/***********************************************************************
* sighand.c
*
* Copyright (C) 2007 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 Gregory Nutt 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.
*
***********************************************************************/
#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
#include <signal.h>
#include <sched.h>
#include <errno.h>
#include "ostest.h"
#ifndef NULL
# define NULL (void*)0
#endif
#define WAKEUP_SIGNAL 17
#define SIGVALUE_INT 42
static sem_t sem;
static boolean sigreceived = FALSE;
static boolean threadexited = FALSE;
static void wakeup_action(int signo, siginfo_t *info, void *ucontext)
{
sigset_t oldset;
sigset_t allsigs;
int status;
printf("%s: Received signal %d\n", __FUNCTION__, signo);
sigreceived = TRUE;
/* Check signo */
if (signo != WAKEUP_SIGNAL)
{
printf("%s: ERROR expected signo=%d\n", __FUNCTION__, WAKEUP_SIGNAL);
}
/* Check siginfo */
if (info->si_value.sival_int != SIGVALUE_INT)
{
printf("%s: ERROR sival_int=%d expected %d\n",
__FUNCTION__, info->si_value.sival_int, SIGVALUE_INT);
}
else
{
printf("%s: sival_int=%d\n", __FUNCTION__, info->si_value.sival_int);
}
if (info->si_signo != WAKEUP_SIGNAL)
{
printf("%s: ERROR expected si_signo=%d, got=%d\n",
__FUNCTION__, WAKEUP_SIGNAL, info->si_signo);
}
printf("%s: si_code=%d\n", __FUNCTION__, info->si_code);
/* Check ucontext_t */
printf("%s: ucontext=%p\n", __FUNCTION__, ucontext);
/* Check sigprocmask */
(void)sigfillset(&allsigs);
status = sigprocmask(SIG_SETMASK, NULL, &oldset);
if (status != OK)
{
printf("%s: ERROR sigprocmask failed, status=%d\n",
__FUNCTION__, status);
}
if (oldset != allsigs)
{
printf("%s: ERROR sigprocmask=%x expected=%x\n",
__FUNCTION__, oldset, allsigs);
}
}
static int waiter_main(int argc, char *argv[])
{
sigset_t sigset;
struct sigaction act;
struct sigaction oact;
int status;
printf("%s: Waiter started\n", __FUNCTION__);
printf("%s: Unmasking signal %d\n", __FUNCTION__, WAKEUP_SIGNAL);
(void)sigemptyset(&sigset);
(void)sigaddset(&sigset, WAKEUP_SIGNAL);
status = sigprocmask(SIG_UNBLOCK, &sigset, NULL);
if (status != OK)
{
printf("%s: ERROR sigprocmask failed, status=%d\n",
__FUNCTION__, status);
}
printf("%s: Registering signal handler\n", __FUNCTION__);
act.sa_sigaction = wakeup_action;
act.sa_flags = SA_SIGINFO;
(void)sigfillset(&act.sa_mask);
(void)sigdelset(&act.sa_mask, WAKEUP_SIGNAL);
status = sigaction(WAKEUP_SIGNAL, &act, &oact);
if (status != OK)
{
printf("%s: ERROR sigaction failed, status=%d\n", __FUNCTION__, status);
}
printf("%s: oact.sigaction=%p oact.sa_flags=%x oact.sa_mask=%x\n",
__FUNCTION__, oact.sa_sigaction, oact.sa_flags, oact.sa_mask);
/* Take the semaphore */
printf("%s: Waiting on semaphore\n", __FUNCTION__);
fflush(stdout);
status = sem_wait(&sem);
if (status != 0)
{
int error = *get_errno_ptr();
if (error == EINTR)
{
printf("%s: sem_wait() successfully interrupted by signal\n", __FUNCTION__);
}
else
{
printf("%s: ERROR sem_wait failed, errno=%d\n", __FUNCTION__, error);
}
}
else
{
printf("%s: ERROR awakened with no error!\n", __FUNCTION__);
}
printf("%s: done\n", __FUNCTION__);
fflush(stdout);
threadexited = TRUE;
return 0;
}
void sighand_test(void)
{
struct sched_param param;
union sigval sigvalue;
pid_t waiterpid;
int policy;
int status;
printf("%s: Initializing semaphore to 0\n", __FUNCTION__);
sem_init(&sem, 0, 0);
/* Start waiter thread */
printf("%s: Starting waiter task\n", __FUNCTION__);
status = sched_getparam (0, ¶m);
if (status != OK)
{
printf("%s: ERROR sched_getparam() failed\n", __FUNCTION__);
param.sched_priority = PTHREAD_DEFAULT_PRIORITY;
}
policy = sched_getscheduler(0);
if (policy == ERROR)
{
printf("%s: ERROR sched_getscheduler() failed\n", __FUNCTION__);
policy = SCHED_FIFO;
}
waiterpid = task_create("waiter", param.sched_priority,
PTHREAD_STACK_DEFAULT, waiter_main, 0, 0, 0, 0);
if (waiterpid == ERROR)
{
printf("%s: ERROR failed to start waiter_main\n", __FUNCTION__);
}
else
{
printf("%s: Started waiter_main pid=%d\n", __FUNCTION__, waiterpid);
}
/* Wait a bit */
fflush(stdout);
usleep(500*1000);
/* Then signal the waiter thread. */
sigvalue.sival_int = SIGVALUE_INT;
status = sigqueue(waiterpid, WAKEUP_SIGNAL, sigvalue);
if (status != OK)
{
printf("%s: ERROR sigqueue failed\n", __FUNCTION__);
task_delete(waiterpid);
}
/* Wait a bit */
fflush(stdout);
usleep(500*1000);
/* Then check the result */
if (!threadexited)
{
printf("%s: ERROR waiter task did not exit\n", __FUNCTION__);
}
if (!sigreceived)
{
printf("%s: ERROR signal handler did not run\n", __FUNCTION__);
}
printf("%s: done\n", __FUNCTION__);
fflush(stdout);
}
