Sat Nov 25 00:46:04 2006

Asterisk developer's documentation


features.h File Reference

Call Parking and Pickup API Includes code and algorithms from the Zapata library. More...

Go to the source code of this file.

Data Structures

struct  ast_call_feature
 main call feature structure More...

Defines

#define FEATURE_APP_ARGS_LEN   256
#define FEATURE_APP_LEN   64
#define FEATURE_EXTEN_LEN   32
#define FEATURE_MAX_LEN   11
#define FEATURE_SNAME_LEN   32

Functions

int ast_bridge_call (struct ast_channel *chan, struct ast_channel *peer, struct ast_bridge_config *config)
 Bridge a call, optionally allowing redirection.
int ast_masq_park_call (struct ast_channel *rchan, struct ast_channel *host, int timeout, int *extout)
 Park a call via a masqueraded channel.
int ast_park_call (struct ast_channel *chan, struct ast_channel *host, int timeout, int *extout)
 Park a call and read back parked location.
char * ast_parking_ext (void)
 Determine system parking extension Returns the call parking extension for drivers that provide special call parking help.
int ast_pickup_call (struct ast_channel *chan)
 Pickup a call.
char * ast_pickup_ext (void)
 Determine system call pickup extension.
void ast_register_feature (struct ast_call_feature *feature)
 register new feature into feature_set
void ast_unregister_feature (struct ast_call_feature *feature)
 unregister feature from feature_set


Detailed Description

Call Parking and Pickup API Includes code and algorithms from the Zapata library.

Definition in file features.h.


Define Documentation

#define FEATURE_APP_ARGS_LEN   256
 

Definition at line 29 of file features.h.

Referenced by load_config().

#define FEATURE_APP_LEN   64
 

Definition at line 28 of file features.h.

Referenced by load_config().

#define FEATURE_EXTEN_LEN   32
 

Definition at line 31 of file features.h.

Referenced by load_config().

#define FEATURE_MAX_LEN   11
 

Definition at line 27 of file features.h.

Referenced by ast_bridge_call().

#define FEATURE_SNAME_LEN   32
 

Definition at line 30 of file features.h.

Referenced by load_config().


Function Documentation

int ast_bridge_call struct ast_channel chan,
struct ast_channel peer,
struct ast_bridge_config config
 

Bridge a call, optionally allowing redirection.

Definition at line 1264 of file res_features.c.

References ast_channel::appl, ast_answer(), ast_cdr_appenduserfield(), ast_cdr_setuserfield(), ast_channel_bridge(), ast_frfree(), ast_log(), ast_strlen_zero(), ast_channel::cdr, config, ast_channel::data, FEATURE_MAX_LEN, free, LOG_DEBUG, monitor_app, ast_channel::name, pbx_builtin_getvar_helper(), pbx_builtin_setvar_helper(), pbx_exec(), pbx_findapp(), set_config_flags(), and ast_cdr::userfield.

Referenced by ast_bridge_call_thread(), builtin_atxfer(), and park_exec().

