posix/src/pthreadkill.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup POSIXAPI
0007  *
0008  * @brief Sends a signal Asynchronously directed to a thread
0009  */
0010
0011 /*
0012  *  3.3.10 Send a Signal to a Thread, P1003.1c/D10, p. 43
0013  *
0014  *  COPYRIGHT (c) 1989-2007.
0015  *  On-Line Applications Research Corporation (OAR).
0016  *
0017  * Redistribution and use in source and binary forms, with or without
0018  * modification, are permitted provided that the following conditions
0019  * are met:
0020  * 1. Redistributions of source code must retain the above copyright
0021  *    notice, this list of conditions and the following disclaimer.
0022  * 2. Redistributions in binary form must reproduce the above copyright
0023  *    notice, this list of conditions and the following disclaimer in the
0024  *    documentation and/or other materials provided with the distribution.
0025  *
0026  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0027  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0028  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0029  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0030  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0031  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0032  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0033  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0034  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0035  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0036  * POSSIBILITY OF SUCH DAMAGE.
0037  */
0038
0039 #ifdef HAVE_CONFIG_H
0040 #include "config.h"
0041 #endif
0042
0043 #include <pthread.h>
0044 #include <signal.h>
0045 #include <errno.h>
0046
0047 #include <rtems/posix/threadsup.h>
0048 #include <rtems/posix/psignalimpl.h>
0049 #include <rtems/score/threadimpl.h>
0050
0051 int pthread_kill( pthread_t thread, int sig )
0052 {
0053   Thread_Control    *the_thread;
0054   ISR_lock_Context   lock_context;
0055   POSIX_API_Control *api;
0056   Per_CPU_Control   *cpu_self;
0057
0058   if ( !is_valid_signo( sig ) ) {
0059     return EINVAL;
0060   }
0061
0062   the_thread = _Thread_Get( thread, &lock_context );
0063
0064   if ( the_thread == NULL ) {
0065     return ESRCH;
0066   }
0067
0068   api = the_thread->API_Extensions[ THREAD_API_POSIX ];
0069
0070   if ( _POSIX_signals_Vectors[ sig ].sa_handler == SIG_IGN ) {
0071     _ISR_lock_ISR_enable( &lock_context );
0072     return 0;
0073   }
0074
0075   /* XXX critical section */
0076
0077   api->signals_pending |= signo_to_mask( sig );
0078
0079   cpu_self = _Thread_Dispatch_disable_critical( &lock_context );
0080   _ISR_lock_ISR_enable( &lock_context );
0081
0082   (void) _POSIX_signals_Unblock_thread( the_thread, sig, NULL );
0083   _Thread_Dispatch_enable( cpu_self );
0084   return 0;
0085 }