[PATCH 4/6] winmm: Synchronize player status and API calls.

[Andrew Eikum]

On Mon, May 21, 2018 at 09:36:13PM +0900, Akihiro Sagawa wrote:
> +static MMRESULT midistream_post_message_and_wait(WINE_MIDIStream* lpMidiStrm, UINT msg, WPARAM wParam, LPARAM lParam)
> +{
> +    ResetEvent(lpMidiStrm->hEvent);
> +    if (!PostThreadMessageA(lpMidiStrm->dwThreadID, msg, wParam, lParam)) {
> +        WARN("bad PostThreadMessageA\n");
> +        return MMSYSERR_ERROR;
> +    } else if (GetCurrentThreadId() != lpMidiStrm->dwThreadID) {
> +        if (WaitForSingleObject(lpMidiStrm->hEvent, INFINITE) != WAIT_OBJECT_0) {

Sorry for the delay in reviewing these.

This seems thread-unsafe to me. Since these are private Wine messages,
could we define wParam to be a unique event to signal instead of
storing it in the stream object?

The rest of the patch sequence looks OK to me.

Thanks for working on this,
Andrew