#include "asterisk.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include "asterisk/pbx.h"
#include "asterisk/frame.h"
#include "asterisk/sched.h"
#include "asterisk/options.h"
#include "asterisk/channel.h"
#include "asterisk/logger.h"
#include "asterisk/file.h"
#include "asterisk/translate.h"
#include "asterisk/manager.h"
#include "asterisk/chanvars.h"
#include "asterisk/linkedlists.h"
#include "asterisk/indications.h"
#include "asterisk/lock.h"
#include "asterisk/utils.h"
Go to the source code of this file.
Data Structures | |
struct | asent |
struct | aslist |
Defines | |
#define | MAX_AUTOMONS 1500 |
Functions | |
void | ast_autoservice_init (void) |
int | ast_autoservice_start (struct ast_channel *chan) |
Automatically service a channel for us... | |
int | ast_autoservice_stop (struct ast_channel *chan) |
Stop servicing a channel for us... | |
static void * | autoservice_run (void *ign) |
Variables | |
static int | as_chan_list_state |
static ast_cond_t | as_cond |
static pthread_t | asthread = AST_PTHREADT_NULL |
Russell Bryant <russell@digium.com>
Definition in file autoservice.c.
#define MAX_AUTOMONS 1500 |
void ast_autoservice_init | ( | void | ) |
Provided by astobj2.c Provided by autoservice.c
Definition at line 324 of file autoservice.c.
References as_cond, and ast_cond_init().
Referenced by main().
00325 { 00326 ast_cond_init(&as_cond, NULL); 00327 }
int ast_autoservice_start | ( | struct ast_channel * | chan | ) |
Automatically service a channel for us...
0 | success | |
-1 | failure, or the channel is already being autoserviced |
Definition at line 197 of file autoservice.c.
References as_cond, ast_calloc, ast_channel_lock, ast_channel_unlock, ast_cond_signal(), AST_FLAG_END_DTMF_ONLY, AST_LIST_EMPTY, AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_REMOVE, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, ast_log(), ast_pthread_create_background, AST_PTHREADT_NULL, ast_set_flag, ast_test_flag, asthread, autoservice_run(), asent::chan, free, asent::list, LOG_WARNING, and asent::use_count.
Referenced by _macro_exec(), acf_curl_exec(), acf_odbc_read(), acf_odbc_write(), ast_dtmf_stream(), ast_get_enum(), ast_get_srv(), ast_get_txt(), bridge_playfile(), builtin_automonitor(), builtin_blindtransfer(), conf_play(), do_atxfer(), feature_exec_app(), function_realtime_read(), function_realtime_write(), osplookup_exec(), sla_station_exec(), smdi_msg_retrieve_read(), and system_exec_helper().
00198 { 00199 int res = 0; 00200 struct asent *as; 00201 00202 /* Check if the channel already has autoservice */ 00203 AST_LIST_LOCK(&aslist); 00204 AST_LIST_TRAVERSE(&aslist, as, list) { 00205 if (as->chan == chan) { 00206 as->use_count++; 00207 break; 00208 } 00209 } 00210 AST_LIST_UNLOCK(&aslist); 00211 00212 if (as) { 00213 /* Entry exists, autoservice is already handling this channel */ 00214 return 0; 00215 } 00216 00217 if (!(as = ast_calloc(1, sizeof(*as)))) 00218 return -1; 00219 00220 /* New entry created */ 00221 as->chan = chan; 00222 as->use_count = 1; 00223 00224 ast_channel_lock(chan); 00225 as->orig_end_dtmf_flag = ast_test_flag(chan, AST_FLAG_END_DTMF_ONLY) ? 1 : 0; 00226 if (!as->orig_end_dtmf_flag) 00227 ast_set_flag(chan, AST_FLAG_END_DTMF_ONLY); 00228 ast_channel_unlock(chan); 00229 00230 AST_LIST_LOCK(&aslist); 00231 00232 if (AST_LIST_EMPTY(&aslist) && asthread != AST_PTHREADT_NULL) { 00233 ast_cond_signal(&as_cond); 00234 } 00235 00236 AST_LIST_INSERT_HEAD(&aslist, as, list); 00237 00238 if (asthread == AST_PTHREADT_NULL) { /* need start the thread */ 00239 if (ast_pthread_create_background(&asthread, NULL, autoservice_run, NULL)) { 00240 ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n"); 00241 /* There will only be a single member in the list at this point, 00242 the one we just added. */ 00243 AST_LIST_REMOVE(&aslist, as, list); 00244 free(as); 00245 asthread = AST_PTHREADT_NULL; 00246 res = -1; 00247 } else { 00248 pthread_kill(asthread, SIGURG); 00249 } 00250 } 00251 00252 AST_LIST_UNLOCK(&aslist); 00253 00254 return res; 00255 }
int ast_autoservice_stop | ( | struct ast_channel * | chan | ) |
Stop servicing a channel for us...
