1 /*
2  * Copyright (C) 2015 Intel Corporation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "Utils.hpp"
18 
get_timestamp(clockid_t clock_id)19 static int64_t get_timestamp(clockid_t clock_id)
20 {
21   struct timespec ts = {0, 0};
22 
23   if (!clock_gettime(clock_id, &ts))
24     return 1000000000LL * ts.tv_sec + ts.tv_nsec;
25   else  /* in this case errno is set appropriately */
26     return -1;
27 }
28 
get_timestamp_monotonic()29 int64_t get_timestamp_monotonic()
30 {
31   return get_timestamp(CLOCK_MONOTONIC);
32 }
33 
set_timestamp(struct timespec * out,int64_t target_ns)34 void set_timestamp(struct timespec *out, int64_t target_ns)
35 {
36   out->tv_sec  = target_ns / 1000000000LL;
37   out->tv_nsec = target_ns % 1000000000LL;
38 }
39