[NaCl SDK] nacl_io: Add initial implementations of kill and signal

native_client_sdk/src/libraries/third_party/newlib-extras/sys/signal.h

+/* sys/signal.h */
+
+#ifndef _SYS_SIGNAL_H
+#define _SYS_SIGNAL_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "_ansi.h"
+#include <sys/features.h>
+#include <sys/types.h>
+
+/* #ifndef __STRICT_ANSI__*/
+
+typedef unsigned long sigset_t;
+
+#if defined(__rtems__)
+
+#if defined(_POSIX_REALTIME_SIGNALS)
+
+/* sigev_notify values
+   NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD.  */
+
+#define SIGEV_NONE   1  /* No asynchronous notification shall be delivered */
+                        /*   when the event of interest occurs. */
+#define SIGEV_SIGNAL 2  /* A queued signal, with an application defined */
+                        /*  value, shall be delivered when the event of */
+                        /*  interest occurs. */
+#define SIGEV_THREAD 3  /* A notification function shall be called to */
+                        /*   perform notification. */
+
+/*  Signal Generation and Delivery, P1003.1b-1993, p. 63
+    NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and
+          sigev_notify_attributes to the sigevent structure.  */
+
+union sigval {
+  int    sival_int;    /* Integer signal value */
+  void  *sival_ptr;    /* Pointer signal value */
+};
+
+struct sigevent {
+  int              sigev_notify;               /* Notification type */
+  int              sigev_signo;                /* Signal number */
+  union sigval     sigev_value;                /* Signal value */
+
+#if defined(_POSIX_THREADS)
+  void           (*sigev_notify_function)( union sigval );
+                                               /* Notification function */
+  pthread_attr_t  *sigev_notify_attributes;    /* Notification Attributes */
+#endif
+};
+
+/* Signal Actions, P1003.1b-1993, p. 64 */
+/* si_code values, p. 66 */
+
+#define SI_USER    1    /* Sent by a user. kill(), abort(), etc */
+#define SI_QUEUE   2    /* Sent by sigqueue() */
+#define SI_TIMER   3    /* Sent by expiration of a timer_settime() timer */
+#define SI_ASYNCIO 4    /* Indicates completion of asycnhronous IO */
+#define SI_MESGQ   5    /* Indicates arrival of a message at an empty queue */
+
+typedef struct {
+  int          si_signo;    /* Signal number */
+  int          si_code;     /* Cause of the signal */
+  union sigval si_value;    /* Signal value */
+} siginfo_t;
+#endif
+
+/*  3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */
+
+#define SA_NOCLDSTOP 1   /* Do not generate SIGCHLD when children stop */
+#define SA_SIGINFO   2   /* Invoke the signal catching function with */
+                         /*   three arguments instead of one. */
+
+/* struct sigaction notes from POSIX:
+ *
+ *  (1) Routines stored in sa_handler should take a single int as
+ *      their argument although the POSIX standard does not require this.
+ *      This is not longer true since at least POSIX.1-2008
+ *  (2) The fields sa_handler and sa_sigaction may overlap, and a conforming
+ *      application should not use both simultaneously.
