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/*
* File : signal.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2017, RT-Thread Development Team
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017/10/1 Bernard The first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <time.h>
#include "posix_signal.h"
#define sig_valid(sig_no) (sig_no >= 0 && sig_no < RT_SIG_MAX)
void (*signal(int sig, void (*func)(int))) (int)
{
return rt_signal_install(sig, func);
}
int sigprocmask (int how, const sigset_t *set, sigset_t *oset)
{
rt_base_t level;
rt_thread_t tid;
tid = rt_thread_self();
level = rt_hw_interrupt_disable();
if (oset) *oset = tid->sig_mask;
if (set)
{
switch(how)
{
case SIG_BLOCK:
tid->sig_mask |= *set;
break;
case SIG_UNBLOCK:
tid->sig_mask &= ~*set;
break;
case SIG_SETMASK:
tid->sig_mask = *set;
break;
default:
break;
}
}
rt_hw_interrupt_enable(level);
return 0;
}
int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact)
{
rt_sighandler_t old = RT_NULL;
if (!sig_valid(signum)) return -RT_ERROR;
if (act)
old = rt_signal_install(signum, act->sa_handler);
else
{
old = rt_signal_install(signum, RT_NULL);
rt_signal_install(signum, old);
}
if (oldact)
oldact->sa_handler = old;
return 0;
}
int sigtimedwait(const sigset_t *set, siginfo_t *info,
const struct timespec *timeout)
{
int ret = 0;
int tick = RT_WAITING_FOREVER;
#ifdef RT_USING_PTHREADS
if (timeout)
{
extern int clock_time_to_tick(const struct timespec *time);
tick = clock_time_to_tick(timeout);
}
#endif
ret = rt_signal_wait(set, info, tick);
if (ret == 0) return 0;
errno = ret;
return -1;
}
int sigwait(const sigset_t *set, int *sig)
{
siginfo_t si;
if (sigtimedwait(set, &si, 0) < 0)
return -1;
*sig = si.si_signo;
return 0;
}
int sigwaitinfo(const sigset_t *set, siginfo_t *info)
{
return sigtimedwait(set, info, NULL);
}
int raise(int sig)
{
rt_thread_kill(rt_thread_self(), sig);
return 0;
}
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