Added sequence number to agent name in AgentReference::AgentReference()

This ensures the uniqueness of the agent name even if a process creates an agent several times in the same second.

objectstore/AgentReference.cpp

@@ -28,6 +28,8 @@
 
 namespace cta { namespace objectstore {
 
+std::atomic <uint64_t> AgentReference::g_nextAgentId(0);
+
 AgentReference::AgentReference(const std::string & clientType, log::Logger &logger):
 m_logger(logger) {
   m_nextId=0;
@@ -41,6 +43,7 @@ m_logger(logger) {
   cta::exception::Errnum::throwOnMinusOne(::gethostname(host, sizeof(host)),
     "In AgentId::AgentId:  failed to gethostname");
   // gettid is a safe system call (never fails)
+  uint64_t id=g_nextAgentId++;
   aid << clientType << "-" << host << "-" << syscall(SYS_gettid) << "-"
     << 1900 + localNow.tm_year
     << std::setfill('0') << std::setw(2) 
@@ -48,7 +51,8 @@ m_logger(logger) {
     << std::setw(2) << localNow.tm_mday << "-"
     << std::setw(2) << localNow.tm_hour << ":"
     << std::setw(2) << localNow.tm_min << ":"
-    << std::setw(2) << localNow.tm_sec;
+    << std::setw(2) << localNow.tm_sec << "-"
+    << id;
   m_agentAddress = aid.str();
   // Initialize the serialization token for queued actions (lock will make helgrind 
   // happy, but not really needed

objectstore/AgentReference.hpp

@@ -99,6 +99,7 @@ public:
    */
   std::string getAgentAddress();
 private:
+  static std::atomic<uint64_t> g_nextAgentId;
   std::atomic<uint64_t> m_nextId;
   std::string m_agentAddress;