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Ugghh, cvs add the functions necessary to lock the global signal action

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Mike Makonnen 2003-12-09 11:06:55 +00:00
parent 4a7709c540
commit 6fedbb4e37
1 changed files with 91 additions and 0 deletions
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lib/libthr/thread/thr_subr.c Normal file
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/*-
* Copyright (c) 2003 Michael Telahun Makonnen
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Problems/Questions to: Mike Makonnen <mtm@FreeBSD.Org>
*
* $FreeBSD$
*/
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <pthread.h>
#include "thr_private.h"
/*
* Lock for the process global signal actions list.
* This lock does NOT insure up-to-date-ness, only integrity.
*/
struct umtx sigactList_lock = UMTX_INITIALIZER;
/*
* proc_sigact_copyin(sig, actp)
* Copy the contents of actp into the process global
* action for signal sig.
*/
void
proc_sigact_copyin(int sig, const struct sigaction *actp)
{
UMTX_LOCK(&sigactList_lock);
bcopy((const void *)actp, (void *)&_thread_sigact[sig - 1],
sizeof(struct sigaction));
UMTX_UNLOCK(&sigactList_lock);
}
/*
* proc_sigact_copyout(sig, sigact)
* Copy the contents of the process global action for
* signal sig into sigact.
*/
void
proc_sigact_copyout(int sig, struct sigaction *actp)
{
UMTX_LOCK(&sigactList_lock);
bcopy((const void *)&_thread_sigact[sig - 1], (void *)actp,
sizeof(struct sigaction));
UMTX_UNLOCK(&sigactList_lock);
}
/*
* proc_sigact_sigaction(sig)
* Obtains the struct sigaction associated with signal sig.
* The address of the structure is the return value. It is
* upto the caller to check the value of the structure at
* that address against SIG_IGN and SIG_DFL before trying
* to dereference it.
*/
struct sigaction *
proc_sigact_sigaction(int sig)
{
struct sigaction *actp;
UMTX_LOCK(&sigactList_lock);
actp = &_thread_sigact[sig - 1];
UMTX_UNLOCK(&sigactList_lock);
return (actp);
}