add is_running support

Foundation/include/Poco/Process.h

@@ -217,6 +217,15 @@ public:
 		/// Waits for the process specified by handle to terminate
 		/// and returns the exit code of the process.
 		
+	static bool isRunning(const ProcessHandle& handle);
+		/// check if the process specified by handle is running or not
+		///
+		/// This is preferable on Windows where process IDs
+		/// may be reused.
+
+	static bool isRunning(PID pid);
+		/// Check if the process specified by given pid is running or not.
+		
 	static void kill(ProcessHandle& handle);
 		/// Kills the process specified by handle.
 		///

Foundation/include/Poco/Process_UNIX.h

@@ -66,6 +66,8 @@ public:
 		const EnvImpl& env);
 	static void killImpl(ProcessHandleImpl& handle);
 	static void killImpl(PIDImpl pid);
+	static bool isRunningImpl(const ProcessHandleImpl& handle);
+	static bool isRunningImpl(PIDImpl pid);
 	static void requestTerminationImpl(PIDImpl pid);
 
 private:

Foundation/include/Poco/Process_VMS.h

@@ -67,6 +67,8 @@ public:
 	static int waitImpl(PIDImpl pid);
 	static void killImpl(ProcessHandleImpl& handle);
 	static void killImpl(PIDImpl pid);
+	static bool isRunningImpl(const ProcessHandleImpl& handle);
+	static bool isRunningImpl(PIDImpl pid);
 	static void requestTerminationImpl(PIDImpl pid);
 };
 

Foundation/include/Poco/Process_VX.h

@@ -68,6 +68,8 @@ public:
 		const EnvImpl& env);
 	static void killImpl(ProcessHandleImpl& handle);
 	static void killImpl(PIDImpl pid);
+	static bool isRunningImpl(const ProcessHandleImpl& handle);
+	static bool isRunningImpl(PIDImpl pid);
 	static void requestTerminationImpl(PIDImpl pid);
 };
 

Foundation/include/Poco/Process_WIN32.h

@@ -72,6 +72,8 @@ public:
 		const EnvImpl& env);
 	static void killImpl(ProcessHandleImpl& handle);
 	static void killImpl(PIDImpl pid);
+	static bool isRunningImpl(const ProcessHandleImpl& handle);
+	static bool isRunningImpl(PIDImpl pid);
 	static void requestTerminationImpl(PIDImpl pid);
 	static std::string terminationEventName(PIDImpl pid);
 };

Foundation/include/Poco/Process_WIN32U.h

@@ -72,6 +72,8 @@ public:
 		const EnvImpl& env);
 	static void killImpl(ProcessHandleImpl& handle);
 	static void killImpl(PIDImpl pid);
+	static bool isRunningImpl(const ProcessHandleImpl& handle);
+	static bool isRunningImpl(PIDImpl pid);
 	static void requestTerminationImpl(PIDImpl pid);
 	static std::string terminationEventName(PIDImpl pid);
 };

Foundation/include/Poco/Process_WINCE.h

@@ -72,6 +72,8 @@ public:
 		const EnvImpl& env);
 	static void killImpl(ProcessHandleImpl& handle);
 	static void killImpl(PIDImpl pid);
+	static bool isRunningImpl(const ProcessHandleImpl& handle);
+	static bool isRunningImpl(PIDImpl pid);
 	static void requestTerminationImpl(PIDImpl pid);
 	static std::string terminationEventName(PIDImpl pid);
 };

Foundation/src/Process.cpp

@@ -191,6 +191,14 @@ void Process::kill(PID pid)
 	killImpl(pid);
 }
 
+bool Process::isRunning(const ProcessHandle& handle)
+{
+	return isRunningImpl(*handle._pImpl);
+}
+bool Process::isRunning(PID pid)
+{
+	return isRunningImpl(pid);
+}
 
 void Process::requestTermination(PID pid)
 {

Foundation/src/Process_UNIX.cpp

@@ -220,7 +220,23 @@ void ProcessImpl::killImpl(PIDImpl pid)
 	}
 }
 
+bool ProcessImpl::isRunningImpl(const ProcessHandleImpl& handle)
+{
+	return isRunningImpl(handle.id());
+}
+bool ProcessImpl::isRunningImpl(PIDImpl pid)  
+{
+	if (kill(pid, 0) == 0) 
+	{
+		return true;
+	} 
+	else 
+	{
+		return false;
+	}
+}
 
