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/*
* Copyright (c) International Business Machines Corp., 2014
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* File: signal.c
* Author: Shaun Wetzstein <shaun@us.ibm.com>
* Descr:
* Note:
* Date: 10/03/10
*/
#include <unistd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <malloc.h>
#include <stdint.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include "misc.h"
#include "signal.h"
/* ======================================================================= */
const char *__signal_msg[] = {
"signal: unexpected NULL self pointer",
"signal: unexpected NULL callback structure",
};
#define SIGNAL_NULL (__signal_msg[0])
/* ======================================================================= */
void signal_init(signal_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(SIGNAL_NULL);
if (self->fd != -1)
close(self->fd), self->fd = -1;
sigemptyset(&self->mask);
self->flags = SFD_CLOEXEC;
self->fd = signalfd(self->fd, &self->mask, self->flags);
if (unlikely(self->fd == -1))
throw_errno(errno);
}
void signal_delete(signal_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(SIGNAL_NULL);
close(self->fd), self->fd = -1;
if (sigprocmask(SIG_UNBLOCK, &self->mask, NULL) == -1)
throw_errno(errno);
sigemptyset(&self->mask);
self->flags = 0;
}
int signal_fileno(signal_t * self)
{
if (unlikely(self == NULL))
throw_unexpected(SIGNAL_NULL);
return self->fd;
}
int signal_setmask(signal_t * self, const sigset_t mask)
{
if (unlikely(self == NULL))
throw_unexpected(SIGNAL_NULL);
self->mask = mask;
if (sigprocmask(SIG_BLOCK, &self->mask, NULL) == -1)
throw_errno(errno);
self->fd = signalfd(self->fd, &self->mask, self->flags);
if (unlikely(self->fd == -1))
throw_errno(errno);
return self->fd;
}
#if 0
void signal_wait1(signal_t * self)
{
signal_wait2(self, -1);
}
void signal_wait2(signal_t * self, int timeout)
{
if (unlikely(self == NULL))
throw_unexpected(SIGNAL_NULL);
struct epoll_event events[signal_EVENT_SIZE];
int rc = epoll_wait(self->fd, events,
signal_EVENT_SIZE, timeout);
for (int n = 0; n < rc; n++) {
signal_callback *cb = (signal_callback *) events[n].data.ptr;
if (cb != NULL)
if (cb->func != NULL)
cb->func((signal_event[1]) { {
events[n].data.u64 >> 32,
events[n].events}
}
, cb->data);
}
}
#endif
/* ======================================================================= */
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