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add new files for PBD::get_microseconds()

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This commit is contained in:
Paul Davis 2021-06-26 18:30:11 -06:00
parent 6b6114eb75
commit a2b5962b6c
2 changed files with 103 additions and 0 deletions
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69
libs/pbd/microseconds.cc Normal file
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/*
* Copyright (C) 2021 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2013-2015 Tim Mayberry <mojofunk@gmail.com>
* Copyright (C) 2014-2015 John Emmas <john@creativepost.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <time.h>
#ifdef PLATFORM_WINDOWS
#include <profileapi.h>
#include <windows.h> // for LARGE_INTEGER
#endif
#include "pbd/microseconds.h"
#ifdef PLATFORM_WINDOWS
static double timer_rate_usecs = 0.0;
#endif
void
PBD::microsecond_timer_init ()
{
#ifdef PLATFORM_WINDOWS
LARGE_INTEGER freq;
if (!QueryPerformanceFrequency(&freq) || freq.QuadPart < 1) {
info << X_("Failed to determine frequency of QPC\n") << endmsg;
timer_rate_us = 0;
} else {
timer_rate_us = 1000000.0 / freq.QuadPart;
}
#endif
}
PBD::microseconds_t
PBD::get_microseconds ()
{
#ifdef PLATFORM_WINDOWS
LARGE_INTEGER time;
if (time_rate_usecs) {
if (QueryPerformanceCounter (&time)) {
return (microseconds_t) (current_val.QuadPart * timer_rate_us);
}
}
return (microseconds_t) 0;
#else
struct timespec ts;
if (clock_gettime (CLOCK_MONOTONIC, &ts) != 0) {
/* EEEK! */
return 0;
}
return (microseconds_t)ts.tv_sec * 1000000 + (ts.tv_nsec / 1000);
#endif
}

34
libs/pbd/pbd/microseconds.h Normal file
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/*
* Copyright (C) 2021 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2013-2015 Tim Mayberry <mojofunk@gmail.com>
* Copyright (C) 2014-2015 John Emmas <john@creativepost.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __libpbd_microseconds_h__
#define __libpbd_microseconds_h__
#include <inttypes.h>
#include "pbd/libpbd_visibility.h"
namespace PBD {
typedef uint64_t microseconds_t;
LIBPBD_API microseconds_t get_microseconds();
void microsecond_timer_init ();
}
#endif /* __libpbd_microseconds_h__ */