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dinput: Fix a possible deadlock at exit.

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This fix another deadlock issue with dinput.

The old implementation of dinput waits for a hook thread to exit
during its uninitialization, which will never return during DLL_THREAD_DETACH.

Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zhiyi Zhang 2019-04-11 18:28:40 +08:00 committed by Alexandre Julliard
parent 9b7b9fa0f5
commit 886d28de97
1 changed files with 4 additions and 8 deletions
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12
dlls/dinput/dinput_main.c
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@ -1781,7 +1781,7 @@ static DWORD WINAPI hook_thread_proc(void *param)
DispatchMessageW(&msg);
}
return 0;
FreeLibraryAndExitThread(DINPUT_instance, 0);
}
static DWORD hook_thread_id;
@ -1798,15 +1798,16 @@ static CRITICAL_SECTION dinput_hook_crit = { &dinput_critsect_debug, -1, 0, 0, 0
static BOOL check_hook_thread(void)
{
static HANDLE hook_thread;
HMODULE module;
EnterCriticalSection(&dinput_hook_crit);
TRACE("IDirectInputs left: %d\n", list_count(&direct_input_list));
if (!list_empty(&direct_input_list) && !hook_thread)
{
GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, (const WCHAR*)DINPUT_instance, &module);
hook_thread_event = CreateEventW(NULL, FALSE, FALSE, NULL);
hook_thread = CreateThread(NULL, 0, hook_thread_proc, hook_thread_event, 0, &hook_thread_id);
LeaveCriticalSection(&dinput_hook_crit);
}
else if (list_empty(&direct_input_list) && hook_thread)
{
@ -1821,16 +1822,11 @@ static BOOL check_hook_thread(void)
hook_thread_id = 0;
PostThreadMessageW(tid, WM_USER+0x10, 0, 0);
LeaveCriticalSection(&dinput_hook_crit);
/* wait for hook thread to exit */
WaitForSingleObject(hook_thread, INFINITE);
CloseHandle(hook_thread);
hook_thread = NULL;
}
else
LeaveCriticalSection(&dinput_hook_crit);
LeaveCriticalSection(&dinput_hook_crit);
return hook_thread_id != 0;
}