+ */
+
+typedef void (*_sig_func_ptr)(int);
+
+struct sigaction {
+  int         sa_flags;       /* Special flags to affect behavior of signal */
+  sigset_t    sa_mask;        /* Additional set of signals to be blocked */
+                              /*   during execution of signal-catching */
+                              /*   function. */
+  union {
+    _sig_func_ptr _handler;  /* SIG_DFL, SIG_IGN, or pointer to a function */
+#if defined(_POSIX_REALTIME_SIGNALS)
+    void      (*_sigaction)( int, siginfo_t *, void * );
+#endif
+  } _signal_handlers;
+};
+
+#define sa_handler    _signal_handlers._handler
+#if defined(_POSIX_REALTIME_SIGNALS)
+#define sa_sigaction  _signal_handlers._sigaction
+#endif
+
+#elif defined(__CYGWIN__)
+#include <cygwin/signal.h>
+#else
+#define SA_NOCLDSTOP 1  /* only value supported now for sa_flags */
+
+typedef void (*_sig_func_ptr)(int);
+
+struct sigaction 
+{
+        _sig_func_ptr sa_handler;
+        sigset_t sa_mask;
+        int sa_flags;
+};
+#endif /* defined(__rtems__) */
+
+#define SIG_SETMASK 0   /* set mask with sigprocmask() */
+#define SIG_BLOCK 1     /* set of signals to block */
+#define SIG_UNBLOCK 2   /* set of signals to, well, unblock */
+
+/* These depend upon the type of sigset_t, which right now 
+   is always a long.. They're in the POSIX namespace, but
+   are not ANSI. */
+#define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0)
+#define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0)
+#define sigemptyset(what)   (*(what) = 0, 0)
+#define sigfillset(what)    (*(what) = ~(0), 0)
+#define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0)
+
+int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset));
+
+#if defined(_POSIX_THREADS)
+int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset));
+#endif
+
+/* protos for functions found in winsup sources for CYGWIN */
+#if defined(__CYGWIN__) || defined(__rtems__) || defined (__native_client__)
+#undef sigaddset
+#undef sigdelset
+#undef sigemptyset
+#undef sigfillset
+#undef sigismember
+
+int _EXFUN(kill, (pid_t, int));
+int _EXFUN(killpg, (pid_t, int));
+int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *));
+int _EXFUN(sigaddset, (sigset_t *, const int));
+int _EXFUN(sigdelset, (sigset_t *, const int));
+int _EXFUN(sigismember, (const sigset_t *, int));
+int _EXFUN(sigfillset, (sigset_t *));
+int _EXFUN(sigemptyset, (sigset_t *));
+int _EXFUN(sigpending, (sigset_t *));
+int _EXFUN(sigsuspend, (const sigset_t *));
+int _EXFUN(sigpause, (int));
+
+#if defined(_POSIX_THREADS)
+#ifdef __CYGWIN__
+#  ifndef _CYGWIN_TYPES_H
+#    error You need the winsup sources or a cygwin installation to compile the cygwin version of newlib.
+#  endif
+#endif
+int _EXFUN(pthread_kill, (pthread_t thread, int sig));
+#endif
+
+#if defined(_POSIX_REALTIME_SIGNALS)
+
+/*  3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76
+    NOTE: P1003.1c/D10, p. 39 adds sigwait().  */
+
+int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info));
+int _EXFUN(sigtimedwait,
+  (const sigset_t *set, siginfo_t *info, const struct timespec  *timeout)
+);
+int _EXFUN(sigwait, (const sigset_t *set, int *sig));
+
+/*  3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */
+int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value));
+
+#endif /* defined(_POSIX_REALTIME_SIGNALS) */
+
+#endif /* defined(__CYGWIN__) || defined(__rtems__) */
+
+/* #endif __STRICT_ANSI__ */
+
+#if defined(___AM29K__)
+/* These all need to be defined for ANSI C, but I don't think they are
+   meaningful.  */
+#define SIGABRT 1
+#define SIGFPE 1
+#define SIGILL 1
+#define SIGINT 1
+#define SIGSEGV 1
+#define SIGTERM 1
+/* These need to be defined for POSIX, and some others do too.  */
+#define SIGHUP 1
+#define SIGQUIT 1
+#define NSIG 2
+#elif defined(__GO32__)
+#define SIGINT  1
+#define SIGKILL 2
+#define SIGPIPE 3
+#define SIGFPE  4
+#define SIGHUP  5
+#define SIGTERM 6
+#define SIGSEGV 7
+#define SIGTSTP 8
+#define SIGQUIT 9
+#define SIGTRAP 10
+#define SIGILL  11
+#define SIGEMT  12
+#define SIGALRM 13
+#define SIGBUS  14
