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 * $FreeBSD$ 30 */ 31 32 #include <sys/types.h> 33 #include <sys/stat.h> 34 #include <sys/ioctl.h> 35 #include <sys/mman.h> 36 #include <fcntl.h> 37 #include <stdlib.h> 38 #include <stdio.h> 39 #include <stdarg.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <errno.h> 43 #include <net/netmap_user.h> 44 #include <pthread.h> 45 #include "libnetmap.h" 46 47 struct nmctx_pthread { 48 struct nmctx up; 49 pthread_mutex_t mutex; 50 }; 51 52 static struct nmctx_pthread nmctx_pthreadsafe; 53 54 static void 55 nmctx_pthread_lock(struct nmctx *ctx, int lock) 56 { 57 struct nmctx_pthread *ctxp = 58 (struct nmctx_pthread *)ctx; 59 if (lock) { 60 pthread_mutex_lock(&ctxp->mutex); 61 } else { 62 pthread_mutex_unlock(&ctxp->mutex); 63 } 64 } 65 66 void __attribute__ ((constructor)) 67 nmctx_set_threadsafe(void) 68 { 69 struct nmctx *old; 70 71 pthread_mutex_init(&nmctx_pthreadsafe.mutex, NULL); 72 old = nmctx_set_default(&nmctx_pthreadsafe.up); 73 nmctx_pthreadsafe.up = *old; 74 nmctx_pthreadsafe.up.lock = nmctx_pthread_lock; 75 } 76 77 int nmctx_threadsafe; 78