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/*
* The MIT License
*
* Copyright (C) 2017 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"
#define INCL_DOSPROFILE
#define INCL_DOSERRORS
#include <os2.h>
#if PLIBSYS_HAS_LLDIV
# ifdef P_CC_GNU
# define __USE_ISOC99
# endif
# include <stdlib.h>
#endif
static puint64 pp_time_profiler_freq = 1;
puint64
p_time_profiler_get_ticks_internal ()
{
union {
puint64 ticks;
QWORD tcounter;
} tick_time;
if (P_UNLIKELY (DosTmrQueryTime (&tick_time.tcounter) != NO_ERROR)) {
P_ERROR ("PTimeProfiler::p_time_profiler_get_ticks_internal: DosTmrQueryTime() failed");
return 0;
}
return tick_time.ticks;
}
puint64
p_time_profiler_elapsed_usecs_internal (const PTimeProfiler *profiler)
{
puint64 ticks;
#if PLIBSYS_HAS_LLDIV
lldiv_t ldres;
#endif
puint64 quot;
puint64 rem;
ticks = p_time_profiler_get_ticks_internal ();
if (ticks < profiler->counter) {
P_WARNING ("PTimeProfiler::p_time_profiler_elapsed_usecs_internal: negative jitter");
return 1;
}
ticks -= profiler->counter;
#if PLIBSYS_HAS_LLDIV
ldres = lldiv ((long long) ticks, (long long) pp_time_profiler_freq);
quot = ldres.quot;
rem = ldres.rem;
#else
quot = ticks / pp_time_profiler_freq;
rem = ticks % pp_time_profiler_freq;
#endif
return (puint64) (quot * 1000000LL + (rem * 1000000LL) / pp_time_profiler_freq);
}
void
p_time_profiler_init (void)
{
ULONG freq;
if (P_UNLIKELY (DosTmrQueryFreq (&freq) != NO_ERROR)) {
P_ERROR ("PTimeProfiler::p_time_profiler_init: DosTmrQueryFreq() failed");
return;
}
pp_time_profiler_freq = (puint64) freq;
}
void
p_time_profiler_shutdown (void)
{
pp_time_profiler_freq = 1;
}
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