-/* $Id$ */
-
/***
This file is part of avahi.
-
+
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
-
+
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
-
+
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
#include <avahi-common/llist.h>
#include <avahi-common/malloc.h>
+#include <avahi-common/timeval.h>
#include "glib-watch.h"
struct AvahiWatch {
AvahiGLibPoll *glib_poll;
int dead;
+
GPollFD pollfd;
int pollfd_added;
+
AvahiWatchCallback callback;
void *userdata;
AVAHI_LLIST_FIELDS(AvahiWatch, watches);
};
+struct AvahiTimeout {
+ AvahiGLibPoll *glib_poll;
+ gboolean dead;
+
+ gboolean enabled;
+ struct timeval expiry;
+
+ AvahiTimeoutCallback callback;
+ void *userdata;
+
+ AVAHI_LLIST_FIELDS(AvahiTimeout, timeouts);
+};
+
struct AvahiGLibPoll {
GSource source;
AvahiPoll api;
GMainContext *context;
- struct timeval wakeup;
- gboolean use_wakeup;
- int req_cleanup;
-
- AvahiGLibProcessCallback process_callback;
- void *userdata;
-
+ gboolean timeout_req_cleanup;
+ gboolean watch_req_cleanup;
+
AVAHI_LLIST_HEAD(AvahiWatch, watches);
+ AVAHI_LLIST_HEAD(AvahiTimeout, timeouts);
};
static void destroy_watch(AvahiWatch *w) {
avahi_free(w);
}
-static void cleanup(AvahiGLibPoll *g, int all) {
+static void cleanup_watches(AvahiGLibPoll *g, int all) {
AvahiWatch *w, *next;
assert(g);
destroy_watch(w);
}
- g->req_cleanup = 0;
+ g->watch_req_cleanup = 0;
+}
+
+static gushort map_events_to_glib(AvahiWatchEvent events) {
+ return
+ (events & AVAHI_WATCH_IN ? G_IO_IN : 0) |
+ (events & AVAHI_WATCH_OUT ? G_IO_OUT : 0) |
+ (events & AVAHI_WATCH_ERR ? G_IO_ERR : 0) |
+ (events & AVAHI_WATCH_HUP ? G_IO_HUP : 0);
}
-static AvahiWatch* watch_new(AvahiPoll *api, int fd, AvahiWatchEvent event, AvahiWatchCallback callback, void *userdata) {
+static AvahiWatchEvent map_events_from_glib(gushort events) {
+ return
+ (events & G_IO_IN ? AVAHI_WATCH_IN : 0) |
+ (events & G_IO_OUT ? AVAHI_WATCH_OUT : 0) |
+ (events & G_IO_ERR ? AVAHI_WATCH_ERR : 0) |
+ (events & G_IO_HUP ? AVAHI_WATCH_HUP : 0);
+}
+
+static AvahiWatch* watch_new(const AvahiPoll *api, int fd, AvahiWatchEvent events, AvahiWatchCallback callback, void *userdata) {
AvahiWatch *w;
AvahiGLibPoll *g;
-
+
assert(api);
assert(fd >= 0);
assert(callback);
if (!(w = avahi_new(AvahiWatch, 1)))
return NULL;
-
+
w->glib_poll = g;
w->pollfd.fd = fd;
- w->pollfd.events =
- (event & AVAHI_WATCH_IN ? G_IO_IN : 0) |
- (event & AVAHI_WATCH_OUT ? G_IO_OUT : 0) |
- (event & AVAHI_WATCH_ERR ? G_IO_ERR : 0) |
- (event & AVAHI_WATCH_HUP ? G_IO_HUP : 0);
- ;
+ w->pollfd.events = map_events_to_glib(events);
+ w->pollfd.revents = 0;
w->callback = callback;
w->userdata = userdata;
- w->dead = 0;
+ w->dead = FALSE;
g_source_add_poll(&g->source, &w->pollfd);
- w->pollfd_added = 1;
+ w->pollfd_added = TRUE;
AVAHI_LLIST_PREPEND(AvahiWatch, watches, g->watches, w);
assert(w);
assert(!w->dead);
- w->pollfd.events = events;
+ w->pollfd.events = map_events_to_glib(events);
+}
+
+static AvahiWatchEvent watch_get_events(AvahiWatch *w) {
+ assert(w);
+ assert(!w->dead);
