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/*
* %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 {
#ifdef USE_THREADS
Uint32 (*raw_os_monotonic_time)(void);
erts_atomic32_t extend[2];
int check_interval;
#else
Uint32 extend[2];
ErtsMonotonicTime last_msb;
#endif
} ErtsOsMonotonicTimeExtendState;
#ifdef USE_THREADS
# define ERTS_CHK_EXTEND_OS_MONOTONIC_TIME(S, RT) ((void) 1)
# define ERTS_EXTEND_OS_MONOTONIC_TIME(S, RT) \
((((ErtsMonotonicTime) \
erts_atomic32_read_nob(&((S)->extend[((int) ((RT) >> 31)) & 1]))) \
<< 32) \
+ (RT))
#else
# define ERTS_CHK_EXTEND_OS_MONOTONIC_TIME(S, RT) \
do { \
Uint32 msb__ = (RT) & (((Uint32) 1) << 31); \
if (msb__ != (S)->last_msb) { \
int ix__ = ((int) ((S)->last_msb >> 31)) & 1; \
(S)->extend[ix__]++; \
(S)->last_msb = msb; \
} \
} while (0)
# define ERTS_EXTEND_OS_MONOTONIC_TIME(S, RT) \
((((ErtsMonotonicTime) (S)->extend[((int) ((RT) >> 31)) & 1]) << 32) + (RT))
#endif
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
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