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29 * @(#)signalvar.h 8.6 (Berkeley) 2/19/95
30 * $FreeBSD: src/sys/sys/signalvar.h,v 1.34.2.1 2000/05/16 06:58:05 dillon Exp $
31 * $DragonFly: src/sys/sys/signal2.h,v 1.3 2008/10/14 21:25:14 swildner Exp $
34 #ifndef _SYS_SIGNAL2_H
35 #define _SYS_SIGNAL2_H
43 * Determine which signals are pending for a lwp.
45 * (Does not need to be interlocked with lwp_spin. If caller holds a
46 * critical section races will be resolved through an AST).
48 static __inline sigset_t
49 lwp_sigpend(struct lwp *lp)
53 set = lp->lwp_proc->p_siglist;
54 SIGSETOR(set, lp->lwp_siglist);
60 * Mark a signal as handled by the lwp.
62 * (p->p_token must be held, lp->lwp_spin must be held)
65 lwp_delsig(struct lwp *lp, int sig, int fromproc)
67 SIGDELSET(lp->lwp_siglist, sig);
69 SIGDELSET_ATOMIC(lp->lwp_proc->p_siglist, sig);
72 #define CURSIG(lp) __cursig(lp, 1, 0, NULL)
73 #define CURSIG_TRACE(lp) __cursig(lp, 1, 1, NULL)
74 #define CURSIG_LCK_TRACE(lp, ptok) __cursig(lp, 1, 1, ptok)
75 #define CURSIG_NOBLOCK(lp) __cursig(lp, 0, 0, NULL)
78 * Determine signal that should be delivered to process p, the current
79 * process, 0 if none. If there is a pending stop signal with default
80 * action, the process stops in issignal().
82 * This function does not interlock pending signals. If the caller needs
83 * to interlock the caller must acquire the per-proc token.
85 * If ptok is non-NULL this function may return with proc->p_token held,
86 * indicating that the signal came from the process structure. This is
87 * used by postsig to avoid holding p_token when possible. Only applicable
88 * if mayblock is non-zero.
92 __cursig(struct lwp *lp, int mayblock, int maytrace, int *ptok)
94 struct proc *p = lp->lwp_proc;
98 tmpset = lwp_sigpend(lp);
99 SIGSETNAND(tmpset, lp->lwp_sigmask);
101 /* Nothing interesting happening? */
102 if (SIGISEMPTY(tmpset)) {
105 * a) we may block and
106 * b) somebody is tracing us.
108 if (!(mayblock && (p->p_flags & P_TRACED)))
113 r = issignal(lp, maytrace, ptok);
115 r = TRUE; /* simply state the fact */