASS_INTERNAL_H
   3
   4 /*
   5  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
   6  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26
  27 #include <babeltrace2/trace-ir/clock-class.h>
  28 #include "lib/object.h"
  29 #include "common/macros.h"
  30 #include "common/common.h"
  31 #include "lib/object-pool.h"
  32 #include "compat/uuid.h"
  33 #include <babeltrace2/types.h>
  34 #include "lib/property.h"
  35 #include "common/assert.h"
  36 #include <stdbool.h>
  37 #include <stdint.h>
  38 #include <glib.h>
  39
  40 #include "lib/func-status.h"
  41
  42 struct bt_clock_class {
  43         struct bt_object base;
  44
  45         struct {
  46                 GString *str;
  47
  48                 /* NULL or `str->str` above */
  49                 const char *value;
  50         } name;
  51
  52         struct {
  53                 GString *str;
  54
  55                 /* NULL or `str->str` above */
  56                 const char *value;
  57         } description;
  58
  59         uint64_t frequency;
  60         uint64_t precision;
  61         int64_t offset_seconds;
  62         uint64_t offset_cycles;
  63
  64         struct {
  65                 uint8_t uuid[BABELTRACE_UUID_LEN];
  66
  67                 /* NULL or `uuid` above */
  68                 bt_uuid value;
  69         } uuid;
  70
  71         bool origin_is_unix_epoch;
  72
  73         /*
  74          * This is computed every time you call
  75          * bt_clock_class_set_frequency() or
  76          * bt_clock_class_set_offset(), as well as initially. It is the
  77          * base offset in nanoseconds including both `offset_seconds`
  78          * and `offset_cycles` above in the result. It is used to
  79          * accelerate future calls to
  80          * bt_clock_snapshot_get_ns_from_origin() and
  81          * bt_clock_class_cycles_to_ns_from_origin().
  82          *
  83          * `overflows` is true if the base offset cannot be computed
  84          * because of an overflow.
  85          */
  86         struct {
  87                 int64_t value_ns;
  88                 bool overflows;
  89         } base_offset;
  90
  91         /* Pool of `struct bt_clock_snapshot *` */
  92         struct bt_object_pool cs_pool;
  93
  94         bool frozen;
  95 };
  96
  97 BT_HIDDEN
  98 void _bt_clock_class_freeze(const struct bt_clock_class *clock_class);
  99
 100 #ifdef BT_DEV_MODE
 101 # define bt_clock_class_freeze          _bt_clock_class_freeze
 102 #else
 103 # define bt_clock_class_freeze(_cc)
 104 #endif
 105
 106 BT_HIDDEN
 107 bt_bool bt_clock_class_is_valid(struct bt_clock_class *clock_class);
 108
 109 static inline
 110 int bt_clock_class_clock_value_from_ns_from_origin(
 111                 struct bt_clock_class *cc, int64_t ns_from_origin,
 112                 uint64_t *raw_value)
 113 {
 114         BT_ASSERT(cc);
 115
 116         return bt_common_clock_value_from_ns_from_origin(cc->offset_seconds,
 117                 cc->offset_cycles, cc->frequency, ns_from_origin,
 118                 raw_value) ? BT_FUNC_STATUS_OVERFLOW : BT_FUNC_STATUS_OK;
 119 }
 120
 121 #endif /* BABELTRACE_TRACE_IR_CLOCK_CLASS_INTERNAL_H */