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/*
* The MIT License
*
* Copyright (C) 2013-2016 Alexander Saprykin <saprykin.spb@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* 'Software'), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ptimeprofiler.h"
#include "ptimeprofiler-private.h"
#include <mach/mach_time.h>
static puint64 pp_time_profiler_freq_num = 0;
static puint64 pp_time_profiler_freq_denom = 0;
puint64
p_time_profiler_get_ticks_internal ()
{
puint64 val = mach_absolute_time ();
/* To prevent overflow */
val /= 1000;
val *= pp_time_profiler_freq_num;
val /= pp_time_profiler_freq_denom;
return val;
}
puint64
p_time_profiler_elapsed_usecs_internal (const PTimeProfiler *profiler)
{
return p_time_profiler_get_ticks_internal () - profiler->counter;
}
void
p_time_profiler_init (void)
{
mach_timebase_info_data_t tb;
if (P_UNLIKELY (mach_timebase_info (&tb) != KERN_SUCCESS || tb.denom == 0)) {
P_ERROR ("PTimeProfiler::p_time_profiler_init: mach_timebase_info() failed");
return;
}
pp_time_profiler_freq_num = (puint64) tb.numer;
pp_time_profiler_freq_denom = (puint64) tb.denom;
}
void
p_time_profiler_shutdown (void)
{
pp_time_profiler_freq_num = 0;
pp_time_profiler_freq_denom = 0;
}
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