#include "asterisk.h"
#include <sys/time.h>
#include <signal.h>
#include "asterisk/_private.h"
#include "asterisk/pbx.h"
#include "asterisk/frame.h"
#include "asterisk/sched.h"
#include "asterisk/channel.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 | |
int | ast_autoservice_ignore (struct ast_channel *chan, enum ast_frame_type ftype) |
Ignore certain frame types. | |
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 |
int ast_autoservice_ignore | ( | struct ast_channel * | chan, | |
enum ast_frame_type | ftype | |||
) |
Ignore certain frame types.
0 | success | |
-1 | channel is not in autoservice |
Definition at line 302 of file autoservice.c.
References AST_LIST_LOCK, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, asent::chan, asent::ignore_frame_types, and asent::list.
Referenced by builtin_automixmonitor(), builtin_blindtransfer(), feature_exec_app(), and play_message_in_bridged_call().
00303 { 00304 struct asent *as; 00305 int res = -1; 00306 00307 AST_LIST_LOCK(&aslist); 00308 AST_LIST_TRAVERSE(&aslist, as, list) { 00309 if (as->chan == chan) { 00310 res = 0; 00311 as->ignore_frame_types |= (1 << ftype); 00312 break; 00313 } 00314 } 00315 AST_LIST_UNLOCK(&aslist); 00316 return res; 00317 }
void ast_autoservice_init | ( | void | ) |
Provided by autoservice.c
Definition at line 319 of file autoservice.c.
References as_cond, and ast_cond_init.
Referenced by main().
00320 { 00321 ast_cond_init(&as_cond, NULL); 00322 }
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 174 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_helper(), acf_jabberreceive_read(), acf_odbc_read(), acf_odbc_write(), ast_app_run_macro(), ast_dtmf_stream(), ast_get_enum(), ast_get_srv(), ast_get_txt(), bridge_playfile(), builtin_atxfer(), builtin_automixmonitor(), builtin_blindtransfer(), conf_play(), confbridge_exec(), dial_exec_full(), feature_exec_app(), feature_request_and_dial(), function_realtime_read(), function_realtime_readdestroy(), function_realtime_store(), function_realtime_write(), leave_conference_bridge(), lock_read(), lua_autoservice_start(), lua_get_variable_value(), lua_pbx_exec(), lua_set_variable(), lua_set_variable_value(), originate_exec(), osplookup_exec(), pbx_find_extension(), play_message_in_bridged_call(), post_join_marked(), realtimefield_read(), senddtmf_exec(), shell_helper(), sla_station_exec(), smdi_msg_retrieve_read(), srv_datastore_setup(), system_exec_helper(), and trylock_read().
00175 { 00176 int res = 0; 00177 struct asent *as; 00178 00179 AST_LIST_LOCK(&aslist); 00180 AST_LIST_TRAVERSE(&aslist, as, list) { 00181 if (as->chan == chan) { 00182 as->use_count++; 00183 break; 00184 } 00185 } 00186 AST_LIST_UNLOCK(&aslist); 00187 00188 if (as) { 00189 /* Entry exists, autoservice is already handling this channel */ 00190 return 0; 00191 } 00192 00193 if (!(as = ast_calloc(1, sizeof(*as)))) 00194 return -1; 00195 00196 /* New entry created */ 00197 as->chan = chan; 00198 as->use_count = 1; 00199 00200 ast_channel_lock(chan); 00201 as->orig_end_dtmf_flag = ast_test_flag(chan, AST_FLAG_END_DTMF_ONLY) ? 1 : 0; 00202 if (!as->orig_end_dtmf_flag) 00203 ast_set_flag(chan, AST_FLAG_END_DTMF_ONLY); 00204 ast_channel_unlock(chan); 00205 00206 AST_LIST_LOCK(&aslist); 00207 00208 if (AST_LIST_EMPTY(&aslist) && asthread != AST_PTHREADT_NULL) { 00209 ast_cond_signal(&as_cond); 00210 } 00211 00212 AST_LIST_INSERT_HEAD(&aslist, as, list); 00213 00214 if (asthread == AST_PTHREADT_NULL) { /* need start the thread */ 00215 if (ast_pthread_create_background(&asthread, NULL, autoservice_run, NULL)) { 00216 ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n"); 00217 /* There will only be a single member in the list at this point, 00218 the one we just added. */ 00219 AST_LIST_REMOVE(&aslist, as, list); 00220 free(as); 00221 asthread = AST_PTHREADT_NULL; 00222 res = -1; 00223 } else { 00224 pthread_kill(asthread, SIGURG); 00225 } 00226 } 00227 00228 AST_LIST_UNLOCK(&aslist); 00229 00230 return res; 00231 }
int ast_autoservice_stop | ( | struct ast_channel * | chan | ) |
Stop servicing a channel for us...
