ca713cfab3
to force signal to be handled. Zero event here to prevent races. * signal.cc (sigwaitinfo): Use local handle value for everything since signal thread could zero event element at any time. Detect when awaking due to thread not in mask and set return value and errno accordingly. Don't set signal number to zero unless we've recognized the signal. * sigproc.cc (sigq): Rename from sigqueue throughout. * thread.cc (pthread::join): Handle signals received while waiting for thread to terminate. * cygwin.din: Export sighold, sigqueue. * exceptions.cc (sighold): Define new function. * signal.cc (handle_sigprocmask): Set correct errno for invalid signal. Simplify debugging output. (sigqueue): Define new function. * include/cygwin/signal.h (sighold): Declare new function. (sigqueue): Ditto. * include/cygwin/version.h: Bump API minor version number. * include/limits.h (TIMER_MAX): Define. (_POSIX_TIMER_MAX): Ditto.
215 lines
6.4 KiB
C
215 lines
6.4 KiB
C
/* signal.h
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Copyright 2004 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _CYGWIN_SIGNAL_H
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#define _CYGWIN_SIGNAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if 0
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struct ucontext
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{
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unsigned long uc_flags;
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void *uc_link;
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stack_t uc_stack;
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struct sigcontext uc_mcontext;
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sigset_t uc_sigmask;
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};
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#endif
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typedef union sigval
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{
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int sival_int; /* integer signal value */
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void *sival_ptr; /* pointer signal value */
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} sigval_t;
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typedef struct sigevent
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{
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sigval_t sigev_value; /* signal value */
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int sigev_signo; /* signal number */
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int sigev_notify; /* notification type */
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void (*sigev_notify_function) (sigval_t); /* notification function */
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pthread_attr_t *sigev_notify_attributes; /* notification attributes */
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} sigevent_t;
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#pragma pack(push,4)
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typedef struct
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{
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int si_signo; /* signal number */
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int si_code; /* signal code */
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pid_t si_pid; /* sender's pid */
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uid_t si_uid; /* sender's uid */
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int si_errno; /* errno associated with signal */
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union
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{
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__uint32_t __pad[32]; /* plan for future growth */
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union
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{
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/* timers */
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struct
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{
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union
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{
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struct
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{
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timer_t si_tid; /* timer id */
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unsigned int si_overrun; /* overrun count */
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};
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sigval_t si_sigval; /* signal value */
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sigval_t si_value; /* signal value */
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};
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};
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};
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/* SIGCHLD */
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struct
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{
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int si_status; /* exit code */
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clock_t si_utime; /* user time */
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clock_t si_stime; /* system time */
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};
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/* core dumping signals */
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void *si_addr; /* faulting address */
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};
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} siginfo_t;
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#pragma pack(pop)
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enum
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{
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SI_USER = 1, /* sent by kill, raise, pthread_kill */
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SI_ASYNCIO, /* sent by AIO completion (currently
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unimplemented) */
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SI_MESGQ, /* sent by real time mesq state change
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(currently unimplemented) */
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SI_TIMER, /* sent by timer expiration */
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SI_QUEUE, /* sent by sigqueue (currently
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unimplemented) */
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SI_KERNEL, /* sent by system */
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ILL_ILLOPC, /* illegal opcode */
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ILL_ILLOPN, /* illegal operand */
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ILL_ILLADR, /* illegal addressing mode */
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ILL_ILLTRP, /* illegal trap*/
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ILL_PRVOPC, /* privileged opcode */
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ILL_PRVREG, /* privileged register */
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ILL_COPROC, /* coprocessor error */
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ILL_BADSTK, /* internal stack error */
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FPE_INTDIV, /* integer divide by zero */
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FPE_INTOVF, /* integer overflow */
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FPE_FLTDIV, /* floating point divide by zero */
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FPE_FLTOVF, /* floating point overflow */
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FPE_FLTUND, /* floating point underflow */
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FPE_FLTRES, /* floating point inexact result */
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FPE_FLTINV, /* floating point invalid operation */
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FPE_FLTSUB, /* subscript out of range */
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SEGV_MAPERR, /* address not mapped to object */
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SEGV_ACCERR, /* invalid permissions for mapped object */
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BUS_ADRALN, /* invalid address alignment. */
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BUS_ADRERR, /* non-existant physical address. */
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BUS_OBJERR, /* object specific hardware error. */
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CLD_EXITED, /* child has exited */
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CLD_KILLED, /* child was killed */
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CLD_DUMPED, /* child terminated abnormally */
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CLD_TRAPPED, /* traced child has trapped */
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CLD_STOPPED, /* child has stopped */
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CLD_CONTINUED /* stopped child has continued */
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};
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enum
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{
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SIGEV_SIGNAL = 0, /* a queued signal, with an application
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defined value, is generated when the
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event of interest occurs */
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SIGEV_NONE, /* no asynchronous notification is
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delivered when the event of interest
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occurs */
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SIGEV_THREAD /* a notification function is called to
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perform notification */
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};
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typedef void (*_sig_func_ptr)(int);
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struct sigaction
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{
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union
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{
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_sig_func_ptr sa_handler; /* SIG_DFL, SIG_IGN, or pointer to a function */
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void (*sa_sigaction) ( int, siginfo_t *, void * );
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};
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sigset_t sa_mask;
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int sa_flags;
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};
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#define SA_NOCLDSTOP 1 /* Do not generate SIGCHLD when children
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stop */
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#define SA_SIGINFO 2 /* Invoke the signal catching function
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with three arguments instead of one
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*/
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#define SA_RESTART 0x10000000 /* Restart syscall on signal return */
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#define SA_NODEFER 0x40000000 /* Don't automatically block the signal
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when its handler is being executed */
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#define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler */
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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 SIGABRT 6 /* used by abort */
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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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/* Real-Time signals per SUSv3. RT_SIGMAX is defined as 8 in limits.h */
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#define SIGRTMIN 32
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#define SIGRTMAX ((SIGRTMIN) + 0)
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#define NSIG 33 /* signal 0 implied */
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int sigwait (const sigset_t *, int *);
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int sigwaitinfo (const sigset_t *, siginfo_t *);
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int sighold (int);
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int sigqueue(pid_t, int, const union sigval);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_CYGWIN_SIGNAL_H*/
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