Added ProcessMonitor class, which is used to monitor a number of sponsor processes, to control Zen instance lifetime

1 files changed, 26 insertions, 1 deletions

diff --git a/zencore/include/zencore/thread.h b/zencore/include/zencore/thread.h
index b18da6031..0e34d6518 100644
--- a/zencore/include/zencore/thread.h
+++ b/zencore/include/zencore/thread.h
@@ -8,6 +8,8 @@
 #	include <shared_mutex>
 #endif
 
+#include <vector>
+
 namespace zen {
 
 /**
@@ -93,6 +95,7 @@ public:
 	ZENCORE_API void Set();
 	ZENCORE_API void Reset();
 	ZENCORE_API bool Wait(int TimeoutMs = -1);
+	ZENCORE_API void Close();
 
 protected:
 	explicit Event(void* EventHandle) : m_EventHandle(EventHandle) {}
@@ -125,7 +128,7 @@ private:
 };
 
 /** Basic process abstraction
- */
+  */
 class ProcessHandle
 {
 public:
@@ -150,6 +153,28 @@ private:
 	int	  m_Pid			  = 0;
 };
 
+/** Process monitor - monitors a list of running processes via polling
+
+    Intended to be used to monitor a set of "sponsor" processes, where
+	we need to determine when none of them remain alive
+
+ */
+
+class ProcessMonitor
+{
+public:
+	ProcessMonitor();
+	~ProcessMonitor();
+
+	ZENCORE_API bool IsRunning();
+	ZENCORE_API void AddPid(int Pid);
+	ZENCORE_API bool IsActive() const;
+
+private:
+	mutable RwLock	   m_Lock;
+	std::vector<void*> m_ProcessHandles;
+};
+
 ZENCORE_API bool IsProcessRunning(int pid);
 ZENCORE_API int	 GetCurrentProcessId();