lib/util.c

   1 /*
   2  * Copyright (c) 2015-2018 Philippe Proulx <pproulx@efficios.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #define BT_LOG_TAG "UTIL"
  24 #include <babeltrace/lib-logging-internal.h>
  25
  26 #include <babeltrace/assert-pre-internal.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <string.h>
  30 #include <inttypes.h>
  31 #include <babeltrace/util.h>
  32 #include <babeltrace/trace-ir/utils-internal.h>
  33
  34 bt_util_status bt_util_clock_cycles_to_ns_from_origin(uint64_t cycles,
  35                 uint64_t frequency, int64_t offset_seconds,
  36                 uint64_t offset_cycles, int64_t *ns)
  37 {
  38         bool overflows;
  39         int64_t base_offset_ns;
  40         bt_util_status status = BT_UTIL_STATUS_OK;
  41         int ret;
  42
  43         BT_ASSERT_PRE_NON_NULL(ns, "Nanoseconds (output)");
  44         BT_ASSERT_PRE(frequency != UINT64_C(-1) && frequency != 0,
  45                 "Invalid frequency: freq=%" PRIu64, frequency);
  46         BT_ASSERT_PRE(offset_cycles < frequency,
  47                 "Offset (cycles) is greater than frequency: "
  48                 "offset-cycles=%" PRIu64 ", freq=%" PRIu64,
  49                 offset_cycles, frequency);
  50
  51         overflows = bt_util_get_base_offset_ns(offset_seconds, offset_cycles,
  52                 frequency, &base_offset_ns);
  53         if (overflows) {
  54                 status = BT_UTIL_STATUS_OVERFLOW;
  55                 goto end;
  56         }
  57
  58         ret = bt_util_ns_from_origin_inline(base_offset_ns,
  59                 offset_seconds, offset_cycles,
  60                 frequency, cycles, ns);
  61         if (ret) {
  62                 status = BT_UTIL_STATUS_OVERFLOW;
  63         }
  64
  65 end:
  66         return status;
  67 }