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Diffstat (limited to 'nuttx/include/signal.h')
| -rw-r--r-- | nuttx/include/signal.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/nuttx/include/signal.h b/nuttx/include/signal.h new file mode 100644 index 0000000000..67236fd6c5 --- /dev/null +++ b/nuttx/include/signal.h @@ -0,0 +1,176 @@ +/************************************************************ + * signal.h + * + * 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. + * + ************************************************************/ + +#ifndef __SIGNAL_H +#define __SIGNAL_H + +/************************************************************ + * Included Files + ************************************************************/ + +#include <time.h> /* Needed for struct timespec */ +#include <sys/types.h> /* Needed for, e.g., sigset_t */ + +/************************************************************ + * Compilations Switches + ************************************************************/ + +/************************************************************ + * Definitions + ************************************************************/ + +/* Signal set management definitions and macros. */ + +#define NULL_SIGNAL_SET ((sigset_t)0x00000000) +#define ALL_SIGNAL_SET ((sigset_t)0xffffffff) +#define MIN_SIGNO 0 +#define MAX_SIGNO 31 +#define GOOD_SIGNO(s) (((s)>=MIN_SIGNO)&&((s)<=MAX_SIGNO)) +#define SIGNO2SET(s) ((sigset_t)1 << (s)) + +/* sigprocmask() "how" definitions. Only one of the following + * can be specified: + */ + +#define SIG_BLOCK 1 +#define SIG_UNBLOCK 2 +#define SIG_SETMASK 3 + +/* struct sigaction flag values */ + +#define SA_NOCLDSTOP 1 /* Do not generate SIGCHILD when + * children stop (ignored) */ +#define SA_SIGINFO 2 /* Invoke the signal-catching function + * with 3 args instead of 1 + * (always assumed) */ + +/* Dummy value for the sigev_notify field of struct sigevent */ + +#define SIGEV_SIGNAL 0 + +/* These are the possible values of the signfo si_code field */ + +#define SI_QUEUE 0 /* Signal sent from sigqueue */ +#define SI_MESGQ 1 /* Signal generated by arrival of a message on an + * empty message queue */ +#define SI_NOWAIT 2 /* Signal already pending -- don't know how sent */ +#define SI_TIMEOUT 3 /* No-signal, unblocked by timeout */ + +/************************************************************ + * Global Type Declarations + ************************************************************/ + +/* This defines a set of 32 signals (numbered 0 through 31). */ + +typedef uint32 sigset_t; + +/* This defines the type of the siginfo si_value field */ + +union sigval +{ + int sival_int; + void *sival_ptr; +}; + +/* The following types is used to pass parameters to/from + * signal handlers + */ + +typedef struct siginfo +{ + int si_signo; + int si_code; + union sigval si_value; +} siginfo_t; + +/* The following structure defines the action to take for given signal */ + +typedef void saHandType(int signo); +typedef void saVxHandType(int signo, siginfo_t *info, void *context); +struct sigaction +{ + union + { + saHandType *_sa_handler; + saVxHandType *_sa_sigaction; + } sa_u; + sigset_t sa_mask; + int sa_flags; +}; +#define sa_handler sa_u._sa_handler +#define sa_sigaction sa_u._sa_sigaction + +/************************************************************ + * Global Variables + ************************************************************/ + +/************************************************************ + * Global Function Prototypes + ************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +EXTERN int sigemptyset(sigset_t *set); +EXTERN int sigfillset(sigset_t *set); +EXTERN int sigaddset(sigset_t *set, int signo); +EXTERN int sigdelset(sigset_t *set, int signo); +EXTERN int sigismember(const sigset_t *set, int signo); +EXTERN int sigaction(int sig, + const struct sigaction *act, + struct sigaction *oact); +EXTERN int sigprocmask(int how, const sigset_t *set, + sigset_t *oset); +EXTERN int sigpending(sigset_t *set); +EXTERN int sigsuspend(const sigset_t *sigmask); +EXTERN int sigwaitinfo(const sigset_t *set, + struct siginfo *value); +EXTERN int sigtimedwait(const sigset_t *set, + struct siginfo *value, + const struct timespec *timeout); +EXTERN int sigqueue(int tid, int signo, + const union sigval value); + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __SIGNAL_H */ + |