#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 | |
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 autoservice.c
Definition at line 318 of file autoservice.c.
References as_cond, and ast_cond_init().
Referenced by main().
00319 { 00320 ast_cond_init(&as_cond, NULL); 00321 }
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 192 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_atxfer(), builtin_automixmonitor(), builtin_blindtransfer(), conf_play(), dial_exec_full(), feature_exec_app(), function_realtime_read(), function_realtime_readdestroy(), function_realtime_store(), function_realtime_write(), lock_read(), lua_autoservice_start(), lua_get_variable_value(), lua_pbx_exec(), lua_set_variable(), lua_set_variable_value(), osplookup_exec(), pbx_find_extension(), play_message_in_bridged_call(), shell_helper(), sla_station_exec(), smdi_msg_retrieve_read(), system_exec_helper(), and trylock_read().
00193 { 00194 int res = 0; 00195 struct asent *as; 00196 00197 AST_LIST_LOCK(&aslist); 00198 AST_LIST_TRAVERSE(&aslist, as, list) { 00199 if (as->chan == chan) { 00200 as->use_count++; 00201 break; 00202 } 00203 } 00204 AST_LIST_UNLOCK(&aslist); 00205 00206 if (as) { 00207 /* Entry exists, autoservice is already handling this channel */ 00208 return 0; 00209 } 00210 00211 if (!(as = ast_calloc(1, sizeof(*as)))) 00212 return -1; 00213 00214 /* New entry created */ 00215 as->chan = chan; 00216 as->use_count = 1; 00217 00218 ast_channel_lock(chan); 00219 as->orig_end_dtmf_flag = ast_test_flag(chan, AST_FLAG_END_DTMF_ONLY) ? 1 : 0; 00220 if (!as->orig_end_dtmf_flag) 00221 ast_set_flag(chan, AST_FLAG_END_DTMF_ONLY); 00222 ast_channel_unlock(chan); 00223 00224 AST_LIST_LOCK(&aslist); 00225 00226 if (AST_LIST_EMPTY(&aslist) && asthread != AST_PTHREADT_NULL) { 00227 ast_cond_signal(&as_cond); 00228 } 00229 00230 AST_LIST_INSERT_HEAD(&aslist, as, list); 00231 00232 if (asthread == AST_PTHREADT_NULL) { /* need start the thread */ 00233 if (ast_pthread_create_background(&asthread, NULL, autoservice_run, NULL)) { 00234 ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n"); 00235 /* There will only be a single member in the list at this point, 00236 the one we just added. */ 00237 AST_LIST_REMOVE(&aslist, as, list); 00238 free(as); 00239 asthread = AST_PTHREADT_NULL; 00240 res = -1; 00241 } else { 00242 pthread_kill(asthread, SIGURG); 00243 } 00244 } 00245 00246 AST_LIST_UNLOCK(&aslist); 00247 00248 return res; 00249 }
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 251 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::list, asent::orig_end_dtmf_flag, and asent::use_count.
Referenced by _macro_exec(), acf_curl_exec(), acf_odbc_write(), array(), ast_dtmf_stream(), ast_get_srv(), ast_get_txt(), ast_hangup(), bridge_playfile(), builtin_atxfer(), builtin_automixmonitor(), conf_play(), dial_exec_full(), feature_exec_app(), finishup(), function_realtime_read(), function_realtime_readdestroy(), function_realtime_store(), function_realtime_write(), lock_read(), lua_autoservice_stop(), lua_get_variable_value(), lua_pbx_exec(), lua_set_variable(), lua_set_variable_value(), osplookup_exec(), pbx_find_extension(), play_message_in_bridged_call(), shell_helper(), sla_station_exec(), smdi_msg_retrieve_read(), system_exec_helper(), and trylock_read().