chan |
0 | success | |
-1 | error, or the channel has been hungup |
Definition at line 233 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, free, asent::ignore_frame_types, asent::list, asent::orig_end_dtmf_flag, and asent::use_count.
Referenced by _macro_exec(), acf_curl_helper(), acf_jabberreceive_read(), acf_odbc_read(), acf_odbc_write(), array(), ast_app_run_macro(), ast_dtmf_stream(), ast_get_srv(), ast_get_txt(), ast_hangup(), bridge_playfile(), builtin_atxfer(), builtin_automixmonitor(), conf_play(), confbridge_exec(), dial_exec_full(), feature_exec_app(), feature_request_and_dial(), finishup(), function_realtime_read(), function_realtime_readdestroy(), function_realtime_store(), function_realtime_write(), leave_conference_bridge(), lock_read(), lua_autoservice_stop(), lua_get_variable_value(), lua_pbx_exec(), lua_set_variable(), lua_set_variable_value(), originate_exec(), osplookup_exec(), pbx_find_extension(), play_message_in_bridged_call(), post_join_marked(), realtimefield_read(), senddtmf_exec(), shell_helper(), sla_station_exec(), smdi_msg_retrieve_read(), srv_datastore_setup(), system_exec_helper(), and trylock_read().
00234 { 00235 int res = -1; 00236 struct asent *as, *removed = NULL; 00237 struct ast_frame *f; 00238 int chan_list_state; 00239 00240 AST_LIST_LOCK(&aslist); 00241 00242 /* Save the autoservice channel list state. We _must_ verify that the channel 00243 * list has been rebuilt before we return. Because, after we return, the channel 00244 * could get destroyed and we don't want our poor autoservice thread to step on 00245 * it after its gone! */ 00246 chan_list_state = as_chan_list_state; 00247 00248 /* Find the entry, but do not free it because it still can be in the 00249 autoservice thread array */ 00250 AST_LIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) { 00251 if (as->chan == chan) { 00252 as->use_count--; 00253 if (as->use_count < 1) { 00254 AST_LIST_REMOVE_CURRENT(list); 00255 removed = as; 00256 } 00257 break; 00258 } 00259 } 00260 AST_LIST_TRAVERSE_SAFE_END; 00261 00262 if (removed && asthread != AST_PTHREADT_NULL) { 00263 pthread_kill(asthread, SIGURG); 00264 } 00265 00266 AST_LIST_UNLOCK(&aslist); 00267 00268 if (!removed) { 00269 return 0; 00270 } 00271 00272 /* Wait while autoservice thread rebuilds its list. */ 00273 while (chan_list_state == as_chan_list_state) { 00274 usleep(1000); 00275 } 00276 00277 /* Now autoservice thread should have no references to our entry 00278 and we can safely destroy it */ 00279 00280 if (!chan->_softhangup) { 00281 res = 0; 00282 } 00283 00284 if (!as->orig_end_dtmf_flag) { 00285 ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY); 00286 } 00287 00288 ast_channel_lock(chan); 00289 while ((f = AST_LIST_REMOVE_HEAD(&as->deferred_frames, frame_list))) { 00290 if (!((1 << f->frametype) & as->ignore_frame_types)) { 00291 ast_queue_frame_head(chan, f); 00292 } 00293 ast_frfree(f); 00294 } 00295 ast_channel_unlock(chan); 00296 00297 free(as); 00298 00299 return res; 00300 }
static void* autoservice_run | ( | void * | ign | ) | [static] |
Definition at line 74 of file autoservice.c.
