bitlbee - personal fork of github.com/bitlbee/bitlbee

diff options

Diffstat (limited to 'skype/skype.c')

-rw-r--r--

1 files changed, 1 insertions, 1 deletions

/********************************************************************\ * BitlBee -- An IRC to other IM-networks gateway * * * * Copyright 2002-2006 Wilmer van der Gaast and others * \********************************************************************/ /* * Event handling (using libevent) */ /* This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License with the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL; if not, write to the Free Software Foundation, Inc., 51 Franklin St., Fifth Floor, Boston, MA 02110-1301 USA */ #define BITLBEE_CORE #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/types.h> #include <sys/time.h> #include <event.h> #include "proxy.h" static void b_main_restart(); static guint id_next = 1; /* Next ID to be allocated to an event handler. */ static guint id_cur = 0; /* Event ID that we're currently handling. */ static guint id_dead; /* Set to 1 if b_event_remove removes id_cur. */ static GHashTable *id_hash; static int quitting = 0; /* Prepare to quit, stop handling events. */ /* Since libevent doesn't handle two event handlers for one fd-condition very well (which happens sometimes when BitlBee changes event handlers for a combination), let's buid some indexes so we can delete them here already, just in time. */ static GHashTable *read_hash; static GHashTable *write_hash; struct event_base *leh; struct event_base *old_leh; struct b_event_data { guint id; struct event evinfo; gint timeout; b_event_handler function; void *data; guint flags; }; void b_main_init() { if (leh != NULL) { /* Clean up the hash tables? */ b_main_restart(); old_leh = leh; } leh = event_init(); id_hash = g_hash_table_new(g_int_hash, g_int_equal); read_hash = g_hash_table_new(g_int_hash, g_int_equal); write_hash = g_hash_table_new(g_int_hash, g_int_equal); } void b_main_run() { /* This while loop is necessary to exit the event loop and start a different one (necessary for ForkDaemon mode). */ while (event_base_dispatch(leh) == 0 && !quitting) { if (old_leh != NULL) { /* For some reason this just isn't allowed... Possibly a bug in older versions, will see later. event_base_free( old_leh ); */ old_leh = NULL; } event_debug("New event loop.\n"); } } static void b_main_restart() { struct timeval tv; memset(&tv, 0, sizeof(struct timeval)); event_base_loopexit(leh, &tv); event_debug("b_main_restart()\n"); } void b_main_quit() { /* Tell b_main_run() that it shouldn't restart the loop. Also, libevent sometimes generates events before really quitting, we want to stop them. */ quitting = 1; b_main_restart(); } static void b_event_passthrough(int fd, short event, void *data) { struct b_event_data *b_ev = data; b_input_condition cond = 0; gboolean st; if (fd >= 0) { if (event & EV_READ) { cond |= B_EV_IO_READ; } if (event & EV_WRITE) { cond |= B_EV_IO_WRITE; } } event_debug("b_event_passthrough( %d, %d, 0x%x ) (%d)\n", fd, event, (int) data, b_ev->id); /* Since the called function might cancel this handler already (which free()s b_ev), we have to remember the ID here. */ id_cur = b_ev->id; id_dead = 0; if (quitting) { b_event_remove(id_cur); return; } st = b_ev->function(b_ev->data, fd, cond); if (id_dead) { /* This event was killed already, don't touch it! */ return; } else if (!st && !