1/* System-specific extensions of <signal.h>, Linux version.
2 Copyright (C) 2019-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _SIGNAL_H
20# error "Never include <bits/signal_ext.h> directly; use <signal.h> instead."
21#endif
22
23#ifdef __USE_GNU
24
25/* Send SIGNAL to the thread TID in the thread group (process)
26 identified by TGID. This function behaves like kill, but also
27 fails with ESRCH if the specified TID does not belong to the
28 specified thread group. */
29extern int tgkill (__pid_t __tgid, __pid_t __tid, int __signal);
30
31#endif /* __USE_GNU */
32

source code of include/x86_64-linux-gnu/bits/signal_ext.h