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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 1.3 2008/10/14 21:25:14 swildner Exp $
38 #ifndef _SYS_SIGNAL2_H
39 #define _SYS_SIGNAL2_H
47 * Determine which signals are pending for a lwp.
49 * (Does not need to be interlocked with lwp_spin. If caller holds a
50 * critical section races will be resolved through an AST).
52 static __inline sigset_t
53 lwp_sigpend(struct lwp *lp)
57 set = lp->lwp_proc->p_siglist;
58 SIGSETOR(set, lp->lwp_siglist);
63 * Mark a signal as handled by the lwp.
65 * (p->p_token must be held, lp->lwp_spin must be held)
68 lwp_delsig(struct lwp *lp, int sig)
70 SIGDELSET(lp->lwp_siglist, sig);
71 SIGDELSET(lp->lwp_proc->p_siglist, sig);
74 #define CURSIG(lp) __cursig(lp, 1, 0)
75 #define CURSIG_TRACE(lp) __cursig(lp, 1, 1)
76 #define CURSIG_NOBLOCK(lp) __cursig(lp, 0, 0)
79 * Determine signal that should be delivered to process p, the current
80 * process, 0 if none. If there is a pending stop signal with default
81 * action, the process stops in issignal().
83 * This function does not interlock pending signals. If the caller needs
84 * to interlock the caller must acquire the per-proc token.
90 __cursig(struct lwp *lp, int mayblock, int maytrace)
92 struct proc *p = lp->lwp_proc;
96 tmpset = lwp_sigpend(lp);
97 SIGSETNAND(tmpset, lp->lwp_sigmask);
99 /* Nothing interesting happening? */
100 if (SIGISEMPTY(tmpset)) {
103 * a) we may block and
104 * b) somebody is tracing us.
106 if (!(mayblock && (p->p_flags & P_TRACED)))
111 r = issignal(lp, maytrace);
113 r = TRUE; /* simply state the fact */