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/*
* file com_base.c - functions needed for all communications
*
* $Id: com_base.c,v 1.7 2006/02/24 21:29:16 fzago Exp $
*
* Program XBLAST
* (C) by Oliver Vogel (e-mail: m.vogel@ndh.net)
*
* 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; or (at your option)
* any later version
*
* This program is distributed in the hope that it will be entertaining,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILTY 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 along
* with this program; if not, write to the Free Software Foundation, Inc.
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "xblast.h"
/*
* local variables
*/
XBComm *list = NULL;
/*
* display current XBComm list
*/
static void
CommDisplay (void)
{
unsigned int cnt = 0;
XBComm *comm;
for (comm = list; comm != NULL; comm = comm->next) {
fprintf (stderr, "(%u,%u) ", comm->type, Socket_Fd (comm->socket));
cnt++;
}
fprintf (stderr, " - %u active instances\n", cnt);
} /* CommDisplay */
/*
* add a XBComm
*/
void
CommInit (XBComm * comm, XBCommType type, XBSocket * socket, XBCommFunc readFunc,
XBCommFunc writeFunc, XBCommFunc deleteFunc)
{
/* sanity checks */
assert (NULL != comm);
assert (NULL != socket);
/* add to list */
Dbg_Comm ("adding XBComm type = %u, fd = %u\n", type, Socket_Fd (socket));
comm->next = list;
list = comm;
comm->prev = NULL;
if (NULL != comm->next) {
comm->next->prev = comm;
}
/* set type */
comm->type = type;
/* set socket */
comm->socket = socket;
/* set handler */
comm->readFunc = readFunc;
comm->writeFunc = writeFunc;
comm->deleteFunc = deleteFunc;
/* register socket for reading */
Socket_RegisterRead (comm->socket);
#ifdef DEBUG_COMM
CommDisplay ();
#endif
} /* CommInit */
/*
* remove a XBComm from list, finish socket
* does not free allocation for XBComm structure!!
*/
void
CommFinish (XBComm * comm)
{
assert (comm != NULL);
Dbg_Comm ("removing XBComm type = %u, fd = %u\n", comm->type, Socket_Fd (comm->socket));
/* unregister socket for reading */
Socket_UnregisterRead (comm->socket);
Socket_UnregisterWrite (comm->socket);
/* delete from list */
if (comm->next != NULL) {
comm->next->prev = comm->prev;
}
if (comm->prev != NULL) {
comm->prev->next = comm->next;
}
if (comm == list) {
list = list->next;
}
/* close and free socket */
Net_Close (comm->socket);
comm->socket = NULL;
#ifdef DEBUG_COMM
CommDisplay ();
#endif
} /* CommFinish */
/*
* get socket data for XBComm
*/
XBSocket *
CommSocket (XBComm * comm)
{
assert (NULL != comm);
return comm->socket;
} /* CommSocket */
/*
* find XBComm associated to file descriptor
*/
XBComm *
CommFind (int fd)
{
XBComm *comm;
int cmp;
for (comm = list; comm != NULL; comm = comm->next) {
cmp = Socket_Fd (comm->socket);
if (cmp < 0) {
fprintf (stderr, "undefined socket! type=%u\n", comm->type);
CommDisplay ();
}
if (fd == cmp) {
return comm;
}
}
return NULL;
} /* CommFind */
/*
* end of file com_base.c
*/
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