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/* Copyright (C) 2014-2015 Timo Dritschler <timo.dritschler@kit.edu>
(Karlsruhe Institute of Technology)
This library 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.
This library 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 this library; if not, write to the Free Software Foundation, Inc., 51
Franklin St, Fifth Floor, Boston, MA 02110, USA
*/
/**
* SECTION: kiro-sb
* @Short_description: KIRO 'Synchronizing Buffer'
* @Title: KiroSb
*
* KiroSb implements a 'Synchronizing Buffer' that automatically keeps the local
* memory content up to date by mirroring the remote SyncBuffers memory content
* automatically without any required user interaction
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include "kiro-sb.h"
#include "kiro-trb.h"
#include "kiro-server.h"
#include "kiro-client.h"
/*
* Definition of 'private' structures and members and macro to access them
*/
#define KIRO_SB_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), KIRO_TYPE_SB, KiroSbPrivate))
struct _KiroSbPrivate {
/* Properties */
// PLACEHOLDER //
/* 'Real' private structures */
/* (Not accessible by properties) */
int initialized; // 0 if uninitialized, 1 if server, 2 if client
KiroServer* server; // KIRO Server component to serve
KiroClient* client; // KIRO Client component to clone
KiroTrb* trb; // KIRO Ring Buffer to hold and exchange data
GThread *main_thread; // Main thread for the main_loop
GMainLoop *main_loop; // main_loop *duh*
guint close_signal; // Used to signal shutdown of the main_loop
};
G_DEFINE_TYPE (KiroSb, kiro_sb, G_TYPE_OBJECT);
KiroSb *
kiro_sb_new (void)
{
return g_object_new (KIRO_TYPE_SB, NULL);
}
void
kiro_sb_free (KiroSb *sb)
{
g_return_if_fail (sb != NULL);
if (KIRO_IS_SB (sb))
g_object_unref (sb);
else
g_warning ("Trying to use kiro_sb_free on an object which is not a KIRO SB. Ignoring...");
}
static void
kiro_sb_init (KiroSb *self)
{
g_return_if_fail (self != NULL);
KiroSbPrivate *priv = KIRO_SB_GET_PRIVATE (self);
priv->initialized = 0;
priv->trb = NULL;
priv->server = NULL;
priv->client = NULL;
}
static void
kiro_sb_finalize (GObject *object)
{
g_return_if_fail (object != NULL);
KiroSb *self = KIRO_SB (object);
KiroSbPrivate *priv = KIRO_SB_GET_PRIVATE (self);
if (priv->trb) {
kiro_trb_purge (priv->trb, FALSE);
kiro_trb_free (priv->trb);
}
if (priv->server)
kiro_server_free (priv->server);
if (priv->client)
kiro_client_free (priv->client);
priv->trb = NULL;
priv->server = NULL;
priv->client = NULL;
G_OBJECT_CLASS (kiro_sb_parent_class)->finalize (object);
}
static void
kiro_sb_class_init (KiroSbClass *klass)
{
g_return_if_fail (klass != NULL);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = kiro_sb_finalize;
g_type_class_add_private (klass, sizeof (KiroSbPrivate));
}
gpointer
start_main_loop (GMainLoop *loop)
{
g_main_loop_run (loop);
/* wait for mai loop to finish*/
g_main_loop_unref (loop);
return NULL;
}
gboolean
idle_func (KiroSbPrivate *priv)
{
if (priv->close_signal) {
g_main_loop_quit (priv->main_loop);
/*main_thread will do the unref upon exit*/
priv->main_loop = NULL;
g_debug ("Main loop quit");
return G_SOURCE_REMOVE;
}
struct KiroTrbInfo *header = (struct KiroTrbInfo *)kiro_trb_get_raw_buffer (priv->trb);
gulong old_offset = header->offset;
kiro_client_sync_partial (priv->client, 0, sizeof(struct KiroTrbInfo), 0);
kiro_trb_refresh (priv->trb);
if (old_offset != header->offset) {
g_debug ("Fetching new element");
gulong offset = (gulong) (kiro_trb_get_element (priv->trb, -1) - kiro_trb_get_raw_buffer (priv->trb));
kiro_client_sync_partial (priv->client, offset, kiro_trb_get_element_size (priv->trb), offset);
/*INVOKE callback*/
}
return G_SOURCE_CONTINUE;
}
gboolean
kiro_sb_serve (KiroSb *self, gulong size)
{
g_return_val_if_fail (self != NULL, FALSE);
KiroSbPrivate *priv = KIRO_SB_GET_PRIVATE (self);
g_return_val_if_fail (priv->initialized == 0, FALSE);
g_return_val_if_fail ((priv->trb = kiro_trb_new ()), FALSE);
if (0 > kiro_trb_reshape (priv->trb, size, 3)) {
g_debug ("Failed to create KIRO ring buffer");
kiro_trb_free (priv->trb);
return FALSE;
}
void *buff = kiro_trb_get_raw_buffer (priv->trb);
gulong b_size = kiro_trb_get_raw_size (priv->trb);
priv->server = kiro_server_new ();
if (0 > kiro_server_start (priv->server, NULL, "60010", buff, b_size)) {
g_debug ("Failed to start KIRO Server");
kiro_server_free (priv->server);
kiro_trb_free (priv->trb);
return FALSE;
}
priv->initialized = 1;
g_message ("SyncBuffer ready");
return TRUE;
}
gboolean
kiro_sb_clone (KiroSb *self, const gchar* address, const gchar* port)
{
g_return_val_if_fail (self != NULL, FALSE);
KiroSbPrivate *priv = KIRO_SB_GET_PRIVATE (self);
g_return_val_if_fail (priv->initialized == 0, FALSE);
g_return_val_if_fail ((priv->trb = kiro_trb_new ()), FALSE);
priv->client = kiro_client_new ();
if (0 > kiro_client_connect (priv->client, address, port)) {
g_debug ("Failed to connect to remote Sync Buffer");
kiro_trb_free (priv->trb);
kiro_client_free (priv->client);
return FALSE;
}
kiro_client_sync (priv->client);
kiro_trb_adopt (priv->trb, kiro_client_get_memory (priv->client));
priv->main_loop = g_main_loop_new (NULL, FALSE);
g_idle_add ((GSourceFunc)idle_func, priv);
priv->main_thread = g_thread_new ("KIRO SB Main Loop", (GThreadFunc)start_main_loop, priv->main_loop);
return TRUE;
}
gulong
kiro_sb_get_size (KiroSb *self)
{
g_return_val_if_fail (self != NULL, 0);
KiroSbPrivate *priv = KIRO_SB_GET_PRIVATE (self);
g_return_val_if_fail (priv->initialized != 0, 0);
return kiro_trb_get_element_size (priv->trb);
}
/* Privat functions */
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