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-pre.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_util_clock_cycles_to_ns_from_origin_status
  19 bt_util_clock_cycles_to_ns_from_origin(uint64_t cycles,
  20                 uint64_t frequency, int64_t offset_seconds,
  21                 uint64_t offset_cycles, int64_t *ns)
  22 {
  23         bool overflows;
  24         int64_t base_offset_ns;
  25         bt_util_clock_cycles_to_ns_from_origin_status status =
  26                 BT_FUNC_STATUS_OK;
  27         int ret;
  28
  29         BT_ASSERT_PRE_NO_ERROR();
  30         BT_ASSERT_PRE_NON_NULL(ns, "Nanoseconds (output)");
  31         BT_ASSERT_PRE(frequency != UINT64_C(-1) && frequency != 0,
  32                 "Invalid frequency: freq=%" PRIu64, frequency);
  33         BT_ASSERT_PRE(offset_cycles < frequency,
  34                 "Offset (cycles) is greater than frequency: "
  35                 "offset-cycles=%" PRIu64 ", freq=%" PRIu64,
  36                 offset_cycles, frequency);
  37
  38         overflows = bt_util_get_base_offset_ns(offset_seconds, offset_cycles,
  39                 frequency, &base_offset_ns);
  40         if (overflows) {
  41                 status = BT_FUNC_STATUS_OVERFLOW_ERROR;
  42                 goto end;
  43         }
  44
  45         ret = bt_util_ns_from_origin_inline(base_offset_ns,
  46                 offset_seconds, offset_cycles,
  47                 frequency, cycles, ns);
  48         if (ret) {
  49                 status = BT_FUNC_STATUS_OVERFLOW_ERROR;
  50         }
  51
  52 end:
  53         return status;
  54 }