Bitcoin-Qt: give testnet a unique IPC message queue name

- this prevents an interference with the IPC message queue (which is used
  for URI processing) when running a testnet and mainnet instance in
  parallel
- to check for testnet, I had to raise the ParseParameters() call in
  main() to the topmost position

src/qt/bitcoin.cpp

@@ -113,6 +113,14 @@ static void handleRunawayException(std::exception *e)
 #ifndef BITCOIN_QT_TEST
 int main(int argc, char *argv[])
 {
+    // Command-line options take precedence:
+    ParseParameters(argc, argv);
+
+    if(GetBoolArg("-testnet")) // Separate message queue name for testnet
+        strBitcoinURIQueueName = BITCOINURI_QUEUE_NAME_TESTNET;
+    else
+        strBitcoinURIQueueName = BITCOINURI_QUEUE_NAME_MAINNET;
+
     // Do this early as we don't want to bother initializing if we are just calling IPC
     ipcScanRelay(argc, argv);
 
@@ -126,9 +134,6 @@ int main(int argc, char *argv[])
     // Install global event filter that makes sure that long tooltips can be word-wrapped
     app.installEventFilter(new GUIUtil::ToolTipToRichTextFilter(TOOLTIP_WRAP_THRESHOLD, &app));
 
-    // Command-line options take precedence:
-    ParseParameters(argc, argv);
-
     // ... then bitcoin.conf:
     if (!boost::filesystem::is_directory(GetDataDir(false)))
     {

src/qt/qtipcserver.cpp

@@ -26,6 +26,9 @@ using namespace boost;
 using namespace boost::interprocess;
 using namespace boost::posix_time;
 
+// holds Bitcoin-Qt message queue name (initialized in bitcoin.cpp)
+std::string strBitcoinURIQueueName;
+
 #if defined MAC_OSX || defined __FreeBSD__
 // URI handling not implemented on OSX yet
 
@@ -46,7 +49,7 @@ static bool ipcScanCmd(int argc, char *argv[], bool fRelay)
         {
             const char *strURI = argv[i];
             try {
-                boost::interprocess::message_queue mq(boost::interprocess::open_only, BITCOINURI_QUEUE_NAME);
+                boost::interprocess::message_queue mq(boost::interprocess::open_only, strBitcoinURIQueueName.c_str());
                 if (mq.try_send(strURI, strlen(strURI), 0))
                     fSent = true;
                 else if (fRelay)
@@ -76,7 +79,7 @@ static void ipcThread(void* pArg)
 {
     // Make this thread recognisable as the GUI-IPC thread
     RenameThread("bitcoin-gui-ipc");
-	
+
     try
     {
         ipcThread2(pArg);
@@ -112,7 +115,7 @@ static void ipcThread2(void* pArg)
     }
 
     // Remove message queue
-    message_queue::remove(BITCOINURI_QUEUE_NAME);
+    message_queue::remove(strBitcoinURIQueueName.c_str());
     // Cleanup allocated memory
     delete mq;
 }
@@ -125,7 +128,7 @@ void ipcInit(int argc, char *argv[])
     unsigned int nPriority = 0;
 
     try {
-        mq = new message_queue(open_or_create, BITCOINURI_QUEUE_NAME, 2, MAX_URI_LENGTH);
+        mq = new message_queue(open_or_create, strBitcoinURIQueueName.c_str(), 2, MAX_URI_LENGTH);
 
         // Make sure we don't lose any bitcoin: URIs
         for (int i = 0; i < 2; i++)
@@ -140,10 +143,10 @@ void ipcInit(int argc, char *argv[])
         }
 
         // Make sure only one bitcoin instance is listening
-        message_queue::remove(BITCOINURI_QUEUE_NAME);
+        message_queue::remove(strBitcoinURIQueueName.c_str());
         delete mq;
 
-        mq = new message_queue(open_or_create, BITCOINURI_QUEUE_NAME, 2, MAX_URI_LENGTH);
+        mq = new message_queue(open_or_create, strBitcoinURIQueueName.c_str(), 2, MAX_URI_LENGTH);
     }
     catch (interprocess_exception &ex) {
         printf("ipcInit() - boost interprocess exception #%d: %s\n", ex.get_error_code(), ex.what());

src/qt/qtipcserver.h

@@ -1,8 +1,14 @@
 #ifndef QTIPCSERVER_H
 #define QTIPCSERVER_H
 
-// Define Bitcoin-Qt message queue name
+#include <string>
-#define BITCOINURI_QUEUE_NAME "BitcoinURI"
+
+// Define Bitcoin-Qt message queue name for mainnet
+#define BITCOINURI_QUEUE_NAME_MAINNET "BitcoinURI"
+// Define Bitcoin-Qt message queue name for testnet
+#define BITCOINURI_QUEUE_NAME_TESTNET "BitcoinURI-testnet"
+
+extern std::string strBitcoinURIQueueName;
 
 void ipcScanRelay(int argc, char *argv[]);
 void ipcInit(int argc, char *argv[]);