1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (C) 2018 Universita` di Pisa
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 *   1. Redistributions of source code must retain the above copyright
12 *      notice, this list of conditions and the following disclaimer.
13 *   2. Redistributions in binary form must reproduce the above copyright
14 *      notice, this list of conditions and the following disclaimer in the
15 *      documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/types.h>
31#include <sys/stat.h>
32#include <sys/ioctl.h>
33#include <sys/mman.h>
34#include <fcntl.h>
35#include <stdlib.h>
36#include <stdio.h>
37#include <stdarg.h>
38#include <string.h>
39#include <unistd.h>
40#include <errno.h>
41#include <net/netmap_user.h>
42#include <pthread.h>
43#include "libnetmap.h"
44
45struct nmctx_pthread {
46	struct nmctx up;
47	pthread_mutex_t mutex;
48};
49
50static struct nmctx_pthread nmctx_pthreadsafe;
51
52static void
53nmctx_pthread_lock(struct nmctx *ctx, int lock)
54{
55	struct nmctx_pthread *ctxp =
56		(struct nmctx_pthread *)ctx;
57	if (lock) {
58		pthread_mutex_lock(&ctxp->mutex);
59	} else {
60		pthread_mutex_unlock(&ctxp->mutex);
61	}
62}
63
64void __attribute__ ((constructor))
65nmctx_set_threadsafe(void)
66{
67	struct nmctx *old;
68
69	pthread_mutex_init(&nmctx_pthreadsafe.mutex, NULL);
70	old = nmctx_set_default(&nmctx_pthreadsafe.up);
71	nmctx_pthreadsafe.up = *old;
72	nmctx_pthreadsafe.up.lock = nmctx_pthread_lock;
73}
74
75int nmctx_threadsafe;
76