1 /*
2  * %CopyrightBegin%
3  *
4  * Copyright Ericsson AB 2015-2018. All Rights Reserved.
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *
18  * %CopyrightEnd%
19  */
20 
21 #ifndef ERL_OS_MONOTONIC_TIME_EXTENDER_H__
22 #define ERL_OS_MONOTONIC_TIME_EXTENDER_H__
23 
24 #include "sys.h"
25 #include "erl_threads.h"
26 
27 typedef struct {
28     Uint32 (*raw_os_monotonic_time)(void);
29     erts_atomic32_t extend[2];
30     int check_interval;
31 } ErtsOsMonotonicTimeExtendState;
32 
33 #  define ERTS_EXTEND_OS_MONOTONIC_TIME(S, RT)				\
34     ((((ErtsMonotonicTime)						\
35        erts_atomic32_read_nob(&((S)->extend[((int) ((RT) >> 31)) & 1]))) \
36       << 32)								\
37      + (RT))
38 
39 void
40 erts_init_os_monotonic_time_extender(ErtsOsMonotonicTimeExtendState *statep,
41 				     Uint32 (*raw_os_monotonic_time)(void),
42 				     int check_seconds);
43 void
44 erts_late_init_os_monotonic_time_extender(ErtsOsMonotonicTimeExtendState *statep);
45 
46 #endif
47