diff options
Diffstat (limited to 'mit-pthreads/net/net_internal.c')
| -rw-r--r-- | mit-pthreads/net/net_internal.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/mit-pthreads/net/net_internal.c b/mit-pthreads/net/net_internal.c new file mode 100644 index 00000000000..2c25ff76693 --- /dev/null +++ b/mit-pthreads/net/net_internal.c @@ -0,0 +1,78 @@ +/* + * Copyright (c) 1985 Regents of the University of California. + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +/*static char *sccsid = "from: @(#)net_internal.c 6.22 (Berkeley) 3/19/91";*/ +static char *rcsid = "$Id$"; +#endif /* LIBC_SCCS and not lint */ + +#include <pthread.h> +#include <stdio.h> +#include <stdlib.h> +#include "net_internal.h" + +static void _net_init_global(void); + +pthread_mutex_t net_iterate_lock = PTHREAD_MUTEX_INITIALIZER; +static pthread_once_t init_once = PTHREAD_ONCE_INIT; +static pthread_key_t key; +static int init_status; + +/* Performs global initialization. */ +char *_net_buf() +{ + char *buf; + + /* Make sure the global initializations have been done. */ + pthread_once(&init_once, _net_init_global); + + /* Initialize thread-specific data for this thread if it hasn't + * been done already. */ + buf = (char *) pthread_getspecific(key); + if (!buf) { + buf = (char *) malloc(NET_BUFSIZE); + if (buf == NULL) + return NULL; + if (pthread_setspecific(key, buf) < 0) { + free(buf); + return NULL; + } + } + return buf; +} + +static void _net_init_global() +{ + init_status = pthread_key_create(&key, free); +} + |