+
+ return map_events_from_glib(w->pollfd.revents);
}
static void watch_free(AvahiWatch *w) {
if (w->pollfd_added) {
g_source_remove_poll(&w->glib_poll->source, &w->pollfd);
- w->pollfd_added = 0;
+ w->pollfd_added = FALSE;
}
-
- w->dead = 1;
- w->glib_poll->req_cleanup = 1;
+
+ w->dead = TRUE;
+ w->glib_poll->timeout_req_cleanup = TRUE;
}
-static void set_wakeup_time(AvahiPoll *api, const struct timeval *tv) {
+static AvahiTimeout* timeout_new(const AvahiPoll *api, const struct timeval *tv, AvahiTimeoutCallback callback, void *userdata) {
+ AvahiTimeout *t;
AvahiGLibPoll *g;
assert(api);
+ assert(callback);
+
g = api->userdata;
+ assert(g);
- if (tv) {
- g->wakeup = *tv;
- g->use_wakeup = 1;
- } else
- g->use_wakeup = 0;
+ if (!(t = avahi_new(AvahiTimeout, 1)))
+ return NULL;
+
+ t->glib_poll = g;
+ t->dead = FALSE;
+
+ if ((t->enabled = !!tv))
+ t->expiry = *tv;
+
+ t->callback = callback;
+ t->userdata = userdata;
+
+ AVAHI_LLIST_PREPEND(AvahiTimeout, timeouts, g->timeouts, t);
+
+ return t;
+}
+
+static void timeout_update(AvahiTimeout *t, const struct timeval *tv) {
+ assert(t);
+ assert(!t->dead);
+
+ if ((t->enabled = !!tv))
+ t->expiry = *tv;
+}
+
+static void timeout_free(AvahiTimeout *t) {
+ assert(t);
+ assert(!t->dead);
+
+ t->dead = TRUE;
+ t->glib_poll->timeout_req_cleanup = TRUE;
+}
+
+static void destroy_timeout(AvahiTimeout *t) {
+ assert(t);
+
+ AVAHI_LLIST_REMOVE(AvahiTimeout, timeouts, t->glib_poll->timeouts, t);
+ avahi_free(t);
+}
+
+static void cleanup_timeouts(AvahiGLibPoll *g, int all) {
+ AvahiTimeout *t, *next;
+ assert(g);
+
+ for (t = g->timeouts; t; t = next) {
+ next = t->timeouts_next;
+
+ if (all || t->dead)
+ destroy_timeout(t);
+ }
+
+ g->timeout_req_cleanup = FALSE;
+}
+
+static AvahiTimeout* find_next_timeout(AvahiGLibPoll *g) {
+ AvahiTimeout *t, *n = NULL;
+ assert(g);
+
+ for (t = g->timeouts; t; t = t->timeouts_next) {
+
+ if (t->dead || !t->enabled)
+ continue;
+
+ if (!n || avahi_timeval_compare(&t->expiry, &n->expiry) < 0)
+ n = t;
+ }
+
+ return n;
+}
+
+static void start_timeout_callback(AvahiTimeout *t) {
+ assert(t);
+ assert(!t->dead);
+ assert(t->enabled);
+
+ t->enabled = 0;
+ t->callback(t, t->userdata);
}
static gboolean prepare_func(GSource *source, gint *timeout) {
AvahiGLibPoll *g = (AvahiGLibPoll*) source;
+ AvahiTimeout *next_timeout;
g_assert(g);
g_assert(timeout);
- if (g->use_wakeup) {
+ if (g->watch_req_cleanup)
+ cleanup_watches(g, 0);
+
+ if (g->timeout_req_cleanup)
+ cleanup_timeouts(g, 0);
+
+ if ((next_timeout = find_next_timeout(g))) {
GTimeVal now;
struct timeval tvnow;
AvahiUsec usec;
g_source_get_current_time(source, &now);
tvnow.tv_sec = now.tv_sec;
tvnow.tv_usec = now.tv_usec;
-
- usec = avahi_timeval_diff(&g->wakeup, &tvnow);
- if (usec <= 0)
+ usec = avahi_timeval_diff(&next_timeout->expiry, &tvnow);
+
+ if (usec <= 0) {
+ *timeout = 0;
return TRUE;
+ }
*timeout = (gint) (usec / 1000);
- }
-
+ } else
+ *timeout = -1;
+
return FALSE;
}
static gboolean check_func(GSource *source) {
AvahiGLibPoll *g = (AvahiGLibPoll*) source;
