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/**
* @file bus.c
*
* @brief Implementation of bus_t.
*
*/
/*
* Copyright (C) 2006 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include "bus.h"
typedef struct private_bus_t private_bus_t;
/**
* Private data of a bus_t object.
*/
struct private_bus_t {
/**
* Public part of a bus_t object.
*/
bus_t public;
/**
* List of registered listeners implementing the bus_t interface
*/
linked_list_t *listeners;
/**
* Thread local storage for a unique, simple thread ID
*/
pthread_key_t thread_id;
/**
* Thread local storage the threads IKE_SA
*/
pthread_key_t thread_sa;
};
/**
* Get a unique thread number for a calling thread. Since
* pthread_self returns large and ugly numbers, use this function
* for logging; these numbers are incremental starting at 1
*/
static int get_thread_number(private_bus_t *this)
{
static int current_num = 0, stored_num;
stored_num = (int)pthread_getspecific(this->thread_id);
if (stored_num == 0)
{ /* first call of current thread */
pthread_setspecific(this->thread_id, (void*)++current_num);
return current_num;
}
else
{
return stored_num;
}
}
/**
* Implementation of bus_t.add_listener.
*/
static void add_listener(private_bus_t *this, bus_listener_t *listener)
{
this->listeners->insert_last(this->listeners, (void*)listener);
}
/**
* Implementation of bus_t.set_sa.
*/
static void set_sa(private_bus_t *this, ike_sa_t *ike_sa)
{
pthread_setspecific(this->thread_sa, ike_sa);
}
/**
* Implementation of bus_t.signal.
*/
static void signal_(private_bus_t *this, signal_t signal, level_t condition,
char* format, ...)
{
iterator_t *iterator;
bus_listener_t *listener;
va_list args;
ike_sa_t *ike_sa;
int thread;
ike_sa = pthread_getspecific(this->thread_sa);
thread = get_thread_number(this);
va_start(args, format);
iterator = this->listeners->create_iterator(this->listeners, TRUE);
while (iterator->iterate(iterator, (void**)&listener))
{
listener->signal(listener, thread, ike_sa,
signal, condition, format, args);
}
iterator->destroy(iterator);
va_end(args);
}
/**
* Implementation of bus_t.destroy.
*/
static void destroy(private_bus_t *this)
{
this->listeners->destroy(this->listeners);
free(this);
}
/*
* Described in header.
*/
bus_t *bus_create()
{
private_bus_t *this = malloc_thing(private_bus_t);
this->public.add_listener = (void(*)(bus_t*,bus_listener_t*))add_listener;
this->public.set_sa = (void(*)(bus_t*,ike_sa_t*))set_sa;
this->public.signal = (void(*)(bus_t*,signal_t,level_t,char*,...))signal_;
this->public.destroy = (void(*)(bus_t*)) destroy;
this->listeners = linked_list_create();
pthread_key_create(&this->thread_id, NULL);
pthread_key_create(&this->thread_sa, NULL);
return &(this->public);
}
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