01265 {
01266    /* Copy voice back and forth between the two channels.  Give the peer
01267       the ability to transfer calls with '#<extension' syntax. */
01268    struct ast_frame *f;
01269    struct ast_channel *who;
01270    char chan_featurecode[FEATURE_MAX_LEN + 1]="";
01271    char peer_featurecode[FEATURE_MAX_LEN + 1]="";
01272    int res;
01273    int diff;
01274    int hasfeatures=0;
01275    int hadfeatures=0;
01276    struct ast_option_header *aoh;
01277    struct ast_bridge_config backup_config;
01278    char *monitor_exec;
01279 
01280    memset(&backup_config, 0, sizeof(backup_config));
01281 
01282    config->start_time = ast_tvnow();
01283 
01284    if (chan && peer) {
01285       pbx_builtin_setvar_helper(chan, "BRIDGEPEER", peer->name);
01286       pbx_builtin_setvar_helper(peer, "BRIDGEPEER", chan->name);
01287    } else if (chan)
01288       pbx_builtin_setvar_helper(chan, "BLINDTRANSFER", NULL);
01289 
01290    if (monitor_ok) {
01291       if (!monitor_app) { 
01292          if (!(monitor_app = pbx_findapp("Monitor")))
01293             monitor_ok=0;
01294       }
01295       if (monitor_app) {
01296          if ((monitor_exec = pbx_builtin_getvar_helper(chan, "AUTO_MONITOR"))) 
01297             pbx_exec(chan, monitor_app, monitor_exec, 1);
01298          else if ((monitor_exec = pbx_builtin_getvar_helper(peer, "AUTO_MONITOR")))
01299             pbx_exec(peer, monitor_app, monitor_exec, 1);
01300       }
01301    }
01302    
01303    set_config_flags(chan, peer, config);
01304    config->firstpass = 1;
01305 
01306    /* Answer if need be */
01307    if (ast_answer(chan))
01308       return -1;
01309    peer->appl = "Bridged Call";
01310    peer->data = chan->name;
01311 
01312    /* copy the userfield from the B-leg to A-leg if applicable */
01313    if (chan->cdr && peer->cdr && !ast_strlen_zero(peer->cdr->userfield)) {
01314       char tmp[256];
01315       if (!ast_strlen_zero(chan->cdr->userfield)) {
01316          snprintf(tmp, sizeof(tmp), "%s;%s", chan->cdr->userfield, peer->cdr->userfield);
01317          ast_cdr_appenduserfield(chan, tmp);
01318       } else
01319          ast_cdr_setuserfield(chan, peer->cdr->userfield);
01320       /* free the peer's cdr without ast_cdr_free complaining */
01321       free(peer->cdr);
01322       peer->cdr = NULL;
01323    }
01324    for (;;) {
01325       res = ast_channel_bridge(chan, peer, config, &f, &who);
01326 
01327       if (config->feature_timer) {
01328          /* Update time limit for next pass */
01329          diff = ast_tvdiff_ms(ast_tvnow(), config->start_time);
01330          config->feature_timer -= diff;
01331          if (hasfeatures) {
01332             /* Running on backup config, meaning a feature might be being
01333                activated, but that's no excuse to keep things going 
01334                indefinitely! */
01335             if (backup_config.feature_timer && ((backup_config.feature_timer -= diff) <= 0)) {
01336                ast_log(LOG_DEBUG, "Timed out, realtime this time!\n");
01337                config->feature_timer = 0;
01338                who = chan;
01339                if (f)
01340                   ast_frfree(f);
01341                f = NULL;
01342                res = 0;
01343             } else if (config->feature_timer <= 0) {
01344                /* Not *really* out of time, just out of time for
01345                   digits to come in for features. */
01346                ast_log(LOG_DEBUG, "Timed out for feature!\n");
01347                if (!ast_strlen_zero(peer_featurecode)) {
01348                   ast_dtmf_stream(chan, peer, peer_featurecode, 0);
01349                   memset(peer_featurecode, 0, sizeof(peer_featurecode));
01350                }
01351                if (!ast_strlen_zero(chan_featurecode)) {
01352                   ast_dtmf_stream(peer, chan, chan_featurecode, 0);
01353                   memset(chan_featurecode, 0, sizeof(chan_featurecode));
01354                }
01355                if (f)
01356                   ast_frfree(f);
01357                hasfeatures = !ast_strlen_zero(chan_featurecode) || !ast_strlen_zero(peer_featurecode);
01358                if (!hasfeatures) {
01359                   /* Restore original (possibly time modified) bridge config */
01360                   memcpy(config, &backup_config, sizeof(struct ast_bridge_config));
01361                   memset(&backup_config, 0, sizeof(backup_config));
01362                }
01363                hadfeatures = hasfeatures;
01364                /* Continue as we were */
01365                continue;
01366             } else if (!f) {
01367                /* The bridge returned without a frame and there is a feature in progress.
01368                 * However, we don't think the feature has quite yet timed out, so just
01369                 * go back into the bridge. */
01370                continue;
01371             }
01372          } else {
01373             if (config->feature_timer <=0) {
