1 files changed, 67 insertions, 0 deletions
diff --git a/src/common/windows/com.c b/src/common/windows/com.c
new file mode 100644
index 0000000..a400ca9
--- /dev/null
+++ b/src/common/windows/com.c
@@ -0,0 +1,67 @@
+#include "com.h"
+
+#include <stdlib.h>
+
+#if FF_HAVE_WINRT
+    #include <roapi.h>
+
+static void RoUninitializeWrap(void) {
+    RoUninitialize();
+}
+
+static const char* doInitCom() {
+    HRESULT res = RoInitialize(RO_INIT_MULTITHREADED);
+    if (FAILED(res)) {
+        switch (res) {
+            case E_INVALIDARG:
+                return "RoInitialize() failed: invalid argument";
+            case E_OUTOFMEMORY:
+                return "RoInitialize() failed: out of memory";
+            case E_UNEXPECTED:
+                return "RoInitialize() failed: unexpected error";
+            case RPC_E_CHANGED_MODE:
+                // COM was already initialized with a different concurrency model
+                return NULL;
+            default:
+                return "RoInitialize() failed: unknown error";
+        }
+    }
+
+    atexit(RoUninitializeWrap);
+    return NULL;
+}
+#else
+    #include <combaseapi.h>
+
+static void CoUninitializeWrap(void) {
+    CoUninitialize();
+}
+
+static const char* doInitCom() {
+    HRESULT res = CoInitializeEx(NULL, COINIT_MULTITHREADED);
+    if (FAILED(res)) {
+        switch (res) {
+            case E_INVALIDARG:
+                return "CoInitializeEx() failed: invalid argument";
+            case E_OUTOFMEMORY:
+                return "CoInitializeEx() failed: out of memory";
+            case RPC_E_CHANGED_MODE:
+                // COM was already initialized with a different concurrency model
+                return NULL;
+            default:
+                return "CoInitializeEx() failed: unknown error";
+        }
+    }
+
+    atexit(CoUninitializeWrap);
+    return NULL;
+}
+#endif
+
+const char* ffInitCom(void) {
+    static const char* error = "";
+    if (error && error[0] == '\0') {
+        error = doInitCom();
+    }
+    return error;
+}