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111 lines
4.2 KiB
111 lines
4.2 KiB
/**************************************************************************** |
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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 © 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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#ifndef __NETUTILS_THTTPD_FDWATCH_H |
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#define __NETUTILS_THTTPD_FDWATCH_H |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <stdint.h> |
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/**************************************************************************** |
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* Pre-Processor Definitions |
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****************************************************************************/ |
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/* Define to enable detailed FDWATCH debug output */ |
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#undef CONFIG_THTTPD_FDWATCH_DEBUG |
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#ifndef INFTIM |
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# define INFTIM -1 |
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#endif |
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/**************************************************************************** |
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* Private Types |
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****************************************************************************/ |
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struct fdwatch_s |
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{ |
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struct pollfd *pollfds; /* Poll data (allocated) */ |
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void **client; /* Client data (allocated) */ |
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uint8_t *ready; /* The list of fds with activity (allocated) */ |
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uint8_t nfds; /* The configured maximum number of fds */ |
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uint8_t nwatched; /* The number of fds currently watched */ |
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uint8_t nactive; /* The number of fds with activity */ |
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uint8_t next; /* The index to the next client data */ |
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}; |
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/**************************************************************************** |
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* Public Function Prototypes |
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****************************************************************************/ |
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/* Initialize the fdwatch data structures. Returns NULL on failure. */ |
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extern struct fdwatch_s *fdwatch_initialize(int nfds); |
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/* Uninitialize the fwdatch data structure */ |
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extern void fdwatch_uninitialize(struct fdwatch_s *fw); |
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/* Add a descriptor to the watch list */ |
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extern void fdwatch_add_fd(struct fdwatch_s *fw, int fd, void *client_data); |
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/* Delete a descriptor from the watch list. */ |
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extern void fdwatch_del_fd(struct fdwatch_s *fw, 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(struct fdwatch_s *fw, long timeout_msecs); |
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/* Check if a descriptor was ready. */ |
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extern int fdwatch_check_fd(struct fdwatch_s *fw, 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(struct fdwatch_s *fw); |
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#endif /* __NETUTILS_THTTPD_FDWATCH_H */ |
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