+				
 void ProcessImpl::requestTerminationImpl(PIDImpl pid)
 {
 	if (kill(pid, SIGINT) != 0)

Foundation/src/Process_VMS.cpp

@@ -139,6 +139,14 @@ void ProcessImpl::killImpl(PIDImpl pid)
 	}
 }
 
+bool ProcessImpl::isRunningImpl(const ProcessHandleImpl& handle) 
+{
+	throw Poco::NotImplementedException("Process::is_running()");
+}
+bool ProcessImpl::isRunningImpl(PIDImpl pid) 
+{
+	throw Poco::NotImplementedException("Process::is_running()");
+}
 
 void ProcessImpl::requestTerminationImpl(PIDImpl pid)
 {

Foundation/src/Process_VX.cpp

@@ -80,6 +80,15 @@ void ProcessImpl::killImpl(PIDImpl pid)
 	throw Poco::NotImplementedException("Process::kill()");
 }
 
+bool ProcessImpl::isRunningImpl(const ProcessHandleImpl& handle) 
+{
+	throw Poco::NotImplementedException("Process::is_running()");
+}
+bool ProcessImpl::isRunningImpl(PIDImpl pid) 
+{
+	throw Poco::NotImplementedException("Process::is_running()");
+}
+
 
 void ProcessImpl::requestTerminationImpl(PIDImpl pid)
 {

Foundation/src/Process_WIN32.cpp

@@ -255,6 +255,27 @@ void ProcessImpl::killImpl(PIDImpl pid)
 	}
 }
 
+bool ProcessImpl::isRunningImpl(const ProcessHandleImpl& handle) 
+{
+	BOOL fRC = true;
+	DWORD exit_code;
+
+	GetExitCodeProcess(handle.process(), &exit_code);
+	if (exit_code != STILL_ACTIVE) fRC = false;
+
+	return fRC;
+}
+bool ProcessImpl::isRunningImpl(PIDImpl pid) 
+{
+	HANDLE hProc = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
+	BOOL fRC = true;
+	DWORD exit_code;
+
+	GetExitCodeProcess(hProc, &exit_code);
+	if (exit_code != STILL_ACTIVE) fRC = false;
+
+	return fRC;
+}
 
 void ProcessImpl::requestTerminationImpl(PIDImpl pid)
 {

Foundation/src/Process_WIN32U.cpp

@@ -261,6 +261,27 @@ void ProcessImpl::killImpl(PIDImpl pid)
 	}
 }
 
+bool ProcessImpl::isRunningImpl(const ProcessHandleImpl& handle) 
+{
+	BOOL fRC = true;
+	DWORD exit_code;
+
+	GetExitCodeProcess(handle.process(), &exit_code);
+	if (exit_code != STILL_ACTIVE) fRC = false;
+
+	return fRC;
+}
+bool ProcessImpl::isRunningImpl(PIDImpl pid) 
+{
+	HANDLE hProc = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
+	BOOL fRC = true;
+	DWORD exit_code;
+
+	GetExitCodeProcess(hProc, &exit_code);
+	if (exit_code != STILL_ACTIVE) fRC = false;
+
+	return fRC;
+}
 
 void ProcessImpl::requestTerminationImpl(PIDImpl pid)
 {

Foundation/src/Process_WINCE.cpp

@@ -186,6 +186,28 @@ void ProcessImpl::killImpl(PIDImpl pid)
 	}
 }
 
+bool ProcessImpl::isRunningImpl(const ProcessHandleImpl& handle) 
+{
+	BOOL fRC = true;
+	DWORD exit_code;
+
+	GetExitCodeProcess(handle.process(), &exit_code);
+	if (exit_code != STILL_ACTIVE) fRC = false;
+
+	return fRC;
+}
+bool ProcessImpl::isRunningImpl(PIDImpl pid) 
+{
+	HANDLE hProc = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
+	BOOL fRC = true;
+	DWORD exit_code;
+
+	GetExitCodeProcess(hProc, &exit_code);
+	if (exit_code != STILL_ACTIVE) fRC = false;
+
+	return fRC;
+}
+
 
 void ProcessImpl::requestTerminationImpl(PIDImpl pid)
 {