win32: Task #2933 Prevent multiple integ tests from running in parallel (had to expose some arch misc windows functions)

src/lib/arch/CArchMiscWindows.h

@@ -179,6 +179,11 @@ public:
 
 	static void setInstanceWin32(HINSTANCE instance);
 	
+	static BOOL WINAPI getProcessEntry(PROCESSENTRY32& entry, DWORD processID);
+	static BOOL WINAPI getProcessEntry(PROCESSENTRY32& entry, std::string processName);
+	static BOOL WINAPI getSelfProcessEntry(PROCESSENTRY32& entry);
+	static BOOL WINAPI getParentProcessEntry(PROCESSENTRY32& entry);
+
 private:
 	//! Open and return a registry key, closing the parent key
 	static HKEY			openKey(HKEY parent, const TCHAR* child, bool create);
@@ -195,10 +200,6 @@ private:
 
 	static DWORD WINAPI	dummySetThreadExecutionState(DWORD);
 
-	static BOOL WINAPI getProcessEntry(PROCESSENTRY32& entry, DWORD processID);
-	static BOOL WINAPI getSelfProcessEntry(PROCESSENTRY32& entry);
-	static BOOL WINAPI getParentProcessEntry(PROCESSENTRY32& entry);
-
 private:
 	typedef std::set<HWND> CDialogs;
 	typedef DWORD (WINAPI *STES_t)(DWORD);

src/test/integtests/Main.cpp

@@ -23,10 +23,20 @@
 #include "CArchMiscWindows.h"
 #endif
 
+#define ERROR_ALREADY_RUNNING 1
+
+using namespace std;
+
+void
+ensureSingleInstance();
+
 int
 main(int argc, char **argv)
 {
-	std::cout << "Synergy integration tests\n";
+	// make sure integ tests don't run in parallel.
+	int err = ensureSingleInstance();
+	if (err != 0)
+		return err;
 
 #if SYSAPI_WIN32
 	// record window instance for tray icon, etc
@@ -39,3 +49,50 @@ main(int argc, char **argv)
 
 	return RUN_ALL_TESTS();
 }
+
+int
+ensureSingleInstance()
+{
+#if SYSAPI_WIN32
+
+	// get info for current process (we'll use the name later).
+	PROCESSENTRY32 selfEntry;
+	if (!CArchMiscWindows::getSelfProcessEntry(selfEntry))
+		cerr << "could not process info for self "
+		<< "(error: " << GetLastError() << ")" << endl;
+
+	// get current task list.
+	HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
+	if (snapshot == INVALID_HANDLE_VALUE)
+		cerr << "could not get process snapshot "
+			<< "(error: " << GetLastError() << ")" << endl;
+
+	PROCESSENTRY32 entry;
+	BOOL gotEntry = Process32First(snapshot, &entry);
+	if (!gotEntry)
+		cerr << "could not get first process entry "
+		<< "(error: " << GetLastError() << ")" << endl;
+
+	while (gotEntry)
+	{
+		string checkName(entry.szExeFile);
+
+		// if entry has the same name as this process, but is not
+		// the current process...
+		if ((checkName.find(selfEntry.szExeFile) != string::npos) &&
+			(entry.th32ProcessID != selfEntry.th32ProcessID))
+		{
+			cerr << "error: process already running: " 
+				<< entry.th32ProcessID << " -> " << entry.szExeFile << endl;
+
+			return ERROR_ALREADY_RUNNING;
+		}
+
+		gotEntry = Process32Next(snapshot, &entry);
+	}
+#elif SYSAPI_UNIX
+	// TODO
+#endif
+
+	return 0;
+}