(b_ev->flags & B_EV_FLAG_FORCE_REPEAT)) { event_debug("Handler returned FALSE: "); b_event_remove(id_cur); } else if (fd == -1) { /* fd == -1 means it was a timer. These can't be auto-repeated so it has to be recreated every time. */ struct timeval tv; tv.tv_sec = b_ev->timeout / 1000; tv.tv_usec = (b_ev->timeout % 1000) * 1000; evtimer_add(&b_ev->evinfo, &tv); } } gint b_input_add(gint fd, b_input_condition condition, b_event_handler function, gpointer data) { struct b_event_data *b_ev; event_debug("b_input_add( %d, %d, 0x%x, 0x%x ) ", fd, condition, function, data); if ((condition & B_EV_IO_READ && (b_ev = g_hash_table_lookup(read_hash, &fd))) || (condition & B_EV_IO_WRITE && (b_ev = g_hash_table_lookup(write_hash, &fd)))) { /* We'll stick with this libevent entry, but give it a new BitlBee id. */ g_hash_table_remove(id_hash, &b_ev->id); event_debug("(replacing old handler (id = %d)) = %d\n", b_ev->id, id_next); b_ev->id = id_next++; b_ev->function = function; b_ev->data = data; } else { GIOCondition out_cond; event_debug("(new) = %d\n", id_next); b_ev = g_new0(struct b_event_data, 1); b_ev->id = id_next++; b_ev->function = function; b_ev->data = data; out_cond = EV_PERSIST; if (condition & B_EV_IO_READ) { out_cond |= EV_READ; } if (condition & B_EV_IO_WRITE) { out_cond |= EV_WRITE; } event_set(&b_ev->evinfo, fd, out_cond, b_event_passthrough, b_ev); event_add(&b_ev->evinfo, NULL); if (out_cond & EV_READ) { g_hash_table_insert(read_hash, &b_ev->evinfo.ev_fd, b_ev); } if (out_cond & EV_WRITE) { g_hash_table_insert(write_hash, &b_ev->evinfo.ev_fd, b_ev); } } b_ev->flags = condition; g_hash_table_insert(id_hash, &b_ev->id, b_ev); return b_ev->id; } /* TODO: Persistence for timers! */ gint b_timeout_add(gint timeout, b_event_handler function, gpointer data) { struct b_event_data *b_ev = g_new0(struct b_event_data, 1); struct timeval tv; b_ev->id = id_next++; b_ev->timeout = timeout; b_ev->function = function; b_ev->data = data; tv.tv_sec = timeout / 1000; tv.tv_usec = (timeout % 1000) * 1000; evtimer_set(&b_ev->evinfo, b_event_passthrough, b_ev); evtimer_add(&b_ev->evinfo, &tv); event_debug("b_timeout_add( %d, 0x%x, 0x%x ) = %d\n", timeout, function, data, b_ev->id); g_hash_table_insert(id_hash, &b_ev->id, b_ev); return b_ev->id; } void b_event_remove(gint id) { struct b_event_data *b_ev = g_hash_table_lookup(id_hash, &id); event_debug("b_event_remove( %d )\n", id); if (b_ev) { if (id == id_cur) { id_dead = TRUE; } g_hash_table_remove(id_hash, &b_ev->id); if (b_ev->evinfo.ev_fd >= 0) { if (b_ev->evinfo.ev_events & EV_READ) { g_hash_table_remove(read_hash, &b_ev->evinfo.ev_fd); } if (b_ev->evinfo.ev_events & EV_WRITE) { g_hash_table_remove(write_hash, &b_ev->evinfo.ev_fd); } } event_del(&b_ev->evinfo); g_free(b_ev); } else { event_debug("Already removed?\n"); } } void closesocket(int fd) { struct b_event_data *b_ev; /* Since epoll() (the main reason we use libevent) automatically removes sockets from the epoll() list when a socket gets closed and some modules have a habit of closing sockets before removing event handlers, our and libevent's administration get a little bit messed up. So this little function will remove the handlers properly before closing a socket. */ if ((b_ev = g_hash_table_lookup(read_hash, &fd))) { event_debug("Warning: fd %d still had a read event handler when shutting down.\n", fd); b_event_remove(b_ev->id); } if ((b_ev = g_hash_table_lookup(write_hash, &fd))) { event_debug("Warning: fd %d still had a write event handler when shutting down.\n", fd); b_event_remove(b_ev->id); } close(fd); }


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