jehanne: drafter sys/signal.h
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newlib/libc/sys/jehanne/sys/signal.h
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252
newlib/libc/sys/jehanne/sys/signal.h
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/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
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*
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* Jehanne is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* Jehanne is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Based upon newlib's sys/signal.h and
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* http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html
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*/
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#ifndef _SYS_SIGNAL_H
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#define _SYS_SIGNAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "_ansi.h"
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#include <sys/cdefs.h>
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#include <sys/features.h>
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#include <sys/types.h>
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#include <sys/_timespec.h>
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#include <sys/_pthreadtypes.h>
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#define _SIGSET_T_DECLARED
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typedef unsigned long sigset_t;
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/* sigev_notify values
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NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD. */
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#define SIGEV_NONE 1 /* No asynchronous notification shall be delivered */
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/* when the event of interest occurs. */
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#define SIGEV_SIGNAL 2 /* A queued signal, with an application defined */
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/* value, shall be delivered when the event of */
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/* interest occurs. */
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#define SIGEV_THREAD 3 /* A notification function shall be called to */
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/* perform notification. */
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/* Signal Generation and Delivery, P1003.1b-1993, p. 63
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NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and
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sigev_notify_attributes to the sigevent structure. */
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union sigval {
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int sival_int; /* Integer signal value */
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void *sival_ptr; /* Pointer signal value */
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};
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struct sigevent {
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int sigev_notify; /* Notification type */
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int sigev_signo; /* Signal number */
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union sigval sigev_value; /* Signal value */
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void (*sigev_notify_function)( union sigval );
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/* Notification function */
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pthread_attr_t *sigev_notify_attributes; /* Notification Attributes */
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};
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/* Signal Actions, P1003.1b-1993, p. 64 */
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/* si_code values, p. 66 */
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#define SI_USER 1 /* Sent by a user. kill(), abort(), etc */
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#define SI_QUEUE 2 /* Sent by sigqueue() */
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#define SI_TIMER 3 /* Sent by expiration of a timer_settime() timer */
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#define SI_ASYNCIO 4 /* Indicates completion of asycnhronous IO */
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#define SI_MESGQ 5 /* Indicates arrival of a message at an empty queue */
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typedef struct {
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int si_signo; /* Signal number */
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int si_code; /* Cause of the signal */
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union sigval si_value; /* Signal value */
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} siginfo_t;
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/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */
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#define SA_NOCLDSTOP 1 /* Do not generate SIGCHLD when children stop */
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#define SA_SIGINFO 2 /* Invoke the signal catching function with */
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/* three arguments instead of one. */
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#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
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#define SA_ONSTACK 4 /* Signal delivery will be on a separate stack. */
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#endif
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/* struct sigaction notes from POSIX:
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*
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* (1) Routines stored in sa_handler should take a single int as
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* their argument although the POSIX standard does not require this.
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* This is not longer true since at least POSIX.1-2008
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* (2) The fields sa_handler and sa_sigaction may overlap, and a conforming
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* application should not use both simultaneously.
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*/
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typedef void (*_sig_func_ptr)(int);
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typedef void (*_sigact_func_ptr)(int, siginfo_t *, void * );
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struct sigaction {
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int sa_flags; /* Special flags to affect behavior of signal */
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sigset_t sa_mask; /* Additional set of signals to be blocked */
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/* during execution of signal-catching */
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/* function. */
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union {
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_sig_func_ptr _handler; /* SIG_DFL, SIG_IGN, or pointer to a function */
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_sigact_func_ptr _sigaction;
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} _signal_handlers;
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};
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#define sa_handler _signal_handlers._handler
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#define sa_sigaction _signal_handlers._sigaction
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#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
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/*
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* Minimum and default signal stack constants. Allow for target overrides
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* from <sys/features.h>.
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*/
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#ifndef MINSIGSTKSZ
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#define MINSIGSTKSZ 2048
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#endif
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#ifndef SIGSTKSZ
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#define SIGSTKSZ 8192
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#endif
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/*
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* Possible values for ss_flags in stack_t below.
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*/
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#define SS_ONSTACK 0x1
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#define SS_DISABLE 0x2
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#endif
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/*
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* Structure used in sigaltstack call.
