sys/sys/signal2.h

   1 /*
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)signalvar.h 8.6 (Berkeley) 2/19/95
  34  * $FreeBSD: src/sys/sys/signalvar.h,v 1.34.2.1 2000/05/16 06:58:05 dillon Exp $
  35  * $DragonFly: src/sys/sys/signal2.h,v 1.2 2008/01/24 22:35:14 nant Exp $
  36  */
  37
  38 #ifndef _SYS_SIGNAL2_H
  39 #define _SYS_SIGNAL2_H
  40
  41 #include <sys/proc.h>
  42
  43 /*
  44  * Inline functions:
  45  */
  46 /*
  47  * Determine which signals are pending for a lwp.
  48  */
  49 static __inline sigset_t
  50 lwp_sigpend(struct lwp *lp)
  51 {
  52         sigset_t set;
  53
  54         set = lp->lwp_proc->p_siglist;
  55         SIGSETOR(set, lp->lwp_siglist);
  56         return (set);
  57 }
  58
  59 /*
  60  * Mark a signal as handled by the lwp.
  61  */
  62 static __inline void
  63 lwp_delsig(struct lwp *lp, int sig)
  64 {
  65         SIGDELSET(lp->lwp_siglist, sig);
  66         SIGDELSET(lp->lwp_proc->p_siglist, sig);
  67 }
  68
  69 #define CURSIG(lp)      __cursig(lp)
  70 #define CURSIGNB(lp)    __cursignb(lp)
  71
  72 /*
  73  * Determine signal that should be delivered to process p, the current
  74  * process, 0 if none.  If there is a pending stop signal with default
  75  * action, the process stops in issignal().
  76  *
  77  * MP SAFE
  78  */
  79 static __inline
  80 int
  81 __cursig(struct lwp *lp)
  82 {
  83         struct proc *p;
  84         sigset_t tmpset;
  85         int r;
  86
  87         p = lp->lwp_proc;
  88         tmpset = lwp_sigpend(lp);
  89         SIGSETNAND(tmpset, lp->lwp_sigmask);
  90         if (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))
  91                 return(0);
  92         r = issignal(lp);
  93         return(r);
  94 }
  95
  96 static __inline
  97 int
  98 __cursignb(struct lwp *lp)
  99 {
 100         struct proc *p;
 101         sigset_t tmpset;
 102
 103         p = lp->lwp_proc;
 104         tmpset = lwp_sigpend(lp);
 105         SIGSETNAND(tmpset, lp->lwp_sigmask);
 106         if (SIGISEMPTY(tmpset))
 107                 return(FALSE);
 108         return (TRUE);
 109 }
 110
 111 #endif