0 | success | |
-1 | error, or the channel has been hungup |
Definition at line 257 of file autoservice.c.
References ast_channel::_softhangup, as_chan_list_state, ast_channel_lock, ast_channel_unlock, ast_clear_flag, AST_FLAG_END_DTMF_ONLY, ast_frfree, AST_LIST_LOCK, AST_LIST_REMOVE_CURRENT, AST_LIST_REMOVE_HEAD, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, AST_LIST_UNLOCK, AST_PTHREADT_NULL, ast_queue_frame_head(), asthread, asent::chan, asent::deferred_frames, f, ast_frame::frame_list, free, asent::list, asent::orig_end_dtmf_flag, and asent::use_count.
Referenced by _macro_exec(), acf_curl_exec(), acf_odbc_read(), acf_odbc_write(), ast_dtmf_stream(), ast_get_srv(), ast_get_txt(), ast_hangup(), bridge_playfile(), builtin_automonitor(), conf_play(), do_atxfer(), feature_exec_app(), finishup(), function_realtime_read(), function_realtime_write(), osplookup_exec(), sla_station_exec(), smdi_msg_retrieve_read(), and system_exec_helper().
00258 { 00259 int res = -1; 00260 struct asent *as, *removed = NULL; 00261 struct ast_frame *f; 00262 int chan_list_state; 00263 00264 AST_LIST_LOCK(&aslist); 00265 00266 /* Save the autoservice channel list state. We _must_ verify that the channel 00267 * list has been rebuilt before we return. Because, after we return, the channel 00268 * could get destroyed and we don't want our poor autoservice thread to step on 00269 * it after its gone! */ 00270 chan_list_state = as_chan_list_state; 00271 00272 /* Find the entry, but do not free it because it still can be in the 00273 autoservice thread array */ 00274 AST_LIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) { 00275 if (as->chan == chan) { 00276 as->use_count--; 00277 if (as->use_count < 1) { 00278 AST_LIST_REMOVE_CURRENT(&aslist, list); 00279 removed = as; 00280 } 00281 break; 00282 } 00283 } 00284 AST_LIST_TRAVERSE_SAFE_END 00285 00286 if (removed && asthread != AST_PTHREADT_NULL) { 00287 pthread_kill(asthread, SIGURG); 00288 } 00289 00290 AST_LIST_UNLOCK(&aslist); 00291 00292 if (!removed) { 00293 return 0; 00294 } 00295 00296 /* Wait while autoservice thread rebuilds its list. */ 00297 while (chan_list_state == as_chan_list_state) { 00298 usleep(1000); 00299 } 00300 00301 /* Now autoservice thread should have no references to our entry 00302 and we can safely destroy it */ 00303 00304 if (!chan->_softhangup) { 00305 res = 0; 00306 } 00307 00308 if (!as->orig_end_dtmf_flag) { 00309 ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY); 00310 } 00311 00312 ast_channel_lock(chan); 00313 while ((f = AST_LIST_REMOVE_HEAD(&as->deferred_frames, frame_list))) { 00314 ast_queue_frame_head(chan, f); 00315 ast_frfree(f); 00316 } 00317 ast_channel_unlock(chan); 00318 00319 free(as); 00320 00321 return res; 00322 }
static void* autoservice_run | ( | void * | ign | ) | [static] |
Definition at line 78 of file autoservice.c.
References ast_channel::_softhangup, ast_cond_wait(), AST_CONTROL_HANGUP, AST_FRAME_CNG, AST_FRAME_CONTROL, AST_FRAME_DTMF_BEGIN, AST_FRAME_DTMF_END, AST_FRAME_HTML, AST_FRAME_IAX, AST_FRAME_IMAGE, AST_FRAME_MODEM, AST_FRAME_NULL, AST_FRAME_TEXT, AST_FRAME_VIDEO, AST_FRAME_VOICE, ast_frdup(), ast_frfree, ast_frisolate(), AST_LIST_EMPTY, AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, ast_log(), ast_read(), ast_waitfor_n(), asthread, asent::chan, asent::deferred_frames, f, ast_frame::frame_list, ast_frame::frametype, LOG_WARNING, and MAX_AUTOMONS.
