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

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
   5  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   6  */
   7
   8 #define BT_LOG_TAG "LIB/CLOCK-CLASS"
   9 #include "lib/logging.h"
  10
  11 #include "lib/assert-cond.h"
  12 #include "common/uuid.h"
  13 #include <babeltrace2/trace-ir/clock-class.h>
  14 #include "clock-class.h"
  15 #include "clock-snapshot.h"
  16 #include "utils.h"
  17 #include "compat/compiler.h"
  18 #include <babeltrace2/types.h>
  19 #include "compat/string.h"
  20 #include <inttypes.h>
  21 #include <stdbool.h>
  22 #include "lib/object.h"
  23 #include "common/assert.h"
  24 #include "lib/func-status.h"
  25 #include "lib/value.h"
  26
  27 #define BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(_cc) \
  28         BT_ASSERT_PRE_DEV_HOT((_cc), "Clock class", ": %!+K", (_cc))
  29
  30 static
  31 void destroy_clock_class(struct bt_object *obj)
  32 {
  33         struct bt_clock_class *clock_class = (void *) obj;
  34
  35         BT_LIB_LOGD("Destroying clock class: %!+K", clock_class);
  36         BT_OBJECT_PUT_REF_AND_RESET(clock_class->user_attributes);
  37
  38         if (clock_class->name.str) {
  39                 g_string_free(clock_class->name.str, TRUE);
  40                 clock_class->name.str = NULL;
  41                 clock_class->name.value = NULL;
  42         }
  43
  44         if (clock_class->description.str) {
  45                 g_string_free(clock_class->description.str, TRUE);
  46                 clock_class->description.str = NULL;
  47                 clock_class->description.value = NULL;
  48         }
  49
  50         bt_object_pool_finalize(&clock_class->cs_pool);
  51         g_free(clock_class);
  52 }
  53
  54 static
  55 void free_clock_snapshot(struct bt_clock_snapshot *clock_snapshot,
  56                 struct bt_clock_class *clock_class)
  57 {
  58         bt_clock_snapshot_destroy(clock_snapshot);
  59 }
  60
  61 static inline
  62 void set_base_offset(struct bt_clock_class *clock_class)
  63 {
  64         clock_class->base_offset.overflows = bt_util_get_base_offset_ns(
  65                 clock_class->offset_seconds, clock_class->offset_cycles,
  66                 clock_class->frequency, &clock_class->base_offset.value_ns);
  67 }
  68
  69 struct bt_clock_class *bt_clock_class_create(bt_self_component *self_comp)
  70 {
  71         int ret;
  72         struct bt_clock_class *clock_class = NULL;
  73
  74         BT_ASSERT_PRE_NO_ERROR();
  75         BT_ASSERT_PRE_NON_NULL(self_comp, "Self component");
  76         BT_LOGD_STR("Creating default clock class object");
  77
  78         clock_class = g_new0(struct bt_clock_class, 1);
  79         if (!clock_class) {
  80                 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one clock class.");
  81                 goto error;
  82         }
  83
  84         bt_object_init_shared(&clock_class->base, destroy_clock_class);
  85
  86         clock_class->user_attributes = bt_value_map_create();
  87         if (!clock_class->user_attributes) {
  88                 BT_LIB_LOGE_APPEND_CAUSE(
  89                         "Failed to create a map value object.");
  90                 goto error;
  91         }
  92
  93         clock_class->name.str = g_string_new(NULL);
  94         if (!clock_class->name.str) {
  95                 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate a GString.");
  96                 goto error;
  97         }
  98
  99         clock_class->description.str = g_string_new(NULL);
 100         if (!clock_class->description.str) {
 101                 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate a GString.");
 102                 goto error;
 103         }
 104
 105         clock_class->frequency = UINT64_C(1000000000);
 106         clock_class->origin_is_unix_epoch = BT_TRUE;
 107         set_base_offset(clock_class);
 108         ret = bt_object_pool_initialize(&clock_class->cs_pool,
 109                 (bt_object_pool_new_object_func) bt_clock_snapshot_new,
 110                 (bt_object_pool_destroy_object_func)
 111                         free_clock_snapshot,
 112                 clock_class);
 113         if (ret) {
 114                 BT_LIB_LOGE_APPEND_CAUSE(
 115                         "Failed to initialize clock snapshot pool: ret=%d",
 116                         ret);
 117                 goto error;
 118         }
 119
 120         BT_LIB_LOGD("Created clock class object: %!+K", clock_class);
 121         goto end;
 122
 123 error:
 124         BT_OBJECT_PUT_REF_AND_RESET(clock_class);
 125
 126 end:
 127         return clock_class;
 128 }
 129
