[PATCH v3 2/7] win32u: Check for pending hardware messages after processing events.

[Rémi Bernon]

From: Rémi Bernon

Instead of relying on ProcessEvents return value.
---
 dlls/win32u/message.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/dlls/win32u/message.c b/dlls/win32u/message.c
index dc316922581..3cd01af3aa7 100644
--- a/dlls/win32u/message.c
+++ b/dlls/win32u/message.c
@@ -42,6 +42,10 @@ WINE_DEFAULT_DEBUG_CHANNEL(msg);
 WINE_DECLARE_DEBUG_CHANNEL(key);
 WINE_DECLARE_DEBUG_CHANNEL(relay);

+#define QS_DRIVER       0x80000000
+#define QS_HARDWARE     0x40000000
+#define QS_INTERNAL     (QS_DRIVER | QS_HARDWARE)
+
 static const struct _KUSER_SHARED_DATA *user_shared_data = (struct _KUSER_SHARED_DATA *)0x7ffe0000;

static LONG atomic_load_long( const volatile LONG *ptr )
@@ -3164,9 +3168,24 @@ static HANDLE get_server_queue_handle(void)
     return ret;
 }

+static BOOL has_hardware_messages(void)
+{
+    struct object_lock lock = OBJECT_LOCK_INIT;
+    const queue_shm_t *queue_shm;
+    BOOL signaled = FALSE;
+    UINT status;
+
+    while ((status = get_shared_queue( &lock, &queue_shm )) == STATUS_PENDING)
+        signaled = queue_shm->internal_bits & QS_HARDWARE;
+    if (status) return FALSE;
+
+    return signaled;
+}
+
 BOOL process_driver_events( UINT mask )
 {
-    return user_driver->pProcessEvents( mask );
+    user_driver->pProcessEvents( mask );
+    return has_hardware_messages();
 }

void check_for_events( UINT flags )