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*/
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typedef struct sigaltstack {
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void* ss_sp; /* Stack base or pointer. */
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int ss_flags; /* Flags. */
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size_t ss_size; /* Stack size. */
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} stack_t;
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#if __POSIX_VISIBLE
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#define SIG_SETMASK 0 /* set mask with sigprocmask() */
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#define SIG_BLOCK 1 /* set of signals to block */
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#define SIG_UNBLOCK 2 /* set of signals to, well, unblock */
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int sigprocmask (int how, const sigset_t *set, sigset_t *oset);
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#endif
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#if __POSIX_VISIBLE >= 199506
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int pthread_sigmask (int how, const sigset_t *set, sigset_t *oset);
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#endif
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#if __POSIX_VISIBLE
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int kill (pid_t, int);
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#endif
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#if __BSD_VISIBLE || __XSI_VISIBLE >= 4
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int killpg (pid_t, int);
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#endif
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#if __POSIX_VISIBLE
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int sigaction (int, const struct sigaction *, struct sigaction *);
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int sigaddset (sigset_t *, const int);
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int sigdelset (sigset_t *, const int);
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int sigismember (const sigset_t *, int);
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int sigfillset (sigset_t *);
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int sigemptyset (sigset_t *);
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int sigpending (sigset_t *);
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int sigsuspend (const sigset_t *);
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int sigwait (const sigset_t *set, int *sig);
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#endif /* __POSIX_VISIBLE */
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#if __XSI_VISIBLE
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int sigpause (int);
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#endif
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#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
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int sigaltstack (const stack_t *, stack_t *);
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#endif
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#if __POSIX_VISIBLE >= 199506
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int pthread_kill (pthread_t thread, int sig);
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#endif
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#if __POSIX_VISIBLE >= 199309
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/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76
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NOTE: P1003.1c/D10, p. 39 adds sigwait(). */
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int sigwaitinfo (const sigset_t *set, siginfo_t *info);
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int sigtimedwait (const sigset_t *set, siginfo_t *info, const struct timespec *timeout);
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int sigqueue (pid_t pid, int signo, const union sigval value);
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#endif /* __POSIX_VISIBLE >= 199309 */
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#define SIGHUP 1 /* hangup */
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#define SIGINT 2 /* interrupt */
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#define SIGQUIT 3 /* quit */
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#define SIGILL 4 /* illegal instruction (not reset when caught) */
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#define SIGTRAP 5 /* trace trap (not reset when caught) */
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#define SIGIOT 6 /* IOT instruction */
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#define SIGABRT 6 /* used by abort, replace SIGIOT in the future */
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#define SIGEMT 7 /* EMT instruction */
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#define SIGFPE 8 /* floating point exception */
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#define SIGKILL 9 /* kill (cannot be caught or ignored) */
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#define SIGBUS 10 /* bus error */
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#define SIGSEGV 11 /* segmentation violation */
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#define SIGSYS 12 /* bad argument to system call */
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#define SIGPIPE 13 /* write on a pipe with no one to read it */
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#define SIGALRM 14 /* alarm clock */
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#define SIGTERM 15 /* software termination signal from kill */
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#define SIGURG 16 /* urgent condition on IO channel */
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#define SIGSTOP 17 /* sendable stop signal not from tty */
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#define SIGTSTP 18 /* stop signal from tty */
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#define SIGCONT 19 /* continue a stopped process */
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#define SIGCHLD 20 /* to parent on child stop or exit */
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#define SIGCLD 20 /* System V name for SIGCHLD */
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#define SIGTTIN 21 /* to readers pgrp upon background tty read */
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#define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */
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#define SIGIO 23 /* input/output possible signal */
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#define SIGPOLL SIGIO /* System V name for SIGIO */
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#define SIGXCPU 24 /* exceeded CPU time limit */
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#define SIGXFSZ 25 /* exceeded file size limit */
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#define SIGVTALRM 26 /* virtual time alarm */
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#define SIGPROF 27 /* profiling time alarm */
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#define SIGWINCH 28 /* window changed */
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#define SIGLOST 29 /* resource lost (eg, record-lock lost) */
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#define SIGUSR1 30 /* user defined signal 1 */
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#define SIGUSR2 31 /* user defined signal 2 */
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#define NSIG 32 /* signal 0 implied */
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#ifdef __cplusplus
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}
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#endif
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#if defined(__CYGWIN__)
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#if __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
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#include <sys/ucontext.h>
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#endif
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#endif
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#ifndef _SIGNAL_H_
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/* Some applications take advantage of the fact that <sys/signal.h>
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* and <signal.h> are equivalent in glibc. Allow for that here. */
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#include <signal.h>
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#endif
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#endif /* _SYS_SIGNAL_H */
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