AvahiWatch *w;
+ AvahiTimeout *next_timeout;
g_assert(g);
+ if ((next_timeout = find_next_timeout(g))) {
+ GTimeVal now;
+ struct timeval tvnow;
+ g_source_get_current_time(source, &now);
+ tvnow.tv_sec = now.tv_sec;
+ tvnow.tv_usec = now.tv_usec;
+
+ if (avahi_timeval_compare(&next_timeout->expiry, &tvnow) <= 0)
+ return TRUE;
+ }
+
for (w = g->watches; w; w = w->watches_next)
if (w->pollfd.revents > 0)
return TRUE;
-
+
return FALSE;
}
-static gboolean dispatch_func(GSource *source, GSourceFunc callback, gpointer userdata) {
+static gboolean dispatch_func(GSource *source, AVAHI_GCC_UNUSED GSourceFunc callback, AVAHI_GCC_UNUSED gpointer userdata) {
AvahiGLibPoll* g = (AvahiGLibPoll*) source;
AvahiWatch *w;
-
+ AvahiTimeout *next_timeout;
+
g_assert(g);
- if (g->req_cleanup)
- cleanup(g, 0);
-
- if (g->process_callback)
- g->process_callback(g, g->userdata);
-
+ if ((next_timeout = find_next_timeout(g))) {
+ GTimeVal now;
+ struct timeval tvnow;
+ g_source_get_current_time(source, &now);
+ tvnow.tv_sec = now.tv_sec;
+ tvnow.tv_usec = now.tv_usec;
+
+ if (avahi_timeval_compare(&next_timeout->expiry, &tvnow) < 0) {
+ start_timeout_callback(next_timeout);
+ return TRUE;
+ }
+ }
+
for (w = g->watches; w; w = w->watches_next)
if (w->pollfd.revents > 0) {
assert(w->callback);
- w->callback(w, w->pollfd.fd, w->pollfd.revents, w->userdata);
+ w->callback(w, w->pollfd.fd, map_events_from_glib(w->pollfd.revents), w->userdata);
w->pollfd.revents = 0;
+ return TRUE;
}
- if (g->req_cleanup)
- cleanup(g, 0);
-
return TRUE;
}
-AvahiGLibPoll *avahi_glib_poll_new(GMainContext *context, AvahiGLibProcessCallback callback, void *userdata) {
+AvahiGLibPoll *avahi_glib_poll_new(GMainContext *context, gint priority) {
AvahiGLibPoll *g;
-
+
static GSourceFuncs source_funcs = {
prepare_func,
check_func,
g_main_context_ref(g->context = context ? context : g_main_context_default());
g->api.userdata = g;
+
g->api.watch_new = watch_new;
g->api.watch_free = watch_free;
g->api.watch_update = watch_update;
- g->api.set_wakeup_time = set_wakeup_time;
+ g->api.watch_get_events = watch_get_events;
+
+ g->api.timeout_new = timeout_new;
+ g->api.timeout_free = timeout_free;
+ g->api.timeout_update = timeout_update;
+
+ g->watch_req_cleanup = FALSE;
+ g->timeout_req_cleanup = FALSE;
- g->use_wakeup = 0;
- g->process_callback = callback;
- g->userdata = userdata;
- g->req_cleanup = 0;
-
AVAHI_LLIST_HEAD_INIT(AvahiWatch, g->watches);
-
+ AVAHI_LLIST_HEAD_INIT(AvahiTimeout, g->timeouts);
+
g_source_attach(&g->source, g->context);
+ g_source_set_priority(&g->source, priority);
+ g_source_set_can_recurse(&g->source, FALSE);
return g;
}
GSource *s = &g->source;
assert(g);
- cleanup(g, 1);
-
+ cleanup_watches(g, 1);
+ cleanup_timeouts(g, 1);
+
g_main_context_unref(g->context);
g_source_destroy(s);
g_source_unref(s);
}
-AvahiPoll* avahi_glib_poll_get(AvahiGLibPoll *g) {
+const AvahiPoll* avahi_glib_poll_get(AvahiGLibPoll *g) {
assert(g);
return &g->api;
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