87 lines
3.0 KiB
C
87 lines
3.0 KiB
C
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/****************************************************************************
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* netutils/thttpd/fdwatch.h
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Derived from the file of the same name in THTTPD:
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*
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* Copyright <EFBFBD> 1999 by Jef Poskanzer <jef@mail.acme.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#ifndef __NETUTILS_THTTPD_FDWATCH_H
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#define __NETUTILS_THTTPD_FDWATCH_H
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#define FDW_READ 0
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#define FDW_WRITE 1
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#ifndef INFTIM
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# define INFTIM -1
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#endif
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/* Figure out how many file descriptors the system allows, and
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* initialize the fdwatch data structures. Returns -1 on failure.
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*/
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extern int fdwatch_get_nfiles(void);
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/* Add a descriptor to the watch list. rw is either FDW_READ or FDW_WRITE. */
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extern void fdwatch_add_fd(int fd, void *client_data, int rw);
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/* Delete a descriptor from the watch list. */
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extern void fdwatch_del_fd(int fd);
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/* Do the watch. Return value is the number of descriptors that are ready,
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* or 0 if the timeout expired, or -1 on errors. A timeout of INFTIM means
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* wait indefinitely.
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*/
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extern int fdwatch(long timeout_msecs);
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/* Check if a descriptor was ready. */
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extern int fdwatch_check_fd(int fd);
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/* Get the client data for the next returned event. Returns -1 when there
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* are no more events.
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*/
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extern void *fdwatch_get_next_client_data(void);
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/* Generate debugging statistics syslog message. */
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extern void fdwatch_logstats(long secs);
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#endif /* __NETUTILS_THTTPD_FDWATCH_H */
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