From 39186370a880b3c0fe70cf112b097c7957815f17 Mon Sep 17 00:00:00 2001
From: Giso Grimm <g.grimm@uni-oldenburg.de>
Date: Tue, 14 May 2024 12:26:30 +0200
Subject: [PATCH] try to prevent segmentation fault in osc_server when
 unloading

---
 libtascar/include/osc_helper.h     | 7 ++++---
 libtascar/src/osc_helper.cc        | 7 ++++---
 libtascar/src/session_reader.cc    | 5 ++++-
 plugins/src/tascarmod_oscserver.cc | 7 ++++---
 4 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/libtascar/include/osc_helper.h b/libtascar/include/osc_helper.h
index 16fc6613..05a75844 100644
--- a/libtascar/include/osc_helper.h
+++ b/libtascar/include/osc_helper.h
@@ -8,6 +8,7 @@
 /* License (GPL)
  *
  * Copyright (C) 2018  Giso Grimm
+ * Copyright (C) 2024  Giso Grimm
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -315,9 +316,9 @@ namespace TASCAR {
     std::string osc_srv_url;
     std::string prefix;
     lo_server_thread lost;
-    bool initialized;
-    bool isactive;
-    bool verbose;
+    std::atomic_bool initialized = false;
+    std::atomic_bool isactive = false;
+    bool verbose = false;
     std::map<std::string, data_element_t> datamap;
     std::atomic<bool> runscriptthread;
     std::atomic<bool> cancelscript;
diff --git a/libtascar/src/osc_helper.cc b/libtascar/src/osc_helper.cc
index 7fe6316b..5bde252f 100644
--- a/libtascar/src/osc_helper.cc
+++ b/libtascar/src/osc_helper.cc
@@ -576,8 +576,7 @@ int string2proto(const std::string& proto)
 osc_server_t::osc_server_t(const std::string& multicast,
                            const std::string& port, const std::string& proto,
                            bool verbose_)
-    : osc_srv_addr(multicast), osc_srv_port(port), initialized(false),
-      isactive(false), verbose(verbose_)
+    : osc_srv_addr(multicast), osc_srv_port(port), verbose(verbose_)
 {
   runscriptthread = true;
   cancelscript = false;
@@ -625,6 +624,8 @@ osc_server_t::osc_server_t(const std::string& multicast,
 
 int osc_server_t::dispatch_data(void* data, size_t size)
 {
+  if(!isactive)
+    return 0;
   // std::lock_guard<std::mutex> lk{mtxdispatch};
   lo_server srv(lo_server_thread_get_server(lost));
   return lo_server_dispatch_data(srv, data, size);
@@ -890,8 +891,8 @@ void osc_server_t::activate()
 void osc_server_t::deactivate()
 {
   if(initialized) {
-    lo_server_thread_stop(lost);
     isactive = false;
+    lo_server_thread_stop(lost);
     if(verbose)
       std::cerr << "server inactive\n";
   }
diff --git a/libtascar/src/session_reader.cc b/libtascar/src/session_reader.cc
index 7d40b398..25d3e092 100644
--- a/libtascar/src/session_reader.cc
+++ b/libtascar/src/session_reader.cc
@@ -89,7 +89,10 @@ const std::string& showstring(const std::string& s)
 
 TASCAR::tsc_reader_t::~tsc_reader_t()
 {
-  chdir(orig_path.c_str());
+  auto result = chdir(orig_path.c_str());
+  if(result != 0)
+    TASCAR::add_warning("Unable to change to directory \"" + orig_path + "\"." +
+                        strerror(errno));
 }
 
 TASCAR::tsc_reader_t::tsc_reader_t(const std::string& filename_or_data,
diff --git a/plugins/src/tascarmod_oscserver.cc b/plugins/src/tascarmod_oscserver.cc
index 0ae51899..517d4b89 100644
--- a/plugins/src/tascarmod_oscserver.cc
+++ b/plugins/src/tascarmod_oscserver.cc
@@ -48,9 +48,10 @@ oscserver_t::oscserver_t(const TASCAR::module_cfg_t& cfg)
     : module_base_t(cfg), srv_addr(""), srv_port("9877"), srv_proto("TCP"),
       srv(NULL)
 {
-  GET_ATTRIBUTE_(srv_addr);
-  GET_ATTRIBUTE_(srv_port);
-  GET_ATTRIBUTE_(srv_proto);
+  GET_ATTRIBUTE(srv_addr, "",
+                "Server address (network device, multicast address)");
+  GET_ATTRIBUTE(srv_port, "", "Port number");
+  GET_ATTRIBUTE(srv_proto, "", "Server protocol (UDP or TCP)");
   srv = new TASCAR::osc_server_t(srv_addr, srv_port, srv_proto);
   srv->add_method("", NULL, osc_recv_, this);
   srv->activate();