01374                /* We ran out of time */
01375                config->feature_timer = 0;
01376                who = chan;
01377                if (f)
01378                   ast_frfree(f);
01379                f = NULL;
01380                res = 0;
01381             }
01382          }
01383       }
01384       if (res < 0) {
01385          ast_log(LOG_WARNING, "Bridge failed on channels %s and %s\n", chan->name, peer->name);
01386          return -1;
01387       }
01388       
01389       if (!f || ((f->frametype == AST_FRAME_CONTROL) && ((f->subclass == AST_CONTROL_HANGUP) || (f->subclass == AST_CONTROL_BUSY) || 
01390          (f->subclass == AST_CONTROL_CONGESTION)))) {
01391             res = -1;
01392             break;
01393       }
01394       if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RINGING)) {
01395          if (who == chan)
01396             ast_indicate(peer, AST_CONTROL_RINGING);
01397          else
01398             ast_indicate(chan, AST_CONTROL_RINGING);
01399       }
01400       if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == -1)) {
01401          if (who == chan)
01402             ast_indicate(peer, -1);
01403          else
01404             ast_indicate(chan, -1);
01405       }
01406       if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_FLASH)) {
01407          if (who == chan)
01408             ast_indicate(peer, AST_CONTROL_FLASH);
01409          else
01410             ast_indicate(chan, AST_CONTROL_FLASH);
01411       }
01412       if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_OPTION)) {
01413          aoh = f->data;
01414          /* Forward option Requests */
01415          if (aoh && (aoh->flag == AST_OPTION_FLAG_REQUEST)) {
01416             if (who == chan)
01417                ast_channel_setoption(peer, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
01418             else
01419                ast_channel_setoption(chan, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
01420          }
01421       }
01422       /* check for '*', if we find it it's time to disconnect */
01423       if (f && (f->frametype == AST_FRAME_DTMF)) {
01424          char *featurecode;
01425          int sense;
01426          struct ast_channel *other;
01427 
01428          hadfeatures = hasfeatures;
01429          /* This cannot overrun because the longest feature is one shorter than our buffer */
01430          if (who == chan) {
01431             other = peer;
01432             sense = FEATURE_SENSE_CHAN;
01433             featurecode = chan_featurecode;
01434          } else  {
01435             other = chan;
01436             sense = FEATURE_SENSE_PEER;
01437             featurecode = peer_featurecode;
01438          }
01439          featurecode[strlen(featurecode)] = f->subclass;
01440          /* Get rid of the frame before we start doing "stuff" with the channels */
01441          ast_frfree(f);
01442          f = NULL;
01443          config->feature_timer = backup_config.feature_timer;
01444          res = ast_feature_interpret(chan, peer, config, featurecode, sense);
01445          switch(res) {
01446          case FEATURE_RETURN_PASSDIGITS:
01447             ast_dtmf_stream(other, who, featurecode, 0);
01448             /* Fall through */
01449          case FEATURE_RETURN_SUCCESS:
01450             memset(featurecode, 0, sizeof(chan_featurecode));
01451             break;
01452          }
01453          if (res >= FEATURE_RETURN_PASSDIGITS) {
01454             res = 0;
01455          } else 
01456             break;
01457          hasfeatures = !ast_strlen_zero(chan_featurecode) || !ast_strlen_zero(peer_featurecode);
01458          if (hadfeatures && !hasfeatures) {
01459             /* Restore backup */
01460             memcpy(config, &backup_config, sizeof(struct ast_bridge_config));
01461             memset(&backup_config, 0, sizeof(struct ast_bridge_config));
01462          } else if (hasfeatures) {
01463             if (!hadfeatures) {
01464                /* Backup configuration */
01465                memcpy(&backup_config, config, sizeof(struct ast_bridge_config));
01466                /* Setup temporary config options */
01467                config->play_warning = 0;
01468                ast_clear_flag(&(config->features_caller), AST_FEATURE_PLAY_WARNING);
01469                ast_clear_flag(&(config->features_callee), AST_FEATURE_PLAY_WARNING);
01470                config->warning_freq = 0;
01471                config->warning_sound = NULL;
01472                config->end_sound = NULL;
01473                config->start_sound = NULL;
01474                config->firstpass = 0;
01475             }
01476             config->start_time = ast_tvnow();
01477             config->feature_timer = featuredigittimeout;
01478             ast_log(LOG_DEBUG, "Set time limit to %ld\n", config->feature_timer);
01479          }
01480       }
01481       if (f)
01482          ast_frfree(f);
01483    }
01484    return res;
01485 }

