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/*
 * Copyright (c) 2007-2009 Niels Provos and Nick Mathewson
 *
 * 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 of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */
#ifndef _EVENT_UTIL_INTERNAL_H
#define _EVENT_UTIL_INTERNAL_H

#include "event-config.h"
#include <errno.h>

#ifdef __cplusplus
extern "C" {
#endif

/* Internal use only: macros to match patterns of error codes in a
   cross-platform way.  We need these macros because of two historical
   reasons: first, nonblocking IO functions are generally written to give an
   error on the "blocked now, try later" case, so sometimes an error from a
   read, write, connect, or accept means "no error; just wait for more
   data," and we need to look at the error code.  Second, Windows defines
   a different set of error codes for sockets. */

#ifndef WIN32

/* True iff e is an error that means a read/write operation can be retried. */
#define EVUTIL_ERR_RW_RETRIABLE(e)				\
	((e) == EINTR || (e) == EAGAIN)
/* True iff e is an error that means an accept can be retried. */
#define EVUTIL_ERR_CONNECT_RETRIABLE(e)			\
	((e) == EINTR || (e) == EINPROGRESS)
/* True iff e is an error that means a connect can be retried. */
#define EVUTIL_ERR_ACCEPT_RETRIABLE(e)			\
	((e) == EINTR || (e) == EAGAIN || (e) == ECONNABORTED)

#else

#define EVUTIL_ERR_RW_RETRIABLE(e)								\
	((e) == WSAEWOULDBLOCK ||									\
	 (e) == WSAEINTR)

#define EVUTIL_ERR_CONNECT_RETRIABLE(e)			\
	((e) == WSAEWOULDBLOCK ||					\
	 (e) == WSAEINTR ||							\
	 (e) == WSAEINPROGRESS ||					\
	 (e) == WSAEINVAL)

#define EVUTIL_ERR_ACCEPT_RETRIABLE(e)			\
	EVUTIL_ERR_RW_RETRIABLE(e)

#endif

#ifdef _EVENT_socklen_t
#define socklen_t _EVENT_socklen_t
#endif

#ifdef __cplusplus
}
#endif

#endif
kc3-lang/libevent/util-internal.h

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util-internal.h