References ast_check_hangup(), ast_cond_wait, AST_CONTROL_HANGUP, AST_FRAME_CONTROL, ast_frdup(), ast_frfree, ast_frisolate(), ast_is_deferrable_frame(), 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::frametype, LOG_WARNING, and MAX_AUTOMONS.
Referenced by ast_autoservice_start().
00075 { 00076 struct ast_frame hangup_frame = { 00077 .frametype = AST_FRAME_CONTROL, 00078 .subclass.integer = AST_CONTROL_HANGUP, 00079 }; 00080 00081 for (;;) { 00082 struct ast_channel *mons[MAX_AUTOMONS]; 00083 struct asent *ents[MAX_AUTOMONS]; 00084 struct ast_channel *chan; 00085 struct asent *as; 00086 int i, x = 0, ms = 50; 00087 struct ast_frame *f = NULL; 00088 struct ast_frame *defer_frame = NULL; 00089 00090 AST_LIST_LOCK(&aslist); 00091 00092 /* At this point, we know that no channels that have been removed are going 00093 * to get used again. */ 00094 as_chan_list_state++; 00095 00096 if (AST_LIST_EMPTY(&aslist)) { 00097 ast_cond_wait(&as_cond, &aslist.lock); 00098 } 00099 00100 AST_LIST_TRAVERSE(&aslist, as, list) { 00101 if (!ast_check_hangup(as->chan)) { 00102 if (x < MAX_AUTOMONS) { 00103 ents[x] = as; 00104 mons[x++] = as->chan; 00105 } else { 00106 ast_log(LOG_WARNING, "Exceeded maximum number of automatic monitoring events. Fix autoservice.c\n"); 00107 } 00108 } 00109 } 00110 00111 AST_LIST_UNLOCK(&aslist); 00112 00113 if (!x) { 00114 /* If we don't sleep, this becomes a busy loop, which causes 00115 * problems when Asterisk runs at a different priority than other 00116 * user processes. As long as we check for new channels at least 00117 * once every 10ms, we should be fine. */ 00118 usleep(10000); 00119 continue; 00120 } 00121 00122 chan = ast_waitfor_n(mons, x, &ms); 00123 if (!chan) { 00124 continue; 00125 } 00126 00127 f = ast_read(chan); 00128 00129 if (!f) { 00130 /* No frame means the channel has been hung up. 00131 * A hangup frame needs to be queued here as ast_waitfor() may 00132 * never return again for the condition to be detected outside 00133 * of autoservice. So, we'll leave a HANGUP queued up so the 00134 * thread in charge of this channel will know. */ 00135 00136 defer_frame = &hangup_frame; 00137 } else if (ast_is_deferrable_frame(f)) { 00138 defer_frame = f; 00139 } 00140 00141 if (defer_frame) { 00142 for (i = 0; i < x; i++) { 00143 struct ast_frame *dup_f; 00144 00145 if (mons[i] != chan) { 00146 continue; 00147 } 00148 00149 if (defer_frame != f) { 00150 if ((dup_f = ast_frdup(defer_frame))) { 00151 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list); 00152 } 00153 } else { 00154 if ((dup_f = ast_frisolate(defer_frame))) { 00155 if (dup_f != defer_frame) { 00156 ast_frfree(defer_frame); 00157 } 00158 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list); 00159 } 00160 } 00161 00162 break; 00163 } 00164 } else if (f) { 00165 ast_frfree(f); 00166 } 00167 } 00168 00169 asthread = AST_PTHREADT_NULL; 00170 00171 return NULL; 00172 }
int as_chan_list_state [static] |
ast_cond_t as_cond [static] |
Definition at line 68 of file autoservice.c.
Referenced by ast_autoservice_init(), and ast_autoservice_start().
pthread_t asthread = AST_PTHREADT_NULL [static] |
Definition at line 70 of file autoservice.c.
Referenced by ast_autoservice_start(), ast_autoservice_stop(), and autoservice_run().