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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2005-2009. 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%
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "sys.h"
#include "global.h"
/******************* Routines for time measurement *********************/
int erts_ticks_per_sec = 0; /* Will be SYS_CLK_TCK in erl_unix_sys.h */
int sys_init_time(void)
{
return SYS_CLOCK_RESOLUTION;
}
clock_t sys_times(SysTimes *now) {
now->tms_utime = now->tms_stime = now->tms_cutime = now->tms_cstime = 0;
return 0;
}
static OSTICK last_tick_count = 0;
static SysHrTime wrap = 0;
static OSTICK us_per_tick;
void sys_init_hrtime() {
us_per_tick = system_tick();
}
SysHrTime sys_gethrtime() {
OSTICK ticks = get_ticks();
if (ticks < (SysHrTime) last_tick_count) {
wrap += 1ULL << 32;
}
last_tick_count = ticks;
return ((((SysHrTime) ticks) + wrap) * 1000*us_per_tick);
}
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