284 lines
7.1 KiB
C
284 lines
7.1 KiB
C
/*-
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* Copyright (c) 2006 David Xu <davidxu@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/syscall.h>
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#include <sys/mqueue.h>
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#include "namespace.h"
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#include <errno.h>
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#include <pthread.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <signal.h>
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#include "sigev_thread.h"
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#include "un-namespace.h"
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extern int __sys_kmq_notify(int, const struct sigevent *);
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extern int __sys_kmq_open(const char *, int, mode_t,
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const struct mq_attr *);
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extern int __sys_kmq_setattr(int, const struct mq_attr *__restrict,
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struct mq_attr *__restrict);
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extern ssize_t __sys_kmq_timedreceive(int, char *__restrict, size_t,
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unsigned *__restrict, const struct timespec *__restrict);
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extern int __sys_kmq_timedsend(int, const char *, size_t, unsigned,
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const struct timespec *);
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extern int __sys_kmq_unlink(const char *);
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extern int __sys_close(int fd);
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struct __mq {
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int oshandle;
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struct sigev_node *node;
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};
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__weak_reference(__mq_open, mq_open);
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__weak_reference(__mq_open, _mq_open);
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__weak_reference(__mq_close, mq_close);
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__weak_reference(__mq_close, _mq_close);
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__weak_reference(__mq_notify, mq_notify);
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__weak_reference(__mq_notify, _mq_notify);
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__weak_reference(__mq_getattr, mq_getattr);
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__weak_reference(__mq_getattr, _mq_getattr);
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__weak_reference(__mq_setattr, mq_setattr);
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__weak_reference(__mq_setattr, _mq_setattr);
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__weak_reference(__mq_timedreceive_cancel, mq_timedreceive);
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__weak_reference(__mq_timedreceive, _mq_timedreceive);
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__weak_reference(__mq_timedsend_cancel, mq_timedsend);
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__weak_reference(__mq_timedsend, _mq_timedsend);
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__weak_reference(__mq_unlink, mq_unlink);
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__weak_reference(__mq_unlink, _mq_unlink);
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__weak_reference(__mq_send_cancel, mq_send);
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__weak_reference(__mq_send, _mq_send);
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__weak_reference(__mq_receive_cancel, mq_receive);
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__weak_reference(__mq_receive, _mq_receive);
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mqd_t
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__mq_open(const char *name, int oflag, mode_t mode,
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const struct mq_attr *attr)
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{
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struct __mq *mq;
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int err;
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mq = malloc(sizeof(struct __mq));
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if (mq == NULL)
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return (NULL);
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mq->oshandle = __sys_kmq_open(name, oflag, mode, attr);
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if (mq->oshandle != -1) {
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mq->node = NULL;
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return (mq);
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}
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err = errno;
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free(mq);
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errno = err;
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return ((mqd_t)-1L);
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}
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int
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__mq_close(mqd_t mqd)
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{
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int h;
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if (mqd->node != NULL) {
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__sigev_list_lock();
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__sigev_delete_node(mqd->node);
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__sigev_list_unlock();
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}
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h = mqd->oshandle;
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free(mqd);
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return (__sys_close(h));
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}
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typedef void (*mq_func)(union sigval val);
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static void
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mq_dispatch(struct sigev_node *sn)
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{
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mq_func f = sn->sn_func;
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/*
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* Check generation before calling user function,
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* this should avoid expired notification.
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*/
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if (sn->sn_gen == sn->sn_info.si_value.sival_int)
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f(sn->sn_value);
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}
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int
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__mq_notify(mqd_t mqd, const struct sigevent *evp)
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{
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struct sigevent ev;
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struct sigev_node *sn;
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int ret;
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if (evp == NULL || evp->sigev_notify != SIGEV_THREAD) {
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if (mqd->node != NULL) {
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__sigev_list_lock();
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__sigev_delete_node(mqd->node);
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mqd->node = NULL;
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__sigev_list_unlock();
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}
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return __sys_kmq_notify(mqd->oshandle, evp);
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}
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if (__sigev_check_init()) {
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/*
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* Thread library is not enabled.
