diff options
author | Lennart Poettering <lennart@poettering.net> | 2005-08-12 19:09:50 +0000 |
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committer | Lennart Poettering <lennart@poettering.net> | 2005-08-12 19:09:50 +0000 |
commit | 5d047523c87ba11aad8c384f7ffde25b4dd746ed (patch) | |
tree | b160aa74a0c9e77db3bc9b864f503771adaa6758 /avahi-glib/glib-watch.c | |
parent | f8c479234af6b676027df4fb6b38ce8e22949049 (diff) |
implement new main loop abstraction layer
git-svn-id: file:///home/lennart/svn/public/avahi/trunk@305 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe
Diffstat (limited to 'avahi-glib/glib-watch.c')
-rw-r--r-- | avahi-glib/glib-watch.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/avahi-glib/glib-watch.c b/avahi-glib/glib-watch.c new file mode 100644 index 0000000..7eab84b --- /dev/null +++ b/avahi-glib/glib-watch.c @@ -0,0 +1,261 @@ +/* $Id$ */ + +/*** + 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 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <avahi-common/llist.h> +#include <avahi-common/malloc.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 AvahiGLibPoll { + GSource source; + AvahiPoll api; + GMainContext *context; + + struct timeval wakeup; + gboolean use_wakeup; + int req_cleanup; + + AvahiGLibProcessCallback process_callback; + void *userdata; + + AVAHI_LLIST_HEAD(AvahiWatch, watches); +}; + +static void destroy_watch(AvahiWatch *w) { + assert(w); + + if (w->pollfd_added) + g_source_remove_poll(&w->glib_poll->source, &w->pollfd); + + AVAHI_LLIST_REMOVE(AvahiWatch, watches, w->glib_poll->watches, w); + + avahi_free(w); +} + +static void cleanup(AvahiGLibPoll *g, int all) { + AvahiWatch *w, *next; + assert(g); + + for (w = g->watches; w; w = next) { + next = w->watches_next; + + if (all || w->dead) + destroy_watch(w); + } + + g->req_cleanup = 0; +} + +static AvahiWatch* watch_new(AvahiPoll *api, int fd, AvahiWatchEvent event, AvahiWatchCallback callback, void *userdata) { + AvahiWatch *w; + AvahiGLibPoll *g; + + assert(api); + assert(fd >= 0); + assert(callback); + + g = api->userdata; + assert(g); + + 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->callback = callback; + w->userdata = userdata; + w->dead = 0; + + g_source_add_poll(&g->source, &w->pollfd); + w->pollfd_added = 1; + + AVAHI_LLIST_PREPEND(AvahiWatch, watches, g->watches, w); + + return w; +} + +static void watch_update(AvahiWatch *w, AvahiWatchEvent events) { + assert(w); + assert(!w->dead); + + w->pollfd.events = events; +} + +static void watch_free(AvahiWatch *w) { + assert(w); + assert(!w->dead); + + if (w->pollfd_added) { + g_source_remove_poll(&w->glib_poll->source, &w->pollfd); + w->pollfd_added = 0; + } + + w->dead = 1; + w->glib_poll->req_cleanup = 1; +} + +static void set_wakeup_time(AvahiPoll *api, const struct timeval *tv) { + AvahiGLibPoll *g; + + assert(api); + g = api->userdata; + + if (tv) { + g->wakeup = *tv; + g->use_wakeup = 1; + } else + g->use_wakeup = 0; +} + +static gboolean prepare_func(GSource *source, gint *timeout) { + AvahiGLibPoll *g = (AvahiGLibPoll*) source; + + g_assert(g); + g_assert(timeout); + + if (g->use_wakeup) { + 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) + return TRUE; + + *timeout = (gint) (usec / 1000); + } + + return FALSE; +} + +static gboolean check_func(GSource *source) { + AvahiGLibPoll *g = (AvahiGLibPoll*) source; + AvahiWatch *w; + + g_assert(g); + + 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) { + AvahiGLibPoll* g = (AvahiGLibPoll*) source; + AvahiWatch *w; + + g_assert(g); + + if (g->req_cleanup) + cleanup(g, 0); + + if (g->process_callback) + g->process_callback(g, g->userdata); + + 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->pollfd.revents = 0; + } + + if (g->req_cleanup) + cleanup(g, 0); + + return TRUE; +} + +AvahiGLibPoll *avahi_glib_poll_new(GMainContext *context, AvahiGLibProcessCallback callback, void *userdata) { + AvahiGLibPoll *g; + + static GSourceFuncs source_funcs = { + prepare_func, + check_func, + dispatch_func, + NULL, + NULL, + NULL + }; + + g = (AvahiGLibPoll*) g_source_new(&source_funcs, sizeof(AvahiGLibPoll)); + 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->use_wakeup = 0; + g->process_callback = callback; + g->userdata = userdata; + g->req_cleanup = 0; + + AVAHI_LLIST_HEAD_INIT(AvahiWatch, g->watches); + + g_source_attach(&g->source, g->context); + + return g; +} + +void avahi_glib_poll_free(AvahiGLibPoll *g) { + GSource *s = &g->source; + assert(g); + + cleanup(g, 1); + + g_main_context_unref(g->context); + g_source_destroy(s); + g_source_unref(s); +} + +AvahiPoll* avahi_glib_poll_get(AvahiGLibPoll *g) { + assert(g); + + return &g->api; +} |