[PATCH v2] winmm: Instanciate DirectInput8 class using CoCreateInstance.

[Rémi Bernon]

Instead of linking with dinput8.dll and creating the class at load time,
which causes some native hooks to fail loading.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52222
Signed-off-by: Rémi Bernon <rbernon at codeweavers.com>
---

v2: Reset dinput to NULL in case of creation failure, so that we don't
    release it or call CoUninitialize twice.

 dlls/winmm/Makefile.in |  2 +-
 dlls/winmm/joystick.c  | 30 ++++++++++++++++++++++++++----
 dlls/winmm/winemm.h    |  1 -
 dlls/winmm/winmm.c     |  2 --
 4 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/dlls/winmm/Makefile.in b/dlls/winmm/Makefile.in
index 5439ae21678..3036526c14e 100644
--- a/dlls/winmm/Makefile.in
+++ b/dlls/winmm/Makefile.in
@@ -1,7 +1,7 @@
 EXTRADEFS = -D_WINMM_
 MODULE    = winmm.dll
 IMPORTLIB = winmm
-IMPORTS   = uuid user32 advapi32 ole32 msacm32 dinput8
+IMPORTS   = uuid user32 advapi32 ole32 msacm32
 
 C_SRCS = \
 	driver.c \
diff --git a/dlls/winmm/joystick.c b/dlls/winmm/joystick.c
index 5f5683e3e35..d055b3c9deb 100644
--- a/dlls/winmm/joystick.c
+++ b/dlls/winmm/joystick.c
@@ -152,11 +152,28 @@ static BOOL CALLBACK enum_instances( const DIDEVICEINSTANCEW *instance, void *co
     return DIENUM_CONTINUE;
 }
 
-void joystick_load( HINSTANCE instance )
+static BOOL WINAPI joystick_load( INIT_ONCE *once, void *param, void **context )
 {
-    HRESULT hr = DirectInput8Create( instance, DIRECTINPUT_VERSION, &IID_IDirectInput8W,
-                                     (void **)&dinput, NULL );
-    if (FAILED(hr)) WARN( "could not create dinput instance, hr %#x\n", hr );
+    HRESULT hr;
+
+    CoInitialize( NULL );
+
+    hr = CoCreateInstance( &CLSID_DirectInput8, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectInput8W,
+                           (void **)&dinput );
+    if (FAILED(hr)) goto failed;
+
+    hr = IDirectInput8_Initialize( dinput, hWinMM32Instance, DIRECTINPUT_VERSION );
+    if (FAILED(hr)) goto failed;
+
+    return TRUE;
+
+failed:
+    if (dinput) IDirectInput8_Release( dinput );
+    dinput = NULL;
+
+    WARN( "Could not create dinput instance, hr %#x\n", hr );
+    CoUninitialize();
+    return FALSE;
 }
 
 void joystick_unload()
@@ -173,15 +190,20 @@ void joystick_unload()
     }
 
     IDirectInput8_Release( dinput );
+    CoUninitialize();
 }
 
 static void find_joysticks(void)
 {
+    static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
+
     IDirectInputDevice8W *device;
     HANDLE event;
     DWORD index;
     HRESULT hr;
 
+    InitOnceExecuteOnce( &init_once, joystick_load, NULL, NULL );
+
     if (!dinput) return;
 
     index = 0;
diff --git a/dlls/winmm/winemm.h b/dlls/winmm/winemm.h
index 3459c2a85ef..52cab64b1c5 100644
--- a/dlls/winmm/winemm.h
+++ b/dlls/winmm/winemm.h
@@ -153,7 +153,6 @@ MMRESULT WINMM_CheckCallback(DWORD_PTR dwCallback, DWORD fdwOpen, BOOL mixer) DE
 
 void WINMM_DeleteWaveform(void) DECLSPEC_HIDDEN;
 
-void joystick_load( HMODULE instance ) DECLSPEC_HIDDEN;
 void joystick_unload( void ) DECLSPEC_HIDDEN;
 
 /* Global variables */
diff --git a/dlls/winmm/winmm.c b/dlls/winmm/winmm.c
index aab8bfb51a9..aa2dd50c4c1 100644
--- a/dlls/winmm/winmm.c
+++ b/dlls/winmm/winmm.c
@@ -144,8 +144,6 @@ BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID fImpLoad)
 
         if (!WINMM_CreateIData(hInstDLL))
             return FALSE;
-
-        joystick_load( hInstDLL );
         break;
     case DLL_PROCESS_DETACH:
         if(fImpLoad)
-- 
2.34.0