Markus Armbruster
8a1d9fbb4b
LWP's use of sigset_t is problematic. To iterate over a sigset_t, it uses NSIG, which is not portable: BSD and System V provide it, but it's not POSIX. To record signals caught, it updates a sigset_t variable from a signal handler. The variable isn't volatile, because we'd have to cast away volatile for sigaddset(). Replace sigset_t by an array of signal numbers terminated with 0. Since lwpInitSigWait() needs to store the signal set for lwpCatchAwaitedSig() anyway, there is no need to pass it to lwpSigWait(). Drop its parameter. Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1994-2020, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure, Markus Armbruster
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* Copyright (C) 1991-3 Stephen Crane
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*
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* Empire is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* lwpint.h: lwp internal structures
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*
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* Known contributors to this file:
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* Markus Armbruster, 2004-2020
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*/
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#ifndef LWPINT_H
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#define LWPINT_H
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#include <time.h>
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#include <ucontext.h>
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#include "misc.h"
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/* process control block. do *not* change the position of context */
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struct lwpProc {
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ucontext_t context; /* context structure */
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void *sbtm; /* stack buffer attached to it */
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int size; /* size of stack buffer */
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char *ustack; /* lowest usable stack address */
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int usize; /* size of usable stack */
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void (*entry)(void *); /* entry point */
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int dead; /* whether the process can be rescheduled */
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int pri; /* which scheduling queue we're on */
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time_t runtime; /* time at which process is restarted */
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int fd; /* fd we're blocking on */
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int fd_ready; /* woken up because fd was ready */
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int argc; /* initial arguments */
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char **argv;
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void *ud; /* user data */
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char *name; /* process name, for debugging */
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int flags;
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struct lwpProc *next;
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};
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/* queue */
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struct lwpQueue {
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struct lwpProc *head;
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struct lwpProc *tail;
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};
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#define LWP_REDZONE 1024 /* make this a multiple of 1024 */
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/* XXX Note that this assumes sizeof(int) == 4 */
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#define LWP_CHECKMARK 0x5a5a5a5a
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int lwpNewContext(struct lwpProc *);
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void lwpSwitchContext(struct lwpProc *, struct lwpProc *);
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void lwpAddTail(struct lwpQueue *, struct lwpProc *);
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struct lwpProc *lwpGetFirst(struct lwpQueue *);
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void lwpReady(struct lwpProc *);
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void lwpReschedule(void);
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void lwpEntryPoint(void);
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void lwpInitSelect(struct lwpProc *);
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void lwpWakeupSleep(void);
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void lwpSelect(void *);
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void lwpInitSigWait(int[]);
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void lwpSigWakeup(void);
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void lwpStatus(struct lwpProc *, char *, ...)
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ATTRIBUTE((format (printf, 2, 3)));
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#endif
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