 130 const char *bt_clock_class_get_name(const struct bt_clock_class *clock_class)
 131 {
 132         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 133         return clock_class->name.value;
 134 }
 135
 136 enum bt_clock_class_set_name_status bt_clock_class_set_name(
 137                 struct bt_clock_class *clock_class, const char *name)
 138 {
 139         BT_ASSERT_PRE_NO_ERROR();
 140         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 141         BT_ASSERT_PRE_NON_NULL(name, "Name");
 142         BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(clock_class);
 143         g_string_assign(clock_class->name.str, name);
 144         clock_class->name.value = clock_class->name.str->str;
 145         BT_LIB_LOGD("Set clock class's name: %!+K", clock_class);
 146         return BT_FUNC_STATUS_OK;
 147 }
 148
 149 const char *bt_clock_class_get_description(
 150                 const struct bt_clock_class *clock_class)
 151 {
 152         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 153         return clock_class->description.value;
 154 }
 155
 156 enum bt_clock_class_set_description_status bt_clock_class_set_description(
 157                 struct bt_clock_class *clock_class, const char *descr)
 158 {
 159         BT_ASSERT_PRE_NO_ERROR();
 160         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 161         BT_ASSERT_PRE_NON_NULL(descr, "Description");
 162         BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(clock_class);
 163         g_string_assign(clock_class->description.str, descr);
 164         clock_class->description.value = clock_class->description.str->str;
 165         BT_LIB_LOGD("Set clock class's description: %!+K",
 166                 clock_class);
 167         return BT_FUNC_STATUS_OK;
 168 }
 169
 170 uint64_t bt_clock_class_get_frequency(const struct bt_clock_class *clock_class)
 171 {
 172         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 173         return clock_class->frequency;
 174 }
 175
 176 void bt_clock_class_set_frequency(struct bt_clock_class *clock_class,
 177                 uint64_t frequency)
 178 {
 179         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 180         BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(clock_class);
 181         BT_ASSERT_PRE(frequency != UINT64_C(-1) && frequency != 0,
 182                 "Invalid frequency: %![cc-]+K, new-freq=%" PRIu64,
 183                 clock_class, frequency);
 184         BT_ASSERT_PRE(clock_class->offset_cycles < frequency,
 185                 "Offset (cycles) is greater than clock class's frequency: "
 186                 "%![cc-]+K, new-freq=%" PRIu64, clock_class, frequency);
 187         clock_class->frequency = frequency;
 188         set_base_offset(clock_class);
 189         BT_LIB_LOGD("Set clock class's frequency: %!+K", clock_class);
 190 }
 191
 192 uint64_t bt_clock_class_get_precision(const struct bt_clock_class *clock_class)
 193 {
 194         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 195         return clock_class->precision;
 196 }
 197
 198 void bt_clock_class_set_precision(struct bt_clock_class *clock_class,
 199                 uint64_t precision)
 200 {
 201         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 202         BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(clock_class);
 203         BT_ASSERT_PRE(precision != UINT64_C(-1),
 204                 "Invalid precision: %![cc-]+K, new-precision=%" PRIu64,
 205                 clock_class, precision);
 206         clock_class->precision = precision;
 207         BT_LIB_LOGD("Set clock class's precision: %!+K", clock_class);
 208 }
 209
 210 void bt_clock_class_get_offset(const struct bt_clock_class *clock_class,
 211                 int64_t *seconds, uint64_t *cycles)
 212 {
 213         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 214         BT_ASSERT_PRE_DEV_NON_NULL(seconds, "Seconds (output)");
 215         BT_ASSERT_PRE_DEV_NON_NULL(cycles, "Cycles (output)");
 216         *seconds = clock_class->offset_seconds;
 217         *cycles = clock_class->offset_cycles;
 218 }
 219
 220 void bt_clock_class_set_offset(struct bt_clock_class *clock_class,
 221                 int64_t seconds, uint64_t cycles)
 222 {
 223         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 224         BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(clock_class);
 225         BT_ASSERT_PRE(cycles < clock_class->frequency,
 226                 "Offset (cycles) is greater than clock class's frequency: "
 227                 "%![cc-]+K, new-offset-cycles=%" PRIu64, clock_class, cycles);
 228         clock_class->offset_seconds = seconds;
