aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/sys/common/erl_os_monotonic_time_extender.h
blob: 53c32579d543dbb6d6e6071b7240ecb807ce6974 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
/*
 * %CopyrightBegin%
 * 
 * Copyright Ericsson AB 2015. All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * %CopyrightEnd%
 */

#ifndef ERL_OS_MONOTONIC_TIME_EXTENDER_H__
#define ERL_OS_MONOTONIC_TIME_EXTENDER_H__

#include "sys.h"
#include "erl_threads.h"

typedef struct {
    Uint32 (*raw_os_monotonic_time)(void);
    erts_atomic32_t extend[2];
    int check_interval;
} ErtsOsMonotonicTimeExtendState;

#  define ERTS_EXTEND_OS_MONOTONIC_TIME(S, RT)				\
    ((((ErtsMonotonicTime)						\
       erts_atomic32_read_nob(&((S)->extend[((int) ((RT) >> 31)) & 1]))) \
      << 32)								\
     + (RT))

void
erts_init_os_monotonic_time_extender(ErtsOsMonotonicTimeExtendState *statep,
				     Uint32 (*raw_os_monotonic_time)(void),
				     int check_seconds);
void
erts_late_init_os_monotonic_time_extender(ErtsOsMonotonicTimeExtendState *statep);

#endif