int ast_masq_park_call struct ast_channel rchan,
struct ast_channel host,
int  timeout,
int *  extout
 

Park a call via a masqueraded channel.

Parameters:
rchan the real channel to be parked
host the channel to have the parking read to Masquerade the channel rchan into a new, empty channel which is then parked with ast_park_call
timeout is a timeout in milliseconds
extout is a parameter to an int that will hold the parked location, or NULL if you want

Definition at line 401 of file res_features.c.

References ast_channel_alloc(), ast_channel_masquerade(), ast_frfree(), ast_log(), ast_park_call(), ast_read(), ast_channel::context, ast_channel::exten, LOG_WARNING, ast_channel::name, ast_channel::priority, ast_channel::readformat, and ast_channel::writeformat.

Referenced by mgcp_ss(), parkandannounce_exec(), skinny_ss(), and ss_thread().

00402 {
00403    struct ast_channel *chan;
00404    struct ast_frame *f;
00405 
00406    /* Make a new, fake channel that we'll use to masquerade in the real one */
00407    chan = ast_channel_alloc(0);
00408    if (chan) {
00409       /* Let us keep track of the channel name */
00410       snprintf(chan->name, sizeof (chan->name), "Parked/%s",rchan->name);
00411 
00412       /* Make formats okay */
00413       chan->readformat = rchan->readformat;
00414       chan->writeformat = rchan->writeformat;
00415       ast_channel_masquerade(chan, rchan);
00416 
00417       /* Setup the extensions and such */
00418       ast_copy_string(chan->context, rchan->context, sizeof(chan->context));
00419       ast_copy_string(chan->exten, rchan->exten, sizeof(chan->exten));
00420       chan->priority = rchan->priority;
00421 
00422       /* Make the masq execute */
00423       f = ast_read(chan);
00424       if (f)
00425          ast_frfree(f);
00426       ast_park_call(chan, peer, timeout, extout);
00427    } else {
00428       ast_log(LOG_WARNING, "Unable to create parked channel\n");
00429       return -1;
00430    }
00431    return 0;
00432 }

int ast_park_call struct ast_channel chan,
struct ast_channel host,
int  timeout,
int *  extout
 

Park a call and read back parked location.

Parameters:
chan the channel to actually be parked
host the channel which will have the parked location read to Park the channel chan, and read back the parked location to the host. If the call is not picked up within a specified period of time, then the call will return to the last step that it was in (in terms of exten, priority and context)
timeout is a timeout in milliseconds
extout is a parameter to an int that will hold the parked location, or NULL if you want

Definition at line 278 of file res_features.c.

References ast_log(), AST_MAX_EXTENSION, ast_mutex_lock(), exten, LOG_WARNING, malloc, parkeduser::next, parkinglot, and parkeduser::parkingnum.

Referenced by ast_masq_park_call(), builtin_blindtransfer(), iax_park_thread(), park_call_exec(), and sip_park_thread().

