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00014 #include <stdio.h>
00015 #include <stdlib.h>
00016 #include <string.h>
00017 #include <sys/time.h>
00018 #include <signal.h>
00019 #include <errno.h>
00020 #include <unistd.h>
00021 #include <math.h>
00022 #include <asterisk/pbx.h>
00023 #include <asterisk/frame.h>
00024 #include <asterisk/sched.h>
00025 #include <asterisk/options.h>
00026 #include <asterisk/channel.h>
00027 #include <asterisk/channel_pvt.h>
00028 #include <asterisk/logger.h>
00029 #include <asterisk/file.h>
00030 #include <asterisk/translate.h>
00031 #include <asterisk/manager.h>
00032 #include <asterisk/chanvars.h>
00033 #include <asterisk/linkedlists.h>
00034 #include <asterisk/indications.h>
00035 #include <asterisk/lock.h>
00036 #include <asterisk/utils.h>
00037
00038 #define MAX_AUTOMONS 256
00039
00040 AST_MUTEX_DEFINE_STATIC(autolock);
00041
00042 struct asent {
00043 struct ast_channel *chan;
00044 struct asent *next;
00045 };
00046
00047 static struct asent *aslist = NULL;
00048 static pthread_t asthread = AST_PTHREADT_NULL;
00049
00050 static void *autoservice_run(void *ign)
00051 {
00052 struct ast_channel *mons[MAX_AUTOMONS];
00053 int x;
00054 int ms;
00055 struct ast_channel *chan;
00056 struct asent *as;
00057 struct ast_frame *f;
00058 for(;;) {
00059 x = 0;
00060 ast_mutex_lock(&autolock);
00061 as = aslist;
00062 while(as) {
00063 if (!as->chan->_softhangup) {
00064 if (x < MAX_AUTOMONS)
00065 mons[x++] = as->chan;
00066 else
00067 ast_log(LOG_WARNING, "Exceeded maximum number of automatic monitoring events. Fix autoservice.c\n");
00068 }
00069 as = as->next;
00070 }
00071 ast_mutex_unlock(&autolock);
00072
00073
00074
00075 ms = 500;
00076 chan = ast_waitfor_n(mons, x, &ms);
00077 if (chan) {
00078
00079 f = ast_read(chan);
00080 if (f)
00081 ast_frfree(f);
00082 }
00083 }
00084 asthread = AST_PTHREADT_NULL;
00085 return NULL;
00086 }
00087
00088 int ast_autoservice_start(struct ast_channel *chan)
00089 {
00090 int res = -1;
00091 struct asent *as;
00092 int needstart;
00093 ast_mutex_lock(&autolock);
00094 needstart = (asthread == AST_PTHREADT_NULL) ? 1 : 0 ;
00095 as = aslist;
00096 while(as) {
00097 if (as->chan == chan)
00098 break;
00099 as = as->next;
00100 }
00101 if (!as) {
00102 as = malloc(sizeof(struct asent));
00103 if (as) {
00104 memset(as, 0, sizeof(struct asent));
00105 as->chan = chan;
00106 as->next = aslist;
00107 aslist = as;
00108 res = 0;
00109 if (needstart) {
00110 if (ast_pthread_create(&asthread, NULL, autoservice_run, NULL)) {
00111 ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n");
00112 free(aslist);
00113 aslist = NULL;
00114 res = -1;
00115 } else
00116 pthread_kill(asthread, SIGURG);
00117 }
00118 }
00119 }
00120 ast_mutex_unlock(&autolock);
00121 return res;
00122 }
00123
00124 int ast_autoservice_stop(struct ast_channel *chan)
00125 {
00126 int res = -1;
00127 struct asent *as, *prev;
00128 ast_mutex_lock(&autolock);
00129 as = aslist;
00130 prev = NULL;
00131 while(as) {
00132 if (as->chan == chan)
00133 break;
00134 prev = as;
00135 as = as->next;
00136 }
00137 if (as) {
00138 if (prev)
00139 prev->next = as->next;
00140 else
00141 aslist = as->next;
00142 free(as);
00143 if (!chan->_softhangup)
00144 res = 0;
00145 }
00146 if (asthread != AST_PTHREADT_NULL)
00147 pthread_kill(asthread, SIGURG);
00148 ast_mutex_unlock(&autolock);
00149
00150 while(chan->blocking)
00151 usleep(1000);
00152 return res;
00153 }