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/*
* (C) 2021 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
* All Rights Reserved
*
* Author: Pau Espin Pedrol <pespin@sysmocom.de>
*
* 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.
*
*/
/*! \addtogroup thread
* @{
* \file thread.c
*/
/*! \file thread.c
*/
#include "config.h"
/* If HAVE_GETTID, then "_GNU_SOURCE" may need to be defined to use gettid() */
#if HAVE_GETTID
#define _GNU_SOURCE
#endif
#include <unistd.h>
#include <sys/types.h>
#include <osmocom/core/thread.h>
/*! Wrapper around Linux's gettid() to make it easily accessible on different system versions.
* If the gettid() API cannot be found, it will use the syscall directly if
* available. If no syscall is found available, then getpid() is called as
* fallback. See 'man 2 gettid' for further and details information.
* \returns This call is always successful and returns returns the thread ID of
* the calling thread (or the process ID of the current process if
* gettid() or its syscall are unavailable in the system).
*/
pid_t osmo_gettid(void)
{
#if HAVE_GETTID
return gettid();
#elif defined(LINUX) && defined(__NR_gettid)
return (pid_t) syscall(__NR_gettid);
#else
#pragma message ("use pid as tid")
return getpid();
#endif
}
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