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cups/cups-avahi-4-poll.patch

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diff -up cups-1.5.2/scheduler/avahi.c.avahi-4-poll cups-1.5.2/scheduler/avahi.c
--- cups-1.5.2/scheduler/avahi.c.avahi-4-poll 2012-03-14 15:07:29.477542381 +0000
+++ cups-1.5.2/scheduler/avahi.c 2012-03-14 15:07:29.477542381 +0000
@@ -0,0 +1,441 @@
+/*
+ * "$Id$"
+ *
+ * Avahi poll implementation for the CUPS scheduler.
+ *
+ * Copyright (C) 2010, 2011 Red Hat, Inc.
+ * Authors:
+ * Tim Waugh <twaugh@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT HOLDERS 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.
+ *
+ * Contents:
+ *
+ * watch_read_cb - Read callback for file descriptor
+ * watch_write_cb - Write callback for file descriptor
+ * watched_fd_add_select() - Call cupsdAddSelect() as needed
+ * watch_new() - Create a new file descriptor watch
+ * watch_free() - Free a file descriptor watch
+ * watch_update() - Update watched events for a file descriptor
+ * watch_get_events() - Get events that happened for a file descriptor
+ * timeout_cb() - Run a timed Avahi callback
+ * timeout_new() - Set a wakeup time
+ * timeout_update() - Update the expiration time for a timeout
+ * timeout_free() - Free a timeout
+ * compare_watched_fds() - Compare watched file descriptors for array sorting
+ * avahi_cups_poll_new() - Create a new Avahi main loop object for CUPS
+ * avahi_cups_poll_free() - Free an Avahi main loop object for CUPS
+ * avahi_cups_poll_get() - Get the abstract poll API structure
+ */
+
+#include <config.h>
+
+#ifdef HAVE_AVAHI /* Applies to entire file... */
+
+/*
+ * Include necessary headers...
+ */
+
+#include "cupsd.h"
+
+#if defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
+# include <malloc.h>
+#endif /* HAVE_MALLOC_H && HAVE_MALLINFO */
+
+#ifdef HAVE_AVAHI
+# include <avahi-common/timeval.h>
+#endif /* HAVE_AVAHI */
+
+
+typedef struct
+{
+ AvahiCupsPoll *cups_poll;
+
+ int fd;
+ AvahiWatchEvent occurred;
+ cups_array_t *watches;
+} cupsd_watched_fd_t;
+
+struct AvahiWatch
+{
+ cupsd_watched_fd_t *watched_fd;
+
+ AvahiWatchEvent events;
+ AvahiWatchCallback callback;
+ void *userdata;
+};
+
+struct AvahiTimeout
+{
+ AvahiCupsPoll *cups_poll;
+ AvahiTimeoutCallback callback;
+ void *userdata;
+ cupsd_timeout_t *cupsd_timeout;
+};
+
+/*
+ * Local functions...
