src/lib/util.c

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (c) 2015-2018 Philippe Proulx <pproulx@efficios.com>
   5  */
   6
   7 #define BT_LOG_TAG "LIB/UTIL"
   8 #include "lib/logging.h"
   9
  10 #include "lib/assert-cond.h"
  11 #include <stdbool.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <inttypes.h>
  15 #include <babeltrace2/babeltrace.h>
  16 #include "lib/trace-ir/utils.h"
  17
  18 BT_EXPORT
  19 bt_util_clock_cycles_to_ns_from_origin_status
  20 bt_util_clock_cycles_to_ns_from_origin(uint64_t cycles,
  21                 uint64_t frequency, int64_t offset_seconds,
  22                 uint64_t offset_cycles, int64_t *ns)
  23 {
  24         bool overflows;
  25         int64_t base_offset_ns;
  26         bt_util_clock_cycles_to_ns_from_origin_status status =
  27                 BT_FUNC_STATUS_OK;
  28         int ret;
  29
  30         BT_ASSERT_PRE_NO_ERROR();
  31         BT_ASSERT_PRE_NON_NULL("nanoseconds-output", ns,
  32                 "Nanoseconds (output)");
  33         BT_ASSERT_PRE("valid-frequency",
  34                 frequency != UINT64_C(-1) && frequency != 0,
  35                 "Invalid frequency: freq=%" PRIu64, frequency);
  36         BT_ASSERT_PRE("offset-cycles-lt-frequency",
  37                 offset_cycles < frequency,
  38                 "Offset (cycles) is greater than frequency: "
  39                 "offset-cycles=%" PRIu64 ", freq=%" PRIu64,
  40                 offset_cycles, frequency);
  41
  42         overflows = bt_util_get_base_offset_ns(offset_seconds, offset_cycles,
  43                 frequency, &base_offset_ns);
  44         if (overflows) {
  45                 status = BT_FUNC_STATUS_OVERFLOW_ERROR;
  46                 goto end;
  47         }
  48
  49         ret = bt_util_ns_from_origin_inline(base_offset_ns,
  50                 offset_seconds, offset_cycles,
  51                 frequency, cycles, ns);
  52         if (ret) {
  53                 status = BT_FUNC_STATUS_OVERFLOW_ERROR;
  54         }
  55
  56 end:
  57         return status;
  58 }