+#define SIGLOST 15
+#define SIGSTOP 16
+#define SIGABRT 17
+#define SIGUSR1 18
+#define SIGUSR2 19
+#define NSIG    20
+#elif !defined(SIGTRAP)
+#define SIGHUP  1       /* hangup */
+#define SIGINT  2       /* interrupt */
+#define SIGQUIT 3       /* quit */
+#define SIGILL  4       /* illegal instruction (not reset when caught) */
+#define SIGTRAP 5       /* trace trap (not reset when caught) */
+#define SIGIOT  6       /* IOT instruction */
+#define SIGABRT 6       /* used by abort, replace SIGIOT in the future */
+#define SIGEMT  7       /* EMT instruction */
+#define SIGFPE  8       /* floating point exception */
+#define SIGKILL 9       /* kill (cannot be caught or ignored) */
+#define SIGBUS  10      /* bus error */
+#define SIGSEGV 11      /* segmentation violation */
+#define SIGSYS  12      /* bad argument to system call */
+#define SIGPIPE 13      /* write on a pipe with no one to read it */
+#define SIGALRM 14      /* alarm clock */
+#define SIGTERM 15      /* software termination signal from kill */
+
+#if defined(__rtems__)
+#define SIGURG  16      /* urgent condition on IO channel */
+#define SIGSTOP 17      /* sendable stop signal not from tty */
+#define SIGTSTP 18      /* stop signal from tty */
+#define SIGCONT 19      /* continue a stopped process */
+#define SIGCHLD 20      /* to parent on child stop or exit */
+#define SIGCLD  20      /* System V name for SIGCHLD */
+#define SIGTTIN 21      /* to readers pgrp upon background tty read */
+#define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
+#define SIGIO   23      /* input/output possible signal */
+#define SIGPOLL SIGIO   /* System V name for SIGIO */
+#define SIGWINCH 24     /* window changed */
+#define SIGUSR1 25      /* user defined signal 1 */
+#define SIGUSR2 26      /* user defined signal 2 */
+
+/* Real-Time Signals Range, P1003.1b-1993, p. 61
+   NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX
+         (which is a minimum of 8) signals.
+ */
+#define SIGRTMIN 27
+#define SIGRTMAX 31
+#define __SIGFIRSTNOTRT SIGHUP
+#define __SIGLASTNOTRT  SIGUSR2
+
+#define NSIG    32      /* signal 0 implied */
+
+#elif defined(__svr4__)
+/* svr4 specifics. different signals above 15, and sigaction. */
+#define SIGUSR1 16
+#define SIGUSR2 17
+#define SIGCLD  18
+#define SIGPWR  19
+#define SIGWINCH 20
+#define SIGPOLL 22      /* 20 for x.out binaries!!!! */
+#define SIGSTOP 23      /* sendable stop signal not from tty */
+#define SIGTSTP 24      /* stop signal from tty */
+#define SIGCONT 25      /* continue a stopped process */
+#define SIGTTIN 26      /* to readers pgrp upon background tty read */
+#define SIGTTOU 27      /* like TTIN for output if (tp->t_local&LTOSTOP) */
+#define NSIG    28      
+#else
+#define SIGURG  16      /* urgent condition on IO channel */
+#define SIGSTOP 17      /* sendable stop signal not from tty */
+#define SIGTSTP 18      /* stop signal from tty */
+#define SIGCONT 19      /* continue a stopped process */
+#define SIGCHLD 20      /* to parent on child stop or exit */
+#define SIGCLD  20      /* System V name for SIGCHLD */
+#define SIGTTIN 21      /* to readers pgrp upon background tty read */
+#define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
+#define SIGIO   23      /* input/output possible signal */
+#define SIGPOLL SIGIO   /* System V name for SIGIO */
+#define SIGXCPU 24      /* exceeded CPU time limit */
+#define SIGXFSZ 25      /* exceeded file size limit */
+#define SIGVTALRM 26    /* virtual time alarm */
+#define SIGPROF 27      /* profiling time alarm */
+#define SIGWINCH 28     /* window changed */
+#define SIGLOST 29      /* resource lost (eg, record-lock lost) */
+#define SIGUSR1 30      /* user defined signal 1 */
+#define SIGUSR2 31      /* user defined signal 2 */
+#define NSIG    32      /* signal 0 implied */
+#endif
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#ifndef _SIGNAL_H_
+/* Some applications take advantage of the fact that <sys/signal.h>
+ * and <signal.h> are equivalent in glibc.  Allow for that here.  */
+#include <signal.h>
+#endif
+#endif /* _SYS_SIGNAL_H */