signal.h

/*
 * Copyright (C) 2006 Gilles Chanteperdrix <[email protected]>.
 *
 * 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.
 */

#ifndef _XENO_POSIX_SIGNAL_H
#define _XENO_POSIX_SIGNAL_H

#if defined(__KERNEL__) || defined(__XENO_SIM__)

#include <nucleus/xenomai.h>

#ifdef __KERNEL__
#include <linux/signal.h>

/* These are not defined in kernel-space headers. */
#define sa_sigaction sa_handler
typedef void (*sighandler_t) (int sig);
typedef unsigned long sig_atomic_t;
#endif /* __KERNEL__ */

#ifdef __XENO_SIM__
#include <posix_overrides.h>
#endif /* __XENO_SIM__ */

#undef sigemptyset
#undef sigfillset
#undef sigaddset
#undef sigdelset
#undef sigismember
#undef sigaction
#undef sigqueue
#undef SIGRTMIN
#undef SIGRTMAX

#define sigaction(sig, action, old) pse51_sigaction(sig, action, old)
#define sigemptyset pse51_sigemptyset
#define sigfillset pse51_sigfillset
#define sigaddset pse51_sigaddset
#define sigdelset pse51_sigdelset
#define sigismember pse51_sigismember

#define SIGRTMIN 33
#define SIGRTMAX 64

struct pse51_thread;

#ifdef __cplusplus
extern "C" {
#endif

int sigemptyset(sigset_t *set);

int sigfillset(sigset_t *set);

int sigaddset(sigset_t *set,
              int signum);

int sigdelset(sigset_t *set,
              int signum);

int sigismember(const sigset_t *set,
                int signum);

int pthread_kill(struct pse51_thread *thread,
                 int sig);

int pthread_sigmask(int how,
                    const sigset_t *set,
                    sigset_t *oset);

int sigaction(int sig,
              const struct sigaction *action,
              struct sigaction *old);

int sigpending(sigset_t *set);

int sigwait(const sigset_t *set,
            int *sig);

/* Real-time signals. */
int sigwaitinfo(const sigset_t *__restrict__ set,
                siginfo_t *__restrict__ info);

int sigtimedwait(const sigset_t *__restrict__ user_set,
                 siginfo_t *__restrict__ info,
                 const struct timespec *__restrict__ timeout);

int pthread_sigqueue_np (struct pse51_thread *thread, int sig, union sigval value);

#ifdef __cplusplus
}
#endif

#else /* !(__KERNEL__ || __XENO_SIM__) */

#pragma GCC system_header

#include_next <signal.h>
/* In case signal.h is included for a side effect of an __need* macro, include
   it a second time to get all definitions. */
#include_next <signal.h>

#endif /* !(__KERNEL__ || __XENO_SIM__) */

/*
 * Those are pseudo-signals only available with pthread_kill() to
 * suspend/resume/unblock threads synchronously via the low-level
 * nucleus interface. Can't block them, queue them, or even set them
 * in a sigset. Those are nasty, strictly anti-POSIX things; we do
 * provide them nevertheless only because we are mean people doing
 * harmful code for no valid reason. Can't go against your nature,
 * right?  Nah... (this said, don't blame us for POSIX, we are not
 * _that_ mean).
 */
#define SIGSUSP (SIGRTMAX + 1)
#define SIGRESM (SIGRTMAX + 2)
#define SIGRELS (SIGRTMAX + 3)

#endif /* _XENO_POSIX_SIGNAL_H */