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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 <unistd.h>
#include <time.h>
#include <sys/time.h>
#ifndef _POSIX_MONOTONIC_CLOCK
# define _POSIX_MONOTONIC_CLOCK (-1)
#endif
typedef puint64 (* PPOSIXTicksFunc) (void);
static PPOSIXTicksFunc pp_time_profiler_ticks_func = NULL;
#if (_POSIX_MONOTONIC_CLOCK >= 0) || defined (P_OS_IRIX)
static puint64 pp_time_profiler_get_ticks_clock ();
#endif
static puint64 pp_time_profiler_get_ticks_gtod ();
#if (_POSIX_MONOTONIC_CLOCK >= 0) || defined (P_OS_IRIX)
static puint64
pp_time_profiler_get_ticks_clock ()
{
struct timespec ts;
#ifdef P_OS_IRIX
if (P_UNLIKELY (clock_gettime (CLOCK_SGI_CYCLE, &ts) != 0)) {
#else
if (P_UNLIKELY (clock_gettime (CLOCK_MONOTONIC, &ts) != 0)) {
#endif
P_ERROR ("PTimeProfiler::pp_time_profiler_get_ticks_clock: clock_gettime() failed");
return pp_time_profiler_get_ticks_gtod ();
} else
return (puint64) (ts.tv_sec * 1000000 + ts.tv_nsec / 1000);
}
#endif
static puint64
pp_time_profiler_get_ticks_gtod ()
{
struct timeval tv;
if (P_UNLIKELY (gettimeofday (&tv, NULL) != 0)) {
P_ERROR ("PTimeProfiler::pp_time_profiler_get_ticks_gtod: gettimeofday() failed");
return 0;
}
return (puint64) (tv.tv_sec * 1000000 + tv.tv_usec);
}
puint64
p_time_profiler_get_ticks_internal ()
{
return pp_time_profiler_ticks_func ();
}
puint64
p_time_profiler_elapsed_usecs_internal (const PTimeProfiler *profiler)
{
return pp_time_profiler_ticks_func () - profiler->counter;
}
void
p_time_profiler_init (void)
{
#if defined (P_OS_IRIX) || (_POSIX_MONOTONIC_CLOCK > 0)
pp_time_profiler_ticks_func = (PPOSIXTicksFunc) pp_time_profiler_get_ticks_clock;
#elif (_POSIX_MONOTONIC_CLOCK == 0) && defined (_SC_MONOTONIC_CLOCK)
if (P_LIKELY (sysconf (_SC_MONOTONIC_CLOCK) > 0))
pp_time_profiler_ticks_func = (PPOSIXTicksFunc) pp_time_profiler_get_ticks_clock;
else
pp_time_profiler_ticks_func = (PPOSIXTicksFunc) pp_time_profiler_get_ticks_gtod;
#else
pp_time_profiler_ticks_func = (PPOSIXTicksFunc) pp_time_profiler_get_ticks_gtod;
#endif
}
void
p_time_profiler_shutdown (void)
{
pp_time_profiler_ticks_func = NULL;
}
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