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retry.h
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retry.h
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/* retry.h -- Keep retrying write system calls
*
* Copyright (c) 1994-2008 Carnegie Mellon University. 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. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any legal
* details, please contact
* Carnegie Mellon University
* Center for Technology Transfer and Enterprise Creation
* 4615 Forbes Avenue
* Suite 302
* Pittsburgh, PA 15213
* (412) 268-7393, fax: (412) 268-7395
* innovation@andrew.cmu.edu
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* $Id: retry.h,v 1.15 2010/01/06 17:01:47 murch Exp $
*/
#ifndef INCLUDED_RETRY_H
#define INCLUDED_RETRY_H
#ifndef P
#ifdef __STDC__
#define P(x) x
#else
#define P(x) ()
#endif
#endif
#include <sys/uio.h>
#include "xmalloc.h"
extern ssize_t retry_read P((int fd, void *buf, size_t nbyte));
extern ssize_t retry_write P((int fd, const void *buf, size_t nbyte));
extern ssize_t retry_writev P((int fd, const struct iovec *iov, int iovcnt));
/* add a buffer 's' of length 'len' to iovec 'iov' */
#define WRITEV_ADD_TO_IOVEC(iov, num_iov, s, len) \
do { (iov)[(num_iov)].iov_base = (char *)(s); \
(iov)[(num_iov)++].iov_len = (len); } while (0)
/* add a string 's' to iovec 'iov' */
#define WRITEV_ADDSTR_TO_IOVEC(iov, num_iov, s) WRITEV_ADD_TO_IOVEC(iov, num_iov, s, strlen(s))
#endif /* INCLUDED_RETRY_H */

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