134 lines
4.7 KiB
C
134 lines
4.7 KiB
C
/****************************************************************************
|
|
* sched/signal/sig_mqnotempty.c
|
|
*
|
|
* Copyright (C) 2007-2009, 2013, 2015 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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 <nuttx/compiler.h>
|
|
|
|
#include <signal.h>
|
|
#include <sched.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include "sched/sched.h"
|
|
#include "signal/signal.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Type Declarations
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Variables
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functionss
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: sig_mqnotempty
|
|
*
|
|
* Description:
|
|
* This function is equivalent to sigqueue(), but supports the messaging
|
|
* system's requirement to signal a task when a message queue becomes
|
|
* non-empty. It is identical to sigqueue(), except that it sets the
|
|
* si_code field in the siginfo structure to SI_MESGQ rather than SI_QUEUE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_CAN_PASS_STRUCTS
|
|
int sig_mqnotempty(int pid, int signo, union sigval value)
|
|
#else
|
|
int sig_mqnotempty(int pid, int signo, void *sival_ptr)
|
|
#endif
|
|
{
|
|
#ifdef CONFIG_SCHED_HAVE_PARENT
|
|
FAR struct tcb_s *rtcb = (FAR struct tcb_s *)g_readytorun.head;
|
|
#endif
|
|
siginfo_t info;
|
|
int ret;
|
|
|
|
#ifdef CONFIG_CAN_PASS_STRUCTS
|
|
sdbg("pid=%p signo=%d value=%d\n", pid, signo, value.sival_int);
|
|
#else
|
|
sdbg("pid=%p signo=%d sival_ptr=%p\n", pid, signo, sival_ptr);
|
|
#endif
|
|
|
|
/* Verify that we can perform the signalling operation */
|
|
|
|
if (!GOOD_SIGNO(signo))
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Create the siginfo structure */
|
|
|
|
info.si_signo = signo;
|
|
info.si_code = SI_MESGQ;
|
|
info.si_errno = OK;
|
|
#ifdef CONFIG_CAN_PASS_STRUCTS
|
|
info.si_value = value;
|
|
#else
|
|
info.si_value.sival_ptr = sival_ptr;
|
|
#endif
|
|
#ifdef CONFIG_SCHED_HAVE_PARENT
|
|
info.si_pid = rtcb->pid;
|
|
info.si_status = OK;
|
|
#endif
|
|
|
|
/* Process the receipt of the signal */
|
|
|
|
sched_lock();
|
|
ret = sig_dispatch(pid, &info);
|
|
sched_unlock();
|
|
|
|
return ret;
|
|
}
|