sched/pthread_kill.c

/************************************************************************
 * sched/pthread_kill.c
 *
 *   Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 *
 * 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 NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT OWNER 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.
 *
 ************************************************************************/

/************************************************************************
 * Included Files
 ************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>
#include <signal.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>

/************************************************************************
 * Global Functions
 ************************************************************************/

/************************************************************************
 * Function:  pthread_kill
 *
 * Description:
 *   The pthread_kill() system call can be used to send any
 *   signal to a thread.  See kill() for further information
 *   as this is just a simple wrapper around the kill()
 *   function.
 *
 * Parameters:
 *   thread - The id of the thread to receive the signal. Only
 *     positive, non-zero values of 'thread' are supported.
 *   signo - The signal number to send.  If 'signo' is zero,
 *     no signal is sent, but all error checking is performed.
 *
 * Return Value:
 *    On success the signal was send and zero is returned.
 *    On error one of the following error numbers is returned.
 *
 *    EINVAL An invalid signal was specified.
 *    EPERM  The thread does not have permission to send the
 *           signal to the target thread.
 *    ESRCH  No thread could be found corresponding to that
 *           specified by the given thread ID
 *    ENOSYS Do not support sending signals to process groups.
 *
 * Assumptions:
 *
 ************************************************************************/

int pthread_kill(pthread_t thread, int signo)
{
  int ret;

  *get_errno_ptr() = EINVAL;
  ret = kill((pid_t)thread, signo);
  if (ret != OK)
    {
       ret = *get_errno_ptr();
    }
  return ret;
}