00279 {
00280    struct parkeduser *pu, *cur;
00281    int i,x,parking_range;
00282    char exten[AST_MAX_EXTENSION];
00283    struct ast_context *con;
00284 
00285    pu = malloc(sizeof(struct parkeduser));
00286    if (!pu) {
00287       ast_log(LOG_WARNING, "Out of memory\n");
00288       return -1;
00289    }
00290    memset(pu, 0, sizeof(struct parkeduser));
00291    ast_mutex_lock(&parking_lock);
00292    parking_range = parking_stop - parking_start+1;
00293    for (i = 0; i < parking_range; i++) {
00294       x = (i + parking_offset) % parking_range + parking_start;
00295       cur = parkinglot;
00296       while(cur) {
00297          if (cur->parkingnum == x) 
00298             break;
00299          cur = cur->next;
00300       }
00301       if (!cur)
00302          break;
00303    }
00304 
00305    if (!(i < parking_range)) {
00306       ast_log(LOG_WARNING, "No more parking spaces\n");
00307       free(pu);
00308       ast_mutex_unlock(&parking_lock);
00309       return -1;
00310    }
00311    if (parkfindnext) 
00312       parking_offset = x - parking_start + 1;
00313    chan->appl = "Parked Call";
00314    chan->data = NULL; 
00315 
00316    pu->chan = chan;
00317    /* Start music on hold */
00318    if (chan != peer) {
00319       ast_indicate(pu->chan, AST_CONTROL_HOLD);
00320       ast_moh_start(pu->chan, NULL);
00321    }
00322    pu->start = ast_tvnow();
00323    pu->parkingnum = x;
00324    if (timeout > 0)
00325       pu->parkingtime = timeout;
00326    else
00327       pu->parkingtime = parkingtime;
00328    if (extout)
00329       *extout = x;
00330    if (peer) 
00331       ast_copy_string(pu->peername, peer->name, sizeof(pu->peername));
00332 
00333    /* Remember what had been dialed, so that if the parking
00334       expires, we try to come back to the same place */
00335    if (!ast_strlen_zero(chan->macrocontext))
00336       ast_copy_string(pu->context, chan->macrocontext, sizeof(pu->context));
00337    else
00338       ast_copy_string(pu->context, chan->context, sizeof(pu->context));
00339    if (!ast_strlen_zero(chan->macroexten))
00340       ast_copy_string(pu->exten, chan->macroexten, sizeof(pu->exten));
00341    else
00342       ast_copy_string(pu->exten, chan->exten, sizeof(pu->exten));
00343    if (chan->macropriority)
00344       pu->priority = chan->macropriority;
00345    else
00346       pu->priority = chan->priority;
00347    pu->next = parkinglot;
00348    parkinglot = pu;
00349    /* If parking a channel directly, don't quiet yet get parking running on it */
00350    if (peer == chan) 
00351       pu->notquiteyet = 1;
00352    ast_mutex_unlock(&parking_lock);
00353    /* Wake up the (presumably select()ing) thread */
00354    pthread_kill(parking_thread, SIGURG);
00355    if (option_verbose > 1) 
00356       ast_verbose(VERBOSE_PREFIX_2 "Parked %s on %d. Will timeout back to extension [%s] %s, %d in %d seconds\n", pu->chan->name, pu->parkingnum, pu->context, pu->exten, pu->priority, (pu->parkingtime/1000));
00357 
00358    manager_event(EVENT_FLAG_CALL, "ParkedCall",
00359       "Exten: %d\r\n"
00360       "Channel: %s\r\n"
00361       "From: %s\r\n"
00362       "Timeout: %ld\r\n"
00363       "CallerID: %s\r\n"
00364       "CallerIDName: %s\r\n"
00365       ,pu->parkingnum, pu->chan->name, peer ? peer->name : ""
00366       ,(long)pu->start.tv_sec + (long)(pu->parkingtime/1000) - (long)time(NULL)
00367       ,(pu->chan->cid.cid_num ? pu->chan->cid.cid_num : "<unknown>")
00368       ,(pu->chan->cid.cid_name ? pu->chan->cid.cid_name : "<unknown>")
00369       );
00370 
00371    if (peer) {
00372       if (adsipark && adsi_available(peer)) {
00373          adsi_announce_park(peer, pu->parkingnum);
00374       }
00375       if (adsipark && adsi_available(peer)) {
00376          adsi_unload_session(peer);
00377       }
00378    }
00379    con = ast_context_find(parking_con);
00380    if (!con) {
00381       con = ast_context_create(NULL, parking_con, registrar);
00382       if (!con) {
00383          ast_log(LOG_ERROR, "Parking context '%s' does not exist and unable to create\n", parking_con);
00384       }
00385    }
00386    if (con) {
00387       snprintf(exten, sizeof(exten), "%d", x);
00388       ast_add_extension2(con, 1, exten, 1, NULL, NULL, parkedcall, strdup(exten), FREE, registrar);
00389    }
00390    if (peer) 
00391       ast_say_digits(peer, pu->parkingnum, "", peer->language);
00392    if (pu->notquiteyet) {
00393       /* Wake up parking thread if we're really done */
00394       ast_moh_start(pu->chan, NULL);
00395       pu->notquiteyet = 0;
00396       pthread_kill(parking_thread, SIGURG);
00397    }
00398    return 0;
00399 }

char* ast_parking_ext void   ) 
 

Determine system parking extension Returns the call parking extension for drivers that provide special call parking help.

Definition at line 163 of file res_features.c.

Referenced by builtin_blindtransfer(), dp_lookup(), get_refer_info(), handle_request_refer(), load_config(), mgcp_ss(), skinny_ss(), socket_read(), and ss_thread().

