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Diffstat (limited to 'apps/netutils/thttpd/fdwatch.h')
-rw-r--r-- | apps/netutils/thttpd/fdwatch.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/apps/netutils/thttpd/fdwatch.h b/apps/netutils/thttpd/fdwatch.h new file mode 100644 index 000000000..e60727db1 --- /dev/null +++ b/apps/netutils/thttpd/fdwatch.h @@ -0,0 +1,111 @@ +/**************************************************************************** + * netutils/thttpd/fdwatch.h + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Derived from the file of the same name in THTTPD: + * + * Copyright © 1999 by Jef Poskanzer <jef@mail.acme.com>. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + * + ****************************************************************************/ + +#ifndef __NETUTILS_THTTPD_FDWATCH_H +#define __NETUTILS_THTTPD_FDWATCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <stdint.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/* Define to enable detailed FDWATCH debug output */ + +#undef CONFIG_THTTPD_FDWATCH_DEBUG + +#ifndef INFTIM +# define INFTIM -1 +#endif + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct fdwatch_s +{ + struct pollfd *pollfds; /* Poll data (allocated) */ + void **client; /* Client data (allocated) */ + uint8_t *ready; /* The list of fds with activity (allocated) */ + uint8_t nfds; /* The configured maximum number of fds */ + uint8_t nwatched; /* The number of fds currently watched */ + uint8_t nactive; /* The number of fds with activity */ + uint8_t next; /* The index to the next client data */ +}; + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +/* Initialize the fdwatch data structures. Returns NULL on failure. */ + +extern struct fdwatch_s *fdwatch_initialize(int nfds); + +/* Uninitialize the fwdatch data structure */ + +extern void fdwatch_uninitialize(struct fdwatch_s *fw); + +/* Add a descriptor to the watch list */ + +extern void fdwatch_add_fd(struct fdwatch_s *fw, int fd, void *client_data); + +/* Delete a descriptor from the watch list. */ + +extern void fdwatch_del_fd(struct fdwatch_s *fw, int fd); + +/* Do the watch. Return value is the number of descriptors that are ready, + * or 0 if the timeout expired, or -1 on errors. A timeout of INFTIM means + * wait indefinitely. + */ + +extern int fdwatch(struct fdwatch_s *fw, long timeout_msecs); + +/* Check if a descriptor was ready. */ + +extern int fdwatch_check_fd(struct fdwatch_s *fw, int fd); + +/* Get the client data for the next returned event. Returns -1 when there + * are no more events. + */ + +extern void *fdwatch_get_next_client_data(struct fdwatch_s *fw); + +#endif /* __NETUTILS_THTTPD_FDWATCH_H */ + |