+ */
+
+static AvahiWatch * watch_new(const AvahiPoll *api,
+ int fd,
+ AvahiWatchEvent events,
+ AvahiWatchCallback callback,
+ void *userdata);
+static void watch_free(AvahiWatch *watch);
+static void watch_update(AvahiWatch *watch,
+ AvahiWatchEvent events);
+static AvahiWatchEvent watch_get_events(AvahiWatch *watch);
+
+
+/*
+ * 'watch_read_cb' - Read callback for file descriptor
+ */
+
+static void
+watch_read_cb (void *userdata)
+{
+ AvahiWatch *watch;
+ cupsd_watched_fd_t *watched_fd = userdata;
+ watched_fd->occurred |= AVAHI_WATCH_IN;
+ for (watch = (AvahiWatch *)cupsArrayFirst(watched_fd->watches);
+ watch;
+ watch = (AvahiWatch *)cupsArrayNext(watched_fd->watches))
+ {
+ if (watch->events & watched_fd->occurred)
+ {
+ (watch->callback) (watch, watched_fd->fd,
+ AVAHI_WATCH_IN, watch->userdata);
+ watched_fd->occurred &= ~AVAHI_WATCH_IN;
+ break;
+ }
+ }
+}
+
+
+/*
+ * 'watch_write_cb' - Write callback for file descriptor
+ */
+
+static void
+watch_write_cb (void *userdata)
+{
+ AvahiWatch *watch;
+ cupsd_watched_fd_t *watched_fd = userdata;
+ watched_fd->occurred |= AVAHI_WATCH_OUT;
+ for (watch = (AvahiWatch *)cupsArrayFirst(watched_fd->watches);
+ watch;
+ watch = (AvahiWatch *)cupsArrayNext(watched_fd->watches))
+ {
+ if (watch->events & watched_fd->occurred)
+ {
+ (watch->callback) (watch, watched_fd->fd,
+ AVAHI_WATCH_OUT, watch->userdata);
+ watched_fd->occurred &= ~AVAHI_WATCH_OUT;
+ break;
+ }
+ }
+}
+
+
+/*
+ * 'watched_fd_add_select' - Call cupsdAddSelect() as needed
+ */
+
+static int /* O - Watches? */
+watched_fd_add_select (cupsd_watched_fd_t *watched_fd)
+{
+ AvahiWatch *watch;
+ cupsd_selfunc_t read_cb = NULL, write_cb = NULL;
+ int any_watches = 0;
+
+ for (watch = (AvahiWatch *)cupsArrayFirst(watched_fd->watches);
+ watch;
+ watch = (AvahiWatch *)cupsArrayNext(watched_fd->watches))
+ {
+ any_watches = 1;
+ if (watch->events & (AVAHI_WATCH_IN |
+ AVAHI_WATCH_ERR |
+ AVAHI_WATCH_HUP))
+ {
+ read_cb = (cupsd_selfunc_t)watch_read_cb;
+ if (write_cb != NULL)
+ break;
+ }
+
+ if (watch->events & AVAHI_WATCH_OUT)
+ {
+ write_cb = (cupsd_selfunc_t)watch_write_cb;
+ if (read_cb != NULL)
+ break;
+ }
+ }
+
+ if (read_cb || write_cb)
+ cupsdAddSelect (watched_fd->fd, read_cb, write_cb, watched_fd);
+ else
+ cupsdRemoveSelect (watched_fd->fd);
+
+ return (any_watches);
+}
+
+/*
+ * 'watch_new' - Create a new file descriptor watch
+ */
+
+static AvahiWatch *
+watch_new (const AvahiPoll *api,
+ int fd,
+ AvahiWatchEvent events,
+ AvahiWatchCallback callback,
+ void *userdata)
+{
+ cupsd_watched_fd_t key, *watched_fd;
+ AvahiCupsPoll *cups_poll = api->userdata;
+ AvahiWatch *watch = malloc(sizeof(AvahiWatch));
+ if (watch == NULL)
+ return (NULL);
+
+ watch->events = events;
+ watch->callback = callback;
+ watch->userdata = userdata;
+
+ key.fd = fd;
+ watched_fd = cupsArrayFind (cups_poll->watched_fds, &key);
+ if (watched_fd == NULL)
+ {
+ watched_fd = malloc(sizeof(cupsd_watched_fd_t));
+ if (watched_fd == NULL)
+ {
