Imported Upstream version 1.49.0upstream/1.49.0

1 files changed, 42 insertions, 0 deletions

diff --git a/libs/thread/test/test_4648.cpp b/libs/thread/test/test_4648.cpp
new file mode 100644
index 0000000000..b0f95f8d14
--- /dev/null
+++ b/libs/thread/test/test_4648.cpp
@@ -0,0 +1,42 @@
+#include <iostream>
+#include <boost/thread.hpp>
+#include <boost/current_function.hpp>
+
+class boostThreadLocksTest
+{
+public:
+  boost::shared_mutex myMutex;
+  //boost::upgrade_lock<boost::shared_mutex> myLock;
+  static int firstFunction(boostThreadLocksTest *pBoostThreadLocksTest);
+  static int secondFunction(boostThreadLocksTest *pBoostThreadLocksTest,
+      boost::upgrade_lock<boost::shared_mutex>& upgr);
+  boostThreadLocksTest()
+    :myMutex()
+     //, myLock(myMutex,boost::defer_lock_t())
+  {};
+};
+
+int boostThreadLocksTest::firstFunction(boostThreadLocksTest *pBoostThreadLocksTest)
+{
+  std::cout<<"Entering "<<boost::this_thread::get_id()<<" "<<"firstFunction"<<std::endl;
+  boost::upgrade_lock<boost::shared_mutex> myLock(pBoostThreadLocksTest->myMutex);
+  pBoostThreadLocksTest->secondFunction(pBoostThreadLocksTest, myLock);
+  std::cout<<"Returned From Call "<<boost::this_thread::get_id()<<" "<<"firstFunction"<<std::endl;
+  std::cout<<"Returning from "<<boost::this_thread::get_id()<<" "<<"firstFunction"<<std::endl;
+  return(0);
+}
+int boostThreadLocksTest::secondFunction(boostThreadLocksTest *pBoostThreadLocksTest, boost::upgrade_lock<boost::shared_mutex>& upgr) {
+  std::cout<<"Before Exclusive Locking "<<boost::this_thread::get_id()<<" "<<"secondFunction"<<std::endl;
+  boost::upgrade_to_unique_lock<boost::shared_mutex> localUniqueLock(upgr);
+  std::cout<<"After Exclusive Locking "<<boost::this_thread::get_id()<<" "<<"secondFunction"<<std::endl;
+  return(0);
+}
+int main() {
+    boostThreadLocksTest myObject;
+    boost::thread_group myThreadGroup;
+    myThreadGroup.create_thread(boost::bind(boostThreadLocksTest::firstFunction,&myObject));
+    myThreadGroup.create_thread(boost::bind(boostThreadLocksTest::firstFunction,&myObject));
+    myThreadGroup.create_thread(boost::bind(boostThreadLocksTest::firstFunction,&myObject));
+    myThreadGroup.join_all();
+    return 0;
+}