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/* Management functions to allocate/release struct gsm_lchan */
/* (C) 2008 by Harald Welte <laforge@gnumonks.org>
* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
* All Rights Reserved
*
* 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 along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#ifndef _CHAN_ALLOC_H
#define _CHAN_ALLOC_H
#include "gsm_subscriber.h"
/*
* Refcounting for the lchan. If the refcount drops to zero
* the channel will send a RSL release request.
*/
#define use_lchan(lchan) \
do { lchan->use_count++; \
DEBUGP(DCC, "lchan (bts=%d,trx=%d,ts=%d,ch=%d) increases usage to: %d\n", \
lchan->ts->trx->bts->nr, lchan->ts->trx->nr, lchan->ts->nr, \
lchan->nr, lchan->use_count); \
} while(0);
#define put_lchan(lchan) \
do { lchan->use_count--; \
DEBUGP(DCC, "lchan (bts=%d,trx=%d,ts=%d,ch=%d) decreases usage to: %d\n", \
lchan->ts->trx->bts->nr, lchan->ts->trx->nr, lchan->ts->nr, \
lchan->nr, lchan->use_count); \
if (lchan->use_count <= 0) \
_lchan_release(lchan); \
} while(0);
/* Special allocator for C0 of BTS */
struct gsm_bts_trx_ts *ts_c0_alloc(struct gsm_bts *bts,
enum gsm_phys_chan_config pchan);
/* Regular physical channel allocator */
struct gsm_bts_trx_ts *ts_alloc(struct gsm_bts *bts,
enum gsm_phys_chan_config pchan);
/* Regular physical channel (TS) */
void ts_free(struct gsm_bts_trx_ts *ts);
/* Find an allocated channel */
struct gsm_lchan *lchan_find(struct gsm_bts *bts, struct gsm_subscriber *subscr);
/* Find an allocated channel for a specified subscriber */
struct gsm_lchan *lchan_for_subscr(struct gsm_subscriber *subscr);
/* Allocate a logical channel (SDCCH, TCH, ...) */
struct gsm_lchan *lchan_alloc(struct gsm_bts *bts, enum gsm_chan_t type);
/* Free a logical channel (SDCCH, TCH, ...) */
void lchan_free(struct gsm_lchan *lchan);
/* internal.. do not use */
int _lchan_release(struct gsm_lchan *lchan);
#endif /* _CHAN_ALLOC_H */
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