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*/
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errno = EINVAL;
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return (-1);
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}
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sn = __sigev_alloc(SI_MESGQ, evp, mqd->node, 1);
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if (sn == NULL) {
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errno = EAGAIN;
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return (-1);
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}
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sn->sn_id = mqd->oshandle;
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sn->sn_dispatch = mq_dispatch;
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__sigev_get_sigevent(sn, &ev, sn->sn_gen);
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__sigev_list_lock();
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if (mqd->node != NULL)
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__sigev_delete_node(mqd->node);
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mqd->node = sn;
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__sigev_register(sn);
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ret = __sys_kmq_notify(mqd->oshandle, &ev);
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__sigev_list_unlock();
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return (ret);
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}
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int
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__mq_getattr(mqd_t mqd, struct mq_attr *attr)
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{
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return __sys_kmq_setattr(mqd->oshandle, NULL, attr);
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}
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int
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__mq_setattr(mqd_t mqd, const struct mq_attr *newattr, struct mq_attr *oldattr)
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{
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return __sys_kmq_setattr(mqd->oshandle, newattr, oldattr);
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}
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ssize_t
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__mq_timedreceive(mqd_t mqd, char *buf, size_t len,
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unsigned *prio, const struct timespec *timeout)
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{
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return __sys_kmq_timedreceive(mqd->oshandle, buf, len, prio, timeout);
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}
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ssize_t
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__mq_timedreceive_cancel(mqd_t mqd, char *buf, size_t len,
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unsigned *prio, const struct timespec *timeout)
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{
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int oldtype;
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int ret;
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_pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype);
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ret = __sys_kmq_timedreceive(mqd->oshandle, buf, len, prio, timeout);
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_pthread_setcanceltype(oldtype, NULL);
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return (ret);
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}
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ssize_t
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__mq_receive(mqd_t mqd, char *buf, size_t len, unsigned *prio)
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{
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return __sys_kmq_timedreceive(mqd->oshandle, buf, len, prio, NULL);
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}
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ssize_t
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__mq_receive_cancel(mqd_t mqd, char *buf, size_t len, unsigned *prio)
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{
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int oldtype;
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int ret;
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_pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype);
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ret = __sys_kmq_timedreceive(mqd->oshandle, buf, len, prio, NULL);
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_pthread_setcanceltype(oldtype, NULL);
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return (ret);
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}
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ssize_t
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__mq_timedsend(mqd_t mqd, char *buf, size_t len,
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unsigned prio, const struct timespec *timeout)
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{
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return __sys_kmq_timedsend(mqd->oshandle, buf, len, prio, timeout);
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}
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ssize_t
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__mq_timedsend_cancel(mqd_t mqd, char *buf, size_t len,
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unsigned prio, const struct timespec *timeout)
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{
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int oldtype;
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int ret;
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_pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype);
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ret = __sys_kmq_timedsend(mqd->oshandle, buf, len, prio, timeout);
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_pthread_setcanceltype(oldtype, NULL);
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return (ret);
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}
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ssize_t
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__mq_send(mqd_t mqd, char *buf, size_t len, unsigned prio)
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{
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return __sys_kmq_timedsend(mqd->oshandle, buf, len, prio, NULL);
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}
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ssize_t
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__mq_send_cancel(mqd_t mqd, char *buf, size_t len, unsigned prio)
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{
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int oldtype;
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int ret;
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_pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype);
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ret = __sys_kmq_timedsend(mqd->oshandle, buf, len, prio, NULL);
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_pthread_setcanceltype(oldtype, NULL);
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return (ret);
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}
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int
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__mq_unlink(const char *path)
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{
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return __sys_kmq_unlink(path);
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}
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int
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__mq_oshandle(mqd_t mqd)
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{
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return (mqd->oshandle);
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}
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