Prevent multiple instances, closes issue 14

nlp80 · Oct 20, 2018 · fb532f6 · fb532f6
1 parent ac7966a
commit fb532f6
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/irFFB/irFFB.cpp b/irFFB/irFFB.cpp
@@ -38,6 +38,8 @@ WCHAR szTitle[MAX_LOADSTRING];
 WCHAR szWindowClass[MAX_LOADSTRING];
 NOTIFYICONDATA niData;
 
+HANDLE globalMutex;
+
 HANDLE debugHnd = INVALID_HANDLE_VALUE;
 wchar_t debugLastMsg[512];
 LONG debugRepeat = 0;
@@ -583,6 +585,11 @@ int APIENTRY wWinMain(
 
     }
 
+    globalMutex = CreateMutex(NULL, false, L"Global\\irFFB_Mutex");
+
+    if (GetLastError() == ERROR_ALREADY_EXISTS)
+        exit(0);
+
     INITCOMMONCONTROLSEX ccEx;
 
     HANDLE handles[1];
@@ -1644,6 +1651,7 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
             hidGuardian->stop(GetCurrentProcessId());
             if (debugHnd != INVALID_HANDLE_VALUE)
                 CloseHandle(debugHnd);
+            CloseHandle(globalMutex);
             exit(0);
         }
         break;