00252 { 00253 int res = -1; 00254 struct asent *as, *removed = NULL; 00255 struct ast_frame *f; 00256 int chan_list_state; 00257 00258 AST_LIST_LOCK(&aslist); 00259 00260 /* Save the autoservice channel list state. We _must_ verify that the channel 00261 * list has been rebuilt before we return. Because, after we return, the channel 00262 * could get destroyed and we don't want our poor autoservice thread to step on 00263 * it after its gone! */ 00264 chan_list_state = as_chan_list_state; 00265 00266 /* Find the entry, but do not free it because it still can be in the 00267 autoservice thread array */ 00268 AST_LIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) { 00269 if (as->chan == chan) { 00270 as->use_count--; 00271 if (as->use_count < 1) { 00272 AST_LIST_REMOVE_CURRENT(list); 00273 removed = as; 00274 } 00275 break; 00276 } 00277 } 00278 AST_LIST_TRAVERSE_SAFE_END; 00279 00280 if (removed && asthread != AST_PTHREADT_NULL) { 00281 pthread_kill(asthread, SIGURG); 00282 } 00283 00284 AST_LIST_UNLOCK(&aslist); 00285 00286 if (!removed) { 00287 return 0; 00288 } 00289 00290 /* Wait while autoservice thread rebuilds its list. */ 00291 while (chan_list_state == as_chan_list_state) { 00292 usleep(1000); 00293 } 00294 00295 /* Now autoservice thread should have no references to our entry 00296 and we can safely destroy it */ 00297 00298 if (!chan->_softhangup) { 00299 res = 0; 00300 } 00301 00302 if (!as->orig_end_dtmf_flag) { 00303 ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY); 00304 } 00305 00306 ast_channel_lock(chan); 00307 while ((f = AST_LIST_REMOVE_HEAD(&as->deferred_frames, frame_list))) { 00308 ast_queue_frame_head(chan, f); 00309 ast_frfree(f); 00310 } 00311 ast_channel_unlock(chan); 00312 00313 free(as); 00314 00315 return res; 00316 }
static void* autoservice_run | ( | void * | ign | ) | [static] |
Definition at line 73 of file autoservice.c.
References ast_check_hangup(), 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::frametype, LOG_WARNING, and MAX_AUTOMONS.
Referenced by ast_autoservice_start().
00074 { 00075 struct ast_frame hangup_frame = { 00076 .frametype = AST_FRAME_CONTROL, 00077 .subclass = AST_CONTROL_HANGUP, 00078 }; 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 (!ast_check_hangup(as->chan)) { 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 /* No frame means the channel has been hung up. 00125 * A hangup frame needs to be queued here as ast_waitfor() may 00126 * never return again for the condition to be detected outside 00127 * of autoservice. So, we'll leave a HANGUP queued up so the 00128 * thread in charge of this channel will know. */ 00129 00130 defer_frame = &hangup_frame; 00131 } else { 00132 00133 /* Do not add a default entry in this switch statement. Each new 00134 * frame type should be addressed directly as to whether it should 00135 * be queued up or not. */ 00136 00137 switch (f->frametype) { 00138 /* Save these frames */ 00139 case AST_FRAME_DTMF_END: 00140 case AST_FRAME_CONTROL: 00141 case AST_FRAME_TEXT: 00142 case AST_FRAME_IMAGE: 00143 case AST_FRAME_HTML: 00144 defer_frame = f; 00145 break; 00146 00147 /* Throw these frames away */ 00148 case AST_FRAME_DTMF_BEGIN: 00149 case AST_FRAME_VOICE: 00150 case AST_FRAME_VIDEO: 00151 case AST_FRAME_NULL: 00152 case AST_FRAME_IAX: 00153 case AST_FRAME_CNG: 00154 case AST_FRAME_MODEM: 00155 break; 00156 } 00157 } 00158 00159 if (defer_frame) { 00160 for (i = 0; i < x; i++) { 00161 struct ast_frame *dup_f; 00162 00163 if (mons[i] != chan) { 00164 continue; 00165 } 00166 00167 if (defer_frame != f) { 00168 if ((dup_f = ast_frdup(defer_frame))) { 00169 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list); 00170 } 00171 } else { 00172 if ((dup_f = ast_frisolate(defer_frame))) { 00173 if (dup_f != defer_frame) { 00174 ast_frfree(defer_frame); 00175 } 00176 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list); 00177 } 00178 } 00179 00180 break; 00181 } 00182 } else if (f) { 00183 ast_frfree(f); 00184 } 00185 } 00186 00187 asthread = AST_PTHREADT_NULL; 00188 00189 return NULL; 00190 }
int as_chan_list_state [static] |
ast_cond_t as_cond [static] |
Definition at line 67 of file autoservice.c.
Referenced by ast_autoservice_init(), and ast_autoservice_start().
pthread_t asthread = AST_PTHREADT_NULL [static] |
Definition at line 69 of file autoservice.c.
Referenced by ast_autoservice_start(), ast_autoservice_stop(), and autoservice_run().