cellular-infrastructure
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osmo-bsc
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Add implementation to find a lchan by the struct gsm_subscriber 

Really compare pointers to check if the one gsm_subscriber
is equal to the other... gsm_subscriber should be unique for
a given IMSI so comparing the pointers should be fine.
This commit is contained in:
Holger Freyther 2009-01-04 03:48:30 +00:00
parent a471a41680
commit d0e38c3cad
2 changed files with 40 additions and 0 deletions
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24
include/openbsc/chan_alloc.h
View File

@ -1,6 +1,28 @@
/* 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"
/* Special allocator for C0 of BTS */
struct gsm_bts_trx_ts *ts_c0_alloc(struct gsm_bts *bts,
enum gsm_phys_chan_config pchan);
@ -12,6 +34,8 @@ struct gsm_bts_trx_ts *ts_alloc(struct gsm_bts *bts,
/* 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);
/* Allocate a logical channel (SDCCH, TCH, ...) */
struct gsm_lchan *lchan_alloc(struct gsm_bts *bts, enum gsm_chan_t type);

16
src/chan_alloc.c
View File

@ -226,3 +226,19 @@ static void auto_release_channel(void *_lchan)
schedule_timer(&lchan->release_timer, LCHAN_RELEASE_TIMEOUT);
}
struct gsm_lchan* lchan_find(struct gsm_bts *bts, struct gsm_subscriber *subscr) {
int trx, ts_no, lchan_no;
for (trx = 0; trx < bts->num_trx; ++trx) {
for (ts_no = 0; ts_no < 8; ++ts_no) {
for (lchan_no = 0; lchan_no < TS_MAX_LCHAN; ++lchan_no) {
struct gsm_lchan *lchan =
&bts->trx[trx].ts[ts_no].lchan[lchan_no];
if (subscr == lchan->subscr)
return lchan;
}
}
}
return NULL;
}