Resync new repository with old repo r5166

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
2026-10-23 22:53:34 +08:00 · 2012-09-17 18:18:44 +00:00
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+/****************************************************************************
+ * netutils/thttpd/fdwatch.h
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 */
+