00164 {
00165    return parking_ext;
00166 }

int ast_pickup_call struct ast_channel chan  ) 
 

Pickup a call.

Definition at line 1931 of file res_features.c.

References ast_channel::_state, ast_answer(), ast_channel_masquerade(), ast_channel_walk_locked(), AST_CONTROL_ANSWER, ast_log(), ast_mutex_unlock(), ast_queue_control(), AST_STATE_RING, AST_STATE_RINGING, ast_channel::callgroup, ast_channel::lock, LOG_DEBUG, LOG_WARNING, ast_channel::name, option_debug, ast_channel::pbx, and ast_channel::pickupgroup.

Referenced by cb_events(), handle_request_invite(), mgcp_ss(), monitor_handle_notowned(), skinny_ss(), and ss_thread().

01932 {
01933    struct ast_channel *cur = NULL;
01934    int res = -1;
01935 
01936    while ( (cur = ast_channel_walk_locked(cur)) != NULL) {
01937       if (!cur->pbx && 
01938          (cur != chan) &&
01939          (chan->pickupgroup & cur->callgroup) &&
01940          ((cur->_state == AST_STATE_RINGING) ||
01941           (cur->_state == AST_STATE_RING))) {
01942             break;
01943       }
01944       ast_mutex_unlock(&cur->lock);
01945    }
01946    if (cur) {
01947       if (option_debug)
01948          ast_log(LOG_DEBUG, "Call pickup on chan '%s' by '%s'\n",cur->name, chan->name);
01949       res = ast_answer(chan);
01950       if (res)
01951          ast_log(LOG_WARNING, "Unable to answer '%s'\n", chan->name);
01952       res = ast_queue_control(chan, AST_CONTROL_ANSWER);
01953       if (res)
01954          ast_log(LOG_WARNING, "Unable to queue answer on '%s'\n", chan->name);
01955       res = ast_channel_masquerade(cur, chan);
01956       if (res)
01957          ast_log(LOG_WARNING, "Unable to masquerade '%s' into '%s'\n", chan->name, cur->name);     /* Done */
01958       ast_mutex_unlock(&cur->lock);
01959    } else   {
01960       if (option_debug)
01961          ast_log(LOG_DEBUG, "No call pickup possible...\n");
01962    }
01963    return res;
01964 }

char* ast_pickup_ext void   ) 
 

Determine system call pickup extension.

Definition at line 168 of file res_features.c.

Referenced by cb_events(), get_destination(), handle_request_invite(), handle_showfeatures(), mgcp_ss(), monitor_handle_notowned(), skinny_ss(), and ss_thread().

00169 {
00170    return pickup_ext;
00171 }

void ast_register_feature struct ast_call_feature feature  ) 
 

register new feature into feature_set

Parameters:
feature an ast_call_feature object which contains a keysequence and a callback function which is called when this keysequence is pressed during a call.

Definition at line 875 of file res_features.c.

References AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_UNLOCK, ast_log(), ast_verbose(), LOG_NOTICE, option_verbose, ast_call_feature::sname, and VERBOSE_PREFIX_2.

Referenced by load_config().

00876 {
00877    if (!feature) {
00878       ast_log(LOG_NOTICE,"You didn't pass a feature!\n");
00879          return;
00880    }
00881   
00882    AST_LIST_LOCK(&feature_list);
00883    AST_LIST_INSERT_HEAD(&feature_list,feature,feature_entry);
00884    AST_LIST_UNLOCK(&feature_list);
00885 
00886    if (option_verbose >= 2) 
00887       ast_verbose(VERBOSE_PREFIX_2 "Registered Feature '%s'\n",feature->sname);
00888 }

void ast_unregister_feature struct ast_call_feature feature  ) 
 

unregister feature from feature_set

Parameters:
feature the ast_call_feature object which was registered before

Definition at line 891 of file res_features.c.

References AST_LIST_LOCK, AST_LIST_REMOVE, AST_LIST_UNLOCK, and free.

00892 {
00893    if (!feature) return;
00894 
00895    AST_LIST_LOCK(&feature_list);
00896    AST_LIST_REMOVE(&feature_list,feature,feature_entry);
00897    AST_LIST_UNLOCK(&feature_list);
00898    free(feature);
00899 }


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