libthr: add pthread_sigqueue(3)

PR:	278459
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D44867
This commit is contained in:
Konstantin Belousov 2024-04-19 17:40:40 +03:00
parent 97acb35bd7
commit 220aa0f450
5 changed files with 92 additions and 0 deletions

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@ -43,6 +43,9 @@
#include <machine/_limits.h>
#include <sys/_types.h>
#include <sys/_sigset.h>
#if __BSD_VISIBLE
#include <sys/_sigval.h>
#endif
#include <sched.h>
#include <time.h>
@ -302,6 +305,10 @@ void pthread_yield(void);
int pthread_getname_np(pthread_t, char *, size_t);
int pthread_setname_np(pthread_t, const char *);
int pthread_sigqueue(pthread_t thread, int sig,
const union sigval value);
#endif
int pthread_mutexattr_getprioceiling(

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@ -337,3 +337,7 @@ FBSD_1.6 {
pthread_peekjoin_np;
pthread_setname_np;
};
FBSD_1.8 {
pthread_sigqueue;
};

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@ -47,6 +47,7 @@ SRCS+= \
thr_setprio.c \
thr_setschedparam.c \
thr_sig.c \
thr_sigqueue.c \
thr_single_np.c \
thr_sleepq.c \
thr_spec.c \

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@ -1102,6 +1102,7 @@ int __Tthr_mutex_lock(pthread_mutex_t *);
int __Tthr_mutex_trylock(pthread_mutex_t *);
bool __thr_get_main_stack_base(char **base);
bool __thr_get_main_stack_lim(size_t *lim);
int _Tthr_sigqueue(pthread_t pthread, int sig, const union sigval value);
__END_DECLS
__NULLABILITY_PRAGMA_POP

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@ -0,0 +1,79 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>.
* All rights reserved.
*
* Copyright 2024 The FreeBSD Foundation
*
* Portions of this software were developed by Konstantin Belousov
* <kib@FreeBSD.org> under sponsorship from the FreeBSD Foundation.
*
* 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL 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 AUTHOR 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.
*/
#include "namespace.h"
#include <errno.h>
#include <signal.h>
#include <pthread.h>
#include "un-namespace.h"
#include "thr_private.h"
__weak_reference(_Tthr_sigqueue, _pthread_sigqueue);
__weak_reference(_Tthr_sigqueue, pthread_sigqueue);
int
_Tthr_sigqueue(pthread_t pthread, int sig, const union sigval value)
{
struct pthread *curthread;
int e, ret;
if (sig < 0 || sig > _SIG_MAXSIG)
return (EINVAL);
curthread = _get_curthread();
ret = 0;
if (curthread == pthread) {
if (sig > 0) {
e = sigqueue(pthread->tid, sig | __SIGQUEUE_TID,
value);
if (e == -1)
ret = errno;
}
} else if ((ret = _thr_find_thread(curthread, pthread,
0)) == 0) {
if (sig > 0) {
e = sigqueue(pthread->tid, sig | __SIGQUEUE_TID,
value);
if (e == -1)
ret = errno;
}
THR_THREAD_UNLOCK(curthread, pthread);
}
return (ret);
}