Patch to icedemo.c that causes PJLIB to deadlock

deadlock.patch

diff --git a/pjsip-apps/src/samples/icedemo.c b/pjsip-apps/src/samples/icedemo.c
index 8dbba21..ed6fba9 100644
--- a/pjsip-apps/src/samples/icedemo.c
+++ b/pjsip-apps/src/samples/icedemo.c
@@ -72,6 +72,8 @@ static struct app_t
 
 } icedemo;
 
+pj_mutex_t *application_mutex;
+
 /* Utility to display error messages */
 static void icedemo_perror(const char *title, pj_status_t status)
 {
@@ -227,11 +229,12 @@ static void cb_on_rx_data(pj_ice_strans *ice_st,
     // Don't do this! It will ruin the packet buffer in case TCP is used!
     //((char*)pkt)[size] = '\0';
 
-    PJ_LOG(3,(THIS_FILE, "Component %d: received %d bytes data from %s: \"%.*s\"",
-             comp_id, size,
-             pj_sockaddr_print(src_addr, ipstr, sizeof(ipstr), 3),
-             (unsigned)size,
-             (char*)pkt));
+    pj_mutex_lock(application_mutex);
+
+    PJ_LOG(3,(THIS_FILE, "Data recvd"));
+
+    pj_mutex_unlock(application_mutex);
+
 }
 
 /*
@@ -993,13 +996,20 @@ static void icedemo_send_data(unsigned comp_id, const char *data)
        return;
     }
 
-    status = pj_ice_strans_sendto(icedemo.icest, comp_id, data, strlen(data),
-                                 &icedemo.rem.def_addr[comp_id-1],
-                                 pj_sockaddr_get_len(&icedemo.rem.def_addr[comp_id-1]));
-    if (status != PJ_SUCCESS)
-       icedemo_perror("Error sending data", status);
-    else
-       PJ_LOG(3,(THIS_FILE, "Data sent"));
+    while(1) {
+        pj_mutex_lock(application_mutex);
+
+        status = pj_ice_strans_sendto(icedemo.icest, comp_id, data, strlen(data),
+                                    &icedemo.rem.def_addr[comp_id-1],
+                                    pj_sockaddr_get_len(&icedemo.rem.def_addr[comp_id-1]));
+
+        pj_mutex_unlock(application_mutex);
+
+        if (status != PJ_SUCCESS)
+            icedemo_perror("Error sending data", status);
+        else
+            PJ_LOG(3,(THIS_FILE, "Data sent"));
+    }
 }
 
 
@@ -1265,8 +1275,12 @@ int main(int argc, char *argv[])
     if (status != PJ_SUCCESS)
        return 1;
 
+    pj_mutex_create_simple(icedemo.pool, NULL, &application_mutex);
+
     icedemo_console();
 
+    pj_mutex_destroy(&application_mutex);
+
     err_exit("Quitting..", PJ_SUCCESS);
     return 0;
 }