Eric Pouech : user32/tests: Retry when opening the clipboard.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e439611d100603d02fdb586b8e6cbce9822e24e8
URL:    https://gitlab.winehq.org/wine/wine/-/commit/e439611d100603d02fdb586b8e6cbce...

Author: Eric Pouech 
Date:   Mon Jan  9 09:31:02 2023 +0100

user32/tests: Retry when opening the clipboard.

As the clipboard is a shared resource, we cannot expect that
no other app hasn't openeded it.
So wrap clipboard access with a retry feature in case of failure.

Signed-off-by: Eric Pouech

---

dlls/user32/tests/edit.c | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/dlls/user32/tests/edit.c b/dlls/user32/tests/edit.c
index 2afbbd5bea4..1918d1c10e9 100644
--- a/dlls/user32/tests/edit.c
+++ b/dlls/user32/tests/edit.c
@@ -32,6 +32,35 @@
 #define ID_EDITTEST2 99
 #define MAXLEN 200

+static BOOL open_clipboard(HWND hwnd)
+{
+    DWORD start = GetTickCount();
+    while (1)
+    {
+        BOOL ret = OpenClipboard(hwnd);
+        if (ret || GetLastError() != ERROR_ACCESS_DENIED)
+            return ret;
+        if (GetTickCount() - start > 100)
+        {
+            char classname[256];
+            DWORD le = GetLastError();
+            HWND clipwnd = GetOpenClipboardWindow();
+            /* Provide a hint as to the source of interference:
+             * - The class name would typically be CLIPBRDWNDCLASS if the
+             *   clipboard was opened by a Windows application using the
+             *   ole32 API.
+             * - And it would be __wine_clipboard_manager if it was opened in
+             *   response to a native application.
+             */
+            GetClassNameA(clipwnd, classname, ARRAY_SIZE(classname));
+            trace("%p (%s) opened the clipboard\n", clipwnd, classname);
+            SetLastError(le);
+            return ret;
+        }
+        Sleep(15);
+    }
+}
+
 struct edit_notify {
     int en_change, en_maxtext, en_update;
 };
@@ -2192,7 +2221,7 @@ static void test_espassword(void)
     ok(r == strlen(password), "Expected: %s, got len %ld\n", password, r);
     ok(strcmp(buffer, password) == 0, "expected %s, got %s\n", password, buffer);

-    r = OpenClipboard(hwEdit);
+    r = open_clipboard(hwEdit);
     ok(r == TRUE, "expected %d, got %ld le=%lu\n", TRUE, r, GetLastError());
     r = EmptyClipboard();
     ok(r == TRUE, "expected %d, got %ld\n", TRUE, r);
@@ -3195,7 +3224,7 @@ static void test_paste(void)
     strcpy(buffer, str);
     GlobalUnlock(hmem);

-    r = OpenClipboard(hEdit);
+    r = open_clipboard(hEdit);
     ok(r == TRUE, "expected %d, got %d le=%lu\n", TRUE, r, GetLastError());
     r = EmptyClipboard();
     ok(r == TRUE, "expected %d, got %d\n", TRUE, r);
@@ -3218,7 +3247,7 @@ static void test_paste(void)
     strcpy(buffer, str2);
     GlobalUnlock(hmem);

-    r = OpenClipboard(hEdit);
+    r = open_clipboard(hEdit);
     ok(r == TRUE, "expected %d, got %d le=%lu\n", TRUE, r, GetLastError());
     r = EmptyClipboard();
     ok(r == TRUE, "expected %d, got %d\n", TRUE, r);