From 88e4058fc4ab8c4215327154f4c32f0652bb3e6b Mon Sep 17 00:00:00 2001 From: Pau Espin Pedrol Date: Wed, 17 Feb 2021 17:46:02 +0100 Subject: Introduce osmo_gettid() API This API wraps conventional gettid() linux-specific API, which even in Linux itself is sometimes not properly supported/announced. This API also allows future porting to other platforms if needed, and so far falls back to getpid() if no gettid(9 can be found. Code ported from osmo-trx.git, see commit 7a07de1efd4eb7cc11c33d3ad25cb2df70aa1ef1. Related: OS#5027 Change-Id: Id7534beeb22fcd50813dab76dd68818e2ff87ec2 --- src/Makefile.am | 1 + src/thread.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+) create mode 100644 src/thread.c (limited to 'src') diff --git a/src/Makefile.am b/src/Makefile.am index a2566a33..e56b57e2 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -25,6 +25,7 @@ libosmocore_la_SOURCES = context.c timer.c timer_gettimeofday.c timer_clockgetti conv_acc.c conv_acc_generic.c sercomm.c prbs.c \ isdnhdlc.c \ tdef.c \ + thread.c \ sockaddr_str.c \ use_count.c \ exec.c \ diff --git a/src/thread.c b/src/thread.c new file mode 100644 index 00000000..956fee76 --- /dev/null +++ b/src/thread.c @@ -0,0 +1,60 @@ +/* + * (C) 2021 by sysmocom s.f.m.c. GmbH + * All Rights Reserved + * + * Author: Pau Espin Pedrol + * + * 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 +#include + +#include + +/*! 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 +} -- cgit v1.2.3