+ free (watch);
+ return (NULL);
+ }
+
+ watched_fd->fd = fd;
+ watched_fd->occurred = 0;
+ watched_fd->cups_poll = cups_poll;
+ watched_fd->watches = cupsArrayNew (NULL, NULL);
+ cupsArrayAdd (cups_poll->watched_fds, watched_fd);
+ }
+
+ watch->watched_fd = watched_fd;
+ cupsArrayAdd(watched_fd->watches, watch);
+ watched_fd_add_select (watched_fd);
+ return (watch);
+}
+
+
+/*
+ * 'watch_free' - Free a file descriptor watch
+ */
+
+static void
+watch_free (AvahiWatch *watch)
+{
+ cupsd_watched_fd_t *watched_fd = watch->watched_fd;
+ AvahiCupsPoll *cups_poll = watched_fd->cups_poll;
+
+ cupsArrayRemove (watched_fd->watches, watch);
+ free (watch);
+
+ if (!watched_fd_add_select (watched_fd))
+ {
+ /* No more watches */
+ cupsArrayRemove (cups_poll->watched_fds, watched_fd);
+ free (watched_fd);
+ }
+}
+
+
+/*
+ * 'watch_update' - Update watched events for a file descriptor
+ */
+
+static void
+watch_update (AvahiWatch *watch,
+ AvahiWatchEvent events)
+{
+ watch->events = events;
+ watched_fd_add_select (watch->watched_fd);
+}
+
+
+/*
+ * 'watch_get_events' - Get events that happened for a file descriptor
+ */
+
+static AvahiWatchEvent
+watch_get_events (AvahiWatch *watch)
+{
+ return (watch->watched_fd->occurred);
+}
+
+
+/*
+ * 'timeout_cb()' - Run a timed Avahi callback
+ */
+
+static void
+timeout_cb (cupsd_timeout_t *cupsd_timeout, void *userdata)
+{
+ AvahiTimeout *timeout = userdata;
+ (timeout->callback) (timeout, timeout->userdata);
+}
+
+
+/*
+ * 'timeout_new' - Set a wakeup time
+ */
+
+static AvahiTimeout *
+timeout_new (const AvahiPoll *api,
+ const struct timeval *tv,
+ AvahiTimeoutCallback callback,
+ void *userdata)
+{
+ AvahiTimeout *timeout;
+ AvahiCupsPoll *cups_poll = api->userdata;
+
+ timeout = malloc(sizeof(AvahiTimeout));
+ if (timeout == NULL)
+ return (NULL);
+
+ timeout->cups_poll = cups_poll;
+ timeout->callback = callback;
+ timeout->userdata = userdata;
+ timeout->cupsd_timeout = cupsdAddTimeout (tv,
+ (cupsd_timeoutfunc_t)timeout_cb,
+ timeout);
+ cupsArrayAdd (cups_poll->timeouts, timeout);
+ return (timeout);
+}
+
+
+/*
+ * 'timeout_update' - Update the expiration time for a timeout
+ */
+
+static void
+timeout_update (AvahiTimeout *timeout,
+ const struct timeval *tv)
+{
+ cupsdUpdateTimeout (timeout->cupsd_timeout, tv);
+}
+
+
+/*
+ * ' timeout_free' - Free a timeout
+ */
+
+static void
+timeout_free (AvahiTimeout *timeout)
+{
+ cupsArrayRemove (timeout->cups_poll->timeouts, timeout);
+ cupsdRemoveTimeout (timeout->cupsd_timeout);
+ free (timeout);
+}
+
+
+/*
+ * 'compare_watched_fds' - Compare watched file descriptors for array sorting
+ */
+static int
+compare_watched_fds(cupsd_watched_fd_t *p0,
+ cupsd_watched_fd_t *p1)
+{
+ /*
+ * Compare by fd (no two elements have the same fd)
+ */
+
+ if (p0->fd == p1->fd)
+ return 0;
+
+ return (p0->fd < p1->fd ? -1 : 1);
+}
+
+
+/*
+ * 'avahi_cups_poll_new' - Create a new Avahi main loop object for CUPS
+ */
+
+AvahiCupsPoll *
+avahi_cups_poll_new (void)
