#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 316 of file autoservice.c.
References as_cond, and ast_cond_init().
Referenced by main().
00317 { 00318 ast_cond_init(&as_cond, NULL); 00319 }
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 189 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(), system_exec_helper(), and try_calling().
00190 { 00191 int res = 0; 00192 struct asent *as; 00193 00194 /* Check if the channel already has autoservice */ 00195 AST_LIST_LOCK(&aslist); 00196 AST_LIST_TRAVERSE(&aslist, as, list) { 00197 if (as->chan == chan) { 00198 as->use_count++; 00199 break; 00200 } 00201 } 00202 AST_LIST_UNLOCK(&aslist); 00203 00204 if (as) { 00205 /* Entry exists, autoservice is already handling this channel */ 00206 return 0; 00207 } 00208 00209 if (!(as = ast_calloc(1, sizeof(*as)))) 00210 return -1; 00211 00212 /* New entry created */ 00213 as->chan = chan; 00214 as->use_count = 1; 00215 00216 ast_channel_lock(chan); 00217 as->orig_end_dtmf_flag = ast_test_flag(chan, AST_FLAG_END_DTMF_ONLY) ? 1 : 0; 00218 if (!as->orig_end_dtmf_flag) 00219 ast_set_flag(chan, AST_FLAG_END_DTMF_ONLY); 00220 ast_channel_unlock(chan); 00221 00222 AST_LIST_LOCK(&aslist); 00223 00224 if (AST_LIST_EMPTY(&aslist) && asthread != AST_PTHREADT_NULL) { 00225 ast_cond_signal(&as_cond); 00226 } 00227 00228 AST_LIST_INSERT_HEAD(&aslist, as, list); 00229 00230 if (asthread == AST_PTHREADT_NULL) { /* need start the thread */ 00231 if (ast_pthread_create_background(&asthread, NULL, autoservice_run, NULL)) { 00232 ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n"); 00233 /* There will only be a single member in the list at this point, 00234 the one we just added. */ 00235 AST_LIST_REMOVE(&aslist, as, list); 00236 free(as); 00237 asthread = AST_PTHREADT_NULL; 00238 res = -1; 00239 } else { 00240 pthread_kill(asthread, SIGURG); 00241 } 00242 } 00243 00244 AST_LIST_UNLOCK(&aslist); 00245 00246 return res; 00247 }
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 249 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(), system_exec_helper(), and try_calling().
00250 { 00251 int res = -1; 00252 struct asent *as, *removed = NULL; 00253 struct ast_frame *f; 00254 int chan_list_state; 00255 00256 AST_LIST_LOCK(&aslist); 00257 00258 /* Save the autoservice channel list state. We _must_ verify that the channel 00259 * list has been rebuilt before we return. Because, after we return, the channel 00260 * could get destroyed and we don't want our poor autoservice thread to step on 00261 * it after its gone! */ 00262 chan_list_state = as_chan_list_state; 00263 00264 /* Find the entry, but do not free it because it still can be in the 00265 autoservice thread array */ 00266 AST_LIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) { 00267 if (as->chan == chan) { 00268 as->use_count--; 00269 if (as->use_count < 1) { 00270 AST_LIST_REMOVE_CURRENT(&aslist, list); 00271 removed = as; 00272 } 00273 break; 00274 } 00275 } 00276 AST_LIST_TRAVERSE_SAFE_END 00277 00278 if (removed && asthread != AST_PTHREADT_NULL) { 00279 pthread_kill(asthread, SIGURG); 00280 } 00281 00282 AST_LIST_UNLOCK(&aslist); 00283 00284 if (!removed) { 00285 return 0; 00286 } 00287 00288 /* Wait while autoservice thread rebuilds its list. */ 00289 while (chan_list_state == as_chan_list_state) { 00290 usleep(1000); 00291 } 00292 00293 /* Now autoservice thread should have no references to our entry 00294 and we can safely destroy it */ 00295 00296 if (!chan->_softhangup) { 00297 res = 0; 00298 } 00299 00300 if (!as->orig_end_dtmf_flag) { 00301 ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY); 00302 } 00303 00304 ast_channel_lock(chan); 00305 while ((f = AST_LIST_REMOVE_HEAD(&as->deferred_frames, frame_list))) { 00306 ast_queue_frame_head(chan, f); 00307 ast_frfree(f); 00308 } 00309 ast_channel_unlock(chan); 00310 00311 free(as); 00312 00313 return res; 00314 }
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_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, MAX_AUTOMONS, and ast_frame::subclass.