 229         clock_class->offset_cycles = cycles;
 230         set_base_offset(clock_class);
 231         BT_LIB_LOGD("Set clock class's offset: %!+K", clock_class);
 232 }
 233
 234 bt_bool bt_clock_class_origin_is_unix_epoch(const struct bt_clock_class *clock_class)
 235 {
 236         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 237         return (bool) clock_class->origin_is_unix_epoch;
 238 }
 239
 240 void bt_clock_class_set_origin_is_unix_epoch(struct bt_clock_class *clock_class,
 241                 bt_bool origin_is_unix_epoch)
 242 {
 243         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 244         BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(clock_class);
 245         clock_class->origin_is_unix_epoch = (bool) origin_is_unix_epoch;
 246         BT_LIB_LOGD("Set clock class's origin is Unix epoch property: %!+K",
 247                 clock_class);
 248 }
 249
 250 bt_uuid bt_clock_class_get_uuid(const struct bt_clock_class *clock_class)
 251 {
 252         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 253         return clock_class->uuid.value;
 254 }
 255
 256 void bt_clock_class_set_uuid(struct bt_clock_class *clock_class,
 257                 bt_uuid uuid)
 258 {
 259         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 260         BT_ASSERT_PRE_NON_NULL(uuid, "UUID");
 261         BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(clock_class);
 262         bt_uuid_copy(clock_class->uuid.uuid, uuid);
 263         clock_class->uuid.value = clock_class->uuid.uuid;
 264         BT_LIB_LOGD("Set clock class's UUID: %!+K", clock_class);
 265 }
 266
 267 BT_HIDDEN
 268 void _bt_clock_class_freeze(const struct bt_clock_class *clock_class)
 269 {
 270         BT_ASSERT(clock_class);
 271
 272         if (clock_class->frozen) {
 273                 return;
 274         }
 275
 276         BT_LIB_LOGD("Freezing clock class's user attributes: %!+v",
 277                 clock_class->user_attributes);
 278         bt_value_freeze(clock_class->user_attributes);
 279         BT_LIB_LOGD("Freezing clock class: %!+K", clock_class);
 280         ((struct bt_clock_class *) clock_class)->frozen = 1;
 281 }
 282
 283 enum bt_clock_class_cycles_to_ns_from_origin_status
 284 bt_clock_class_cycles_to_ns_from_origin(
 285                 const struct bt_clock_class *clock_class,
 286                 uint64_t cycles, int64_t *ns)
 287 {
 288         int ret;
 289
 290         BT_ASSERT_PRE_DEV_NO_ERROR();
 291         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 292         BT_ASSERT_PRE_DEV_NON_NULL(ns, "Nanoseconds (output)");
 293         ret = bt_util_ns_from_origin_clock_class(clock_class, cycles, ns);
 294         if (ret) {
 295                 BT_LIB_LOGE_APPEND_CAUSE("Cannot convert cycles to nanoseconds "
 296                         "from origin for given clock class: "
 297                         "value overflows the signed 64-bit integer range: "
 298                         "%![cc-]+K, cycles=%" PRIu64,
 299                         clock_class, cycles);
 300                 ret = BT_FUNC_STATUS_OVERFLOW_ERROR;
 301         }
 302
 303         return ret;
 304 }
 305
 306 const struct bt_value *bt_clock_class_borrow_user_attributes_const(
 307                 const struct bt_clock_class *clock_class)
 308 {
 309         BT_ASSERT_PRE_DEV_NON_NULL(clock_class, "Clock class");
 310         return clock_class->user_attributes;
 311 }
 312
 313 struct bt_value *bt_clock_class_borrow_user_attributes(
 314                 struct bt_clock_class *clock_class)
 315 {
 316         return (void *) bt_clock_class_borrow_user_attributes_const(
 317                 (void *) clock_class);
 318 }
 319
 320 void bt_clock_class_set_user_attributes(
 321                 struct bt_clock_class *clock_class,
 322                 const struct bt_value *user_attributes)
 323 {
 324         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 325         BT_ASSERT_PRE_NON_NULL(user_attributes, "User attributes");
 326         BT_ASSERT_PRE(user_attributes->type == BT_VALUE_TYPE_MAP,
 327                 "User attributes object is not a map value object.");
 328         BT_ASSERT_PRE_DEV_CLOCK_CLASS_HOT(clock_class);
 329         bt_object_put_ref_no_null_check(clock_class->user_attributes);
 330         clock_class->user_attributes = (void *) user_attributes;
 331         bt_object_get_ref_no_null_check(clock_class->user_attributes);
 332 }
 333
 334 void bt_clock_class_get_ref(const struct bt_clock_class *clock_class)
 335 {
 336         bt_object_get_ref(clock_class);
 337 }
 338
 339 void bt_clock_class_put_ref(const struct bt_clock_class *clock_class)
 340 {
 341         bt_object_put_ref(clock_class);
 342 }