Referenced by ast_autoservice_start().
00079 { 00080 struct ast_frame hangup_frame = { 00081 .frametype = AST_FRAME_CONTROL, 00082 .subclass = AST_CONTROL_HANGUP, 00083 }; 00084 00085 for (;;) { 00086 struct ast_channel *mons[MAX_AUTOMONS]; 00087 struct asent *ents[MAX_AUTOMONS]; 00088 struct ast_channel *chan; 00089 struct asent *as; 00090 int i, x = 0, ms = 50; 00091 struct ast_frame *f = NULL; 00092 struct ast_frame *defer_frame = NULL; 00093 00094 AST_LIST_LOCK(&aslist); 00095 00096 /* At this point, we know that no channels that have been removed are going 00097 * to get used again. */ 00098 as_chan_list_state++; 00099 00100 if (AST_LIST_EMPTY(&aslist)) { 00101 ast_cond_wait(&as_cond, &aslist.lock); 00102 } 00103 00104 AST_LIST_TRAVERSE(&aslist, as, list) { 00105 if (!as->chan->_softhangup) { 00106 if (x < MAX_AUTOMONS) { 00107 ents[x] = as; 00108 mons[x++] = as->chan; 00109 } else { 00110 ast_log(LOG_WARNING, "Exceeded maximum number of automatic monitoring events. Fix autoservice.c\n"); 00111 } 00112 } 00113 } 00114 00115 AST_LIST_UNLOCK(&aslist); 00116 00117 if (!x) { 00118 continue; 00119 } 00120 00121 chan = ast_waitfor_n(mons, x, &ms); 00122 if (!chan) { 00123 continue; 00124 } 00125 00126 f = ast_read(chan); 00127 00128 if (!f) { 00129 /* No frame means the channel has been hung up. 00130 * A hangup frame needs to be queued here as ast_waitfor() may 00131 * never return again for the condition to be detected outside 00132 * of autoservice. So, we'll leave a HANGUP queued up so the 00133 * thread in charge of this channel will know. */ 00134 00135 defer_frame = &hangup_frame; 00136 } else { 00137 00138 /* Do not add a default entry in this switch statement. Each new 00139 * frame type should be addressed directly as to whether it should 00140 * be queued up or not. */ 00141 00142 switch (f->frametype) { 00143 /* Save these frames */ 00144 case AST_FRAME_DTMF_END: 00145 case AST_FRAME_CONTROL: 00146 case AST_FRAME_TEXT: 00147 case AST_FRAME_IMAGE: 00148 case AST_FRAME_HTML: 00149 defer_frame = f; 00150 break; 00151 00152 /* Throw these frames away */ 00153 case AST_FRAME_DTMF_BEGIN: 00154 case AST_FRAME_VOICE: 00155 case AST_FRAME_VIDEO: 00156 case AST_FRAME_NULL: 00157 case AST_FRAME_IAX: 00158 case AST_FRAME_CNG: 00159 case AST_FRAME_MODEM: 00160 break; 00161 } 00162 } 00163 00164 if (defer_frame) { 00165 for (i = 0; i < x; i++) { 00166 struct ast_frame *dup_f; 00167 00168 if (mons[i] != chan) { 00169 continue; 00170 } 00171 00172 if (defer_frame != f) { 00173 if ((dup_f = ast_frdup(defer_frame))) { 00174 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list); 00175 } 00176 } else { 00177 if ((dup_f = ast_frisolate(defer_frame))) { 00178 if (dup_f != defer_frame) { 00179 ast_frfree(defer_frame); 00180 } 00181 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list); 00182 } 00183 } 00184 00185 break; 00186 } 00187 } else if (f) { 00188 ast_frfree(f); 00189 } 00190 } 00191 00192 asthread = AST_PTHREADT_NULL; 00193 00194 return NULL; 00195 }
int as_chan_list_state [static] |
ast_cond_t as_cond [static] |
Definition at line 72 of file autoservice.c.
Referenced by ast_autoservice_init(), and ast_autoservice_start().
pthread_t asthread = AST_PTHREADT_NULL [static] |
Definition at line 74 of file autoservice.c.
Referenced by ast_autoservice_start(), ast_autoservice_stop(), and autoservice_run().