mirror of
https://github.com/varun-r-mallya/sysprof.git
synced 2025-12-31 20:36:25 +00:00
101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
/* sysprof-clock.c
|
|
*
|
|
* Copyright 2016-2019 Christian Hergert <chergert@redhat.com>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* Subject to the terms and conditions of this license, each copyright holder
|
|
* and contributor hereby grants to those receiving rights under this license
|
|
* a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
|
|
* irrevocable (except for failure to satisfy the conditions of this license)
|
|
* patent license to make, have made, use, offer to sell, sell, import, and
|
|
* otherwise transfer this software, where such license applies only to those
|
|
* patent claims, already acquired or hereafter acquired, licensable by such
|
|
* copyright holder or contributor that are necessarily infringed by:
|
|
*
|
|
* (a) their Contribution(s) (the licensed copyrights of copyright holders
|
|
* and non-copyrightable additions of contributors, in source or binary
|
|
* form) alone; or
|
|
*
|
|
* (b) combination of their Contribution(s) with the work of authorship to
|
|
* which such Contribution(s) was added by such copyright holder or
|
|
* contributor, if, at the time the Contribution is added, such addition
|
|
* causes such combination to be necessarily infringed. The patent license
|
|
* shall not apply to any other combinations which include the
|
|
* Contribution.
|
|
*
|
|
* Except as expressly stated above, no rights or licenses from any copyright
|
|
* holder or contributor is granted under this license, whether expressly, by
|
|
* implication, estoppel or otherwise.
|
|
*
|
|
* DISCLAIMER
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
|
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <assert.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "sysprof-clock.h"
|
|
#include "sysprof-macros-internal.h"
|
|
|
|
int sysprof_clock = -1;
|
|
|
|
void
|
|
sysprof_clock_init (void)
|
|
{
|
|
static const int clock_ids[] = {
|
|
#ifdef __APPLE__
|
|
_CLOCK_MONOTONIC,
|
|
#else
|
|
CLOCK_MONOTONIC,
|
|
#endif
|
|
#ifdef __linux__
|
|
CLOCK_MONOTONIC_RAW,
|
|
CLOCK_MONOTONIC_COARSE,
|
|
CLOCK_REALTIME_COARSE,
|
|
#endif
|
|
CLOCK_REALTIME,
|
|
};
|
|
|
|
if (sysprof_clock != -1)
|
|
return;
|
|
|
|
for (unsigned int i = 0; i < SYSPROF_N_ELEMENTS (clock_ids); i++)
|
|
{
|
|
struct timespec ts;
|
|
int clock_id = clock_ids [i];
|
|
|
|
if (0 == clock_gettime (clock_id, &ts))
|
|
{
|
|
sysprof_clock = clock_id;
|
|
return;
|
|
}
|
|
}
|
|
|
|
sysprof_assert_not_reached ();
|
|
}
|