X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-glib%2Fglib-watch.c;h=5b60bbc4cfcbe6c5922547bec031f97364bcc09c;hb=908e491f7d55209acfbb2595ab1ef5b24502d641;hp=4af23907f301c2bebc8cef2ff0653ca179e095de;hpb=4f0a5e7572a4257894b4bfede42c26d65152609e;p=catta

diff --git a/avahi-glib/glib-watch.c b/avahi-glib/glib-watch.c
index 4af2390..5b60bbc 100644
--- a/avahi-glib/glib-watch.c
+++ b/avahi-glib/glib-watch.c
@@ -1,18 +1,16 @@
-/* $Id$ */
-
 /***
   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
@@ -25,32 +23,46 @@
 
 #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;
-    AvahiWakeupCallback wakeup_callback;
-    void *wakeup_userdata;
-    
-    int req_cleanup;
-    
-     AVAHI_LLIST_HEAD(AvahiWatch, watches);
+    gboolean timeout_req_cleanup;
+    gboolean watch_req_cleanup;
+
+    AVAHI_LLIST_HEAD(AvahiWatch, watches);
+    AVAHI_LLIST_HEAD(AvahiTimeout, timeouts);
 };
 
 static void destroy_watch(AvahiWatch *w) {
@@ -64,7 +76,7 @@ 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);
 
@@ -75,13 +87,29 @@ static void cleanup(AvahiGLibPoll *g, int all) {
             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);
@@ -91,21 +119,17 @@ static AvahiWatch* watch_new(AvahiPoll *api, int fd, AvahiWatchEvent event, Avah
 
     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);
 
@@ -116,7 +140,14 @@ static void watch_update(AvahiWatch *w, AvahiWatchEvent events) {
     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) {
@@ -125,62 +156,116 @@ 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(AvahiPoll *api, const struct timeval *tv, AvahiWakeupCallback callback, void *userdata) {
+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 (callback) {
-        if (tv) 
-            g->wakeup = *tv;
-        else {
-            g->wakeup.tv_sec = 0;
-            g->wakeup.tv_usec = 0;
-        }
-            
-        g->wakeup_callback = callback;
-        g->wakeup_userdata = userdata;
-    } else
-        g->wakeup_callback = NULL;
+    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 start_wakeup_callback(AvahiGLibPoll *g) {
-    AvahiWakeupCallback callback;
-    void *userdata;
+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);
 
-    /* Reset the wakeup functions, but allow changing of the two
-       values from the callback function */
+    for (t = g->timeouts; t; t = next) {
+        next = t->timeouts_next;
 
-    callback = g->wakeup_callback;
-    userdata = g->wakeup_userdata;
-    g->wakeup_callback = NULL;
-    g->wakeup_userdata = NULL;
+        if (all || t->dead)
+            destroy_timeout(t);
+    }
 
-    assert(callback);
-    
-    callback(&g->api, userdata);
+    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->req_cleanup)
-        cleanup(g, 0);
-    
-    if (g->wakeup_callback) {
+    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;
@@ -188,65 +273,70 @@ static gboolean prepare_func(GSource *source, gint *timeout) {
         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 (g->wakeup_callback) {
+    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(&g->wakeup, &tvnow) < 0)
+
+        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->wakeup_callback) {
+    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(&g->wakeup, &tvnow) < 0) {
-            start_wakeup_callback(g);
+
+        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;
         }
@@ -254,9 +344,9 @@ static gboolean dispatch_func(GSource *source, GSourceFunc callback, gpointer us
     return TRUE;
 }
 
-AvahiGLibPoll *avahi_glib_poll_new(GMainContext *context) {
+AvahiGLibPoll *avahi_glib_poll_new(GMainContext *context, gint priority) {
     AvahiGLibPoll *g;
-    
+
     static GSourceFuncs source_funcs = {
         prepare_func,
         check_func,
@@ -270,17 +360,25 @@ AvahiGLibPoll *avahi_glib_poll_new(GMainContext *context) {
     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 = set_wakeup;
+    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->wakeup_callback = NULL;
-    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;
 }
@@ -289,17 +387,15 @@ void avahi_glib_poll_free(AvahiGLibPoll *g) {
     GSource *s = &g->source;
     assert(g);
 
-/*     g_message("BEFORE"); */
-    cleanup(g, 1);
+    cleanup_watches(g, 1);
+    cleanup_timeouts(g, 1);
 
-/*     g_message("MIDDLE"); */
     g_main_context_unref(g->context);
     g_source_destroy(s);
     g_source_unref(s);
-/*     g_message("AFTER"); */
 }
 
-AvahiPoll* avahi_glib_poll_get(AvahiGLibPoll *g) {
+const AvahiPoll* avahi_glib_poll_get(AvahiGLibPoll *g) {
     assert(g);
 
     return &g->api;