freebsd-dev/lib/libnetmap/nmctx-pthreads.c
Vincenzo Maffione 4c067f3842 lib: libnetmap: add missing copyright headers
MFC after:	2 weeks
2020-09-01 06:06:32 +00:00

78 lines
2.3 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2018 Universita` di Pisa
* 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <net/netmap_user.h>
#include <pthread.h>
#include "libnetmap.h"
struct nmctx_pthread {
struct nmctx up;
pthread_mutex_t mutex;
};
static struct nmctx_pthread nmctx_pthreadsafe;
static void
nmctx_pthread_lock(struct nmctx *ctx, int lock)
{
struct nmctx_pthread *ctxp =
(struct nmctx_pthread *)ctx;
if (lock) {
pthread_mutex_lock(&ctxp->mutex);
} else {
pthread_mutex_unlock(&ctxp->mutex);
}
}
void __attribute__ ((constructor))
nmctx_set_threadsafe(void)
{
struct nmctx *old;
pthread_mutex_init(&nmctx_pthreadsafe.mutex, NULL);
old = nmctx_set_default(&nmctx_pthreadsafe.up);
nmctx_pthreadsafe.up = *old;
nmctx_pthreadsafe.up.lock = nmctx_pthread_lock;
}
int nmctx_threadsafe;