Henri Verbeet : ddraw: Prevent ddraw from being unloaded.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: f95f4660602aad2e6564af3e3a933a68a36b4e82
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=f95f4660602aad2e6564af3e3a933a68a36b4e82

Author: Henri Verbeet <hverbeet at codeweavers.com>
Date:   Thu Jun 28 13:11:14 2012 +0200

ddraw: Prevent ddraw from being unloaded.

---

 dlls/ddraw/main.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/dlls/ddraw/main.c b/dlls/ddraw/main.c
index db79184..61e8ec9 100644
--- a/dlls/ddraw/main.c
+++ b/dlls/ddraw/main.c
@@ -812,6 +812,7 @@ DllMain(HINSTANCE hInstDLL,
     TRACE("(%p,%x,%p)\n", hInstDLL, Reason, lpv);
     if (Reason == DLL_PROCESS_ATTACH)
     {
+        static HMODULE ddraw_self;
         char buffer[MAX_PATH+10];
         DWORD size = sizeof(buffer);
         HKEY hkey = 0;
@@ -911,6 +912,16 @@ DllMain(HINSTANCE hInstDLL,
             RegCloseKey( hkey );
         }
 
+        /* Prevent the ddraw module from being unloaded. When switching to
+         * exclusive mode, we replace the window proc of the ddraw window. If
+         * an application would unload ddraw from the WM_DESTROY handler for
+         * that window, it would return to unmapped memory and die. Apparently
+         * this is supposed to work on Windows. We should probably use
+         * GET_MODULE_HANDLE_EX_FLAG_PIN for this, but that's not currently
+         * implemented. */
+        if (!GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, (const WCHAR *)&ddraw_self, &ddraw_self))
+            ERR("Failed to get own module handle.\n");
+
         instance = hInstDLL;
         DisableThreadLibraryCalls(hInstDLL);
     }