Referenced by ast_autoservice_start().
00079 { 00080 for (;;) { 00081 struct ast_channel *mons[MAX_AUTOMONS]; 00082 struct asent *ents[MAX_AUTOMONS]; 00083 struct ast_channel *chan; 00084 struct asent *as; 00085 int i, x = 0, ms = 50; 00086 struct ast_frame *f = NULL; 00087 struct ast_frame *defer_frame = NULL; 00088 00089 AST_LIST_LOCK(&aslist); 00090 00091 /* At this point, we know that no channels that have been removed are going 00092 * to get used again. */ 00093 as_chan_list_state++; 00094 00095 if (AST_LIST_EMPTY(&aslist)) { 00096 ast_cond_wait(&as_cond, &aslist.lock); 00097 } 00098 00099 AST_LIST_TRAVERSE(&aslist, as, list) { 00100 if (!as->chan->_softhangup) { 00101 if (x < MAX_AUTOMONS) { 00102 ents[x] = as; 00103 mons[x++] = as->chan; 00104 } else { 00105 ast_log(LOG_WARNING, "Exceeded maximum number of automatic monitoring events. Fix autoservice.c\n"); 00106 } 00107 } 00108 } 00109 00110 AST_LIST_UNLOCK(&aslist); 00111 00112 if (!x) { 00113 continue; 00114 } 00115 00116 chan = ast_waitfor_n(mons, x, &ms); 00117 if (!chan) { 00118 continue; 00119 } 00120 00121 f = ast_read(chan); 00122 00123 if (!f) { 00124 struct ast_frame hangup_frame = { 0, }; 00125 /* No frame means the channel has been hung up. 00126 * A hangup frame needs to be queued here as ast_waitfor() may 00127 * never return again for the condition to be detected outside 00128 * of autoservice. So, we'll leave a HANGUP queued up so the 00129 * thread in charge of this channel will know. */ 00130 00131 hangup_frame.frametype = AST_FRAME_CONTROL; 00132 hangup_frame.subclass = AST_CONTROL_HANGUP; 00133 00134 defer_frame = &hangup_frame; 00135 } else { 00136 00137 /* Do not add a default entry in this switch statement. Each new 00138 * frame type should be addressed directly as to whether it should 00139 * be queued up or not. */ 00140 00141 switch (f->frametype) { 00142 /* Save these frames */ 00143 case AST_FRAME_DTMF_END: 00144 case AST_FRAME_CONTROL: 00145 case AST_FRAME_TEXT: 00146 case AST_FRAME_IMAGE: 00147 case AST_FRAME_HTML: 00148 defer_frame = f; 00149 break; 00150 00151 /* Throw these frames away */ 00152 case AST_FRAME_DTMF_BEGIN: 00153 case AST_FRAME_VOICE: 00154 case AST_FRAME_VIDEO: 00155 case AST_FRAME_NULL: 00156 case AST_FRAME_IAX: 00157 case AST_FRAME_CNG: 00158 case AST_FRAME_MODEM: 00159 break; 00160 } 00161 } 00162 00163 if (defer_frame) { 00164 for (i = 0; i < x; i++) { 00165 struct ast_frame *dup_f; 00166 00167 if (mons[i] != chan) { 00168 continue; 00169 } 00170 00171 if ((dup_f = ast_frdup(defer_frame))) { 00172 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list); 00173 } 00174 00175 break; 00176 } 00177 } 00178 00179 if (f) { 00180 ast_frfree(f); 00181 } 00182 } 00183 00184 asthread = AST_PTHREADT_NULL; 00185 00186 return NULL; 00187 }
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().