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 <inttypes.h>
  13 #include <babeltrace2/babeltrace.h>
  14 #include "lib/trace-ir/utils.h"
  15
  16 BT_EXPORT
  17 bt_util_clock_cycles_to_ns_from_origin_status
  18 bt_util_clock_cycles_to_ns_from_origin(uint64_t cycles,
  19                 uint64_t frequency, int64_t offset_seconds,
  20                 uint64_t offset_cycles, int64_t *ns)
  21 {
  22         bool overflows;
  23         int64_t base_offset_ns;
  24         bt_util_clock_cycles_to_ns_from_origin_status status =
  25                 BT_FUNC_STATUS_OK;
  26         int ret;
  27
  28         BT_ASSERT_PRE_NO_ERROR();
  29         BT_ASSERT_PRE_NON_NULL("nanoseconds-output", ns,
  30                 "Nanoseconds (output)");
  31         BT_ASSERT_PRE("valid-frequency",
  32                 frequency != UINT64_C(-1) && frequency != 0,
  33                 "Invalid frequency: freq=%" PRIu64, frequency);
  34         BT_ASSERT_PRE("offset-cycles-lt-frequency",
  35                 offset_cycles < frequency,
  36                 "Offset (cycles) is greater than frequency: "
  37                 "offset-cycles=%" PRIu64 ", freq=%" PRIu64,
  38                 offset_cycles, frequency);
  39
  40         overflows = bt_util_get_base_offset_ns(offset_seconds, offset_cycles,
  41                 frequency, &base_offset_ns);
  42         if (overflows) {
  43                 status = BT_FUNC_STATUS_OVERFLOW_ERROR;
  44                 goto end;
  45         }
  46
  47         ret = bt_util_ns_from_origin_inline(base_offset_ns, frequency, cycles, ns);
  48         if (ret) {
  49                 status = BT_FUNC_STATUS_OVERFLOW_ERROR;
  50         }
  51
  52 end:
  53         return status;
  54 }