+{
+ AvahiCupsPoll *cups_poll = malloc(sizeof(AvahiCupsPoll));
+ if (cups_poll == NULL)
+ return (NULL);
+
+ cups_poll->watched_fds = cupsArrayNew ((cups_array_func_t)compare_watched_fds,
+ NULL);
+ cups_poll->timeouts = cupsArrayNew (NULL, NULL);
+
+ cups_poll->api.userdata = cups_poll;
+ cups_poll->api.watch_new = watch_new;
+ cups_poll->api.watch_free = watch_free;
+ cups_poll->api.watch_update = watch_update;
+ cups_poll->api.watch_get_events = watch_get_events;
+
+ cups_poll->api.timeout_new = timeout_new;
+ cups_poll->api.timeout_update = timeout_update;
+ cups_poll->api.timeout_free = timeout_free;
+
+ return (cups_poll);
+}
+
+
+/*
+ * 'avahi_cups_poll_free' - Free an Avahi main loop object for CUPS
+ */
+void
+avahi_cups_poll_free (AvahiCupsPoll *cups_poll)
+{
+ cupsd_watched_fd_t *watched_fd;
+
+ for (watched_fd = (cupsd_watched_fd_t*)cupsArrayFirst(cups_poll->watched_fds);
+ watched_fd;
+ watched_fd = (cupsd_watched_fd_t*)cupsArrayNext(cups_poll->watched_fds))
+ cupsArrayClear (watched_fd->watches);
+
+ cupsArrayClear (cups_poll->watched_fds);
+ cupsArrayClear (cups_poll->timeouts);
+}
+
+
+/*
+ * 'avahi_cups_poll_get' - Get the abstract poll API structure
+ */
+
+const AvahiPoll *
+avahi_cups_poll_get (AvahiCupsPoll *cups_poll)
+{
+ return (&cups_poll->api);
+}
+
+
+#endif /* HAVE_AVAHI ... from top of file */
+
+/*
+ * End of "$Id$".
+ */
diff -up cups-1.5.2/scheduler/avahi.h.avahi-4-poll cups-1.5.2/scheduler/avahi.h
--- cups-1.5.2/scheduler/avahi.h.avahi-4-poll 2012-03-14 15:07:29.477542381 +0000
+++ cups-1.5.2/scheduler/avahi.h 2012-03-14 15:07:29.477542381 +0000
@@ -0,0 +1,69 @@
+/*
+ * "$Id$"
+ *
+ * Avahi poll implementation for the CUPS scheduler.
+ *
+ * Copyright (C) 2010, 2011 Red Hat, Inc.
+ * Authors:
+ * Tim Waugh <twaugh@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT HOLDERS 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.
+ */
+
+#include <config.h>
+
+#ifdef HAVE_AVAHI
+# include <avahi-client/client.h>
+# include <avahi-client/publish.h>
+#endif /* HAVE_AVAHI */
+
+#ifdef HAVE_AUTHORIZATION_H
+# include <Security/Authorization.h>
+#endif /* HAVE_AUTHORIZATION_H */
+
+
+#ifdef HAVE_AVAHI
+typedef struct
+{
+ AvahiPoll api;
+ cups_array_t *watched_fds;
+ cups_array_t *timeouts;
+} AvahiCupsPoll;
+#endif /* HAVE_AVAHI */
+
+/*
+ * Prototypes...
+ */
+
+#ifdef HAVE_AVAHI
+extern AvahiCupsPoll * avahi_cups_poll_new(void);
+extern void avahi_cups_poll_free(AvahiCupsPoll *cups_poll);
+extern const AvahiPoll *avahi_cups_poll_get(AvahiCupsPoll *cups_poll);
+#endif /* HAVE_AVAHI */
+
+
+/*
+ * End of "$Id$".
+ */
diff -up cups-1.5.2/scheduler/Makefile.avahi-4-poll cups-1.5.2/scheduler/Makefile
--- cups-1.5.2/scheduler/Makefile.avahi-4-poll 2012-03-14 15:06:36.508476980 +0000
+++ cups-1.5.2/scheduler/Makefile 2012-03-14 15:07:29.476542380 +0000
@@ -17,6 +17,7 @@ include ../Makedefs
CUPSDOBJS = \
auth.o \
+ avahi.o \
banners.o \
cert.o \
classes.o \
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