[PATCH 2/6] winecoreaudio: Introduce a notification thread.

[Andrew Eikum]

Signed-off-by: Andrew Eikum <aeikum at codeweavers.com>

On Tue, Nov 30, 2021 at 07:56:29AM +0000, Huw Davies wrote:
> Currently the thread just blocks until told to quit by midi_release.
> Eventually, this thread will dispatch the MIM_DATA and MIM_LONGDATA
> notifications and essentially replace the existing RunLoop-based
> mechanism.
> 
> Signed-off-by: Huw Davies <huw at codeweavers.com>
> ---
>  dlls/winecoreaudio.drv/coreaudio.c |  1 +
>  dlls/winecoreaudio.drv/coremidi.c  | 42 ++++++++++++++++++++++++++++++
>  dlls/winecoreaudio.drv/midi.c      | 16 ++++++++++++
>  dlls/winecoreaudio.drv/unixlib.h   |  7 +++++
>  4 files changed, 66 insertions(+)
> 
> diff --git a/dlls/winecoreaudio.drv/coreaudio.c b/dlls/winecoreaudio.drv/coreaudio.c
> index 420021a53ea..1efcfdba3f4 100644
> --- a/dlls/winecoreaudio.drv/coreaudio.c
> +++ b/dlls/winecoreaudio.drv/coreaudio.c
> @@ -1633,6 +1633,7 @@ unixlib_entry_t __wine_unix_call_funcs[] =
>      midi_release,
>      midi_out_message,
>      midi_in_message,
> +    midi_notify_wait,
>  
>      midi_in_lock, /* temporary */
>  };
> diff --git a/dlls/winecoreaudio.drv/coremidi.c b/dlls/winecoreaudio.drv/coremidi.c
> index 2e92d9ac2cb..bb8cb23f83b 100644
> --- a/dlls/winecoreaudio.drv/coremidi.c
> +++ b/dlls/winecoreaudio.drv/coremidi.c
> @@ -116,6 +116,13 @@ static CFStringRef midi_in_thread_port_name;
>  
>  static pthread_mutex_t midi_in_mutex = PTHREAD_MUTEX_INITIALIZER;
>  
> +#define NOTIFY_BUFFER_SIZE 64 + 1 /* + 1 for the sentinel */
> +static pthread_mutex_t notify_mutex = PTHREAD_MUTEX_INITIALIZER;
> +static pthread_cond_t notify_cond = PTHREAD_COND_INITIALIZER;
> +static BOOL notify_quit;
> +static struct notify_context notify_buffer[NOTIFY_BUFFER_SIZE];
> +static struct notify_context *notify_read, *notify_write;
> +
>  NTSTATUS midi_in_lock(void *args)
>  {
>      BOOL lock = !!args;
> @@ -139,6 +146,17 @@ static void set_in_notify(struct notify_context *notify, struct midi_src *src, W
>      notify->instance = src->midiDesc.dwInstance;
>  }
>  
> +static void notify_post(struct notify_context *notify)
> +{
> +    pthread_mutex_lock(&notify_mutex);
> +
> +    if (notify) FIXME("Not yet handled\n");
> +    else notify_quit = TRUE;
> +    pthread_cond_signal(&notify_cond);
> +
> +    pthread_mutex_unlock(&notify_mutex);
> +}
> +
>  /*
>   *  CoreMIDI IO threaded callback,
>   *  we can't call Wine debug channels, critical section or anything using NtCurrentTeb here.
> @@ -183,6 +201,11 @@ NTSTATUS midi_init(void *args)
>      OSStatus sc;
>      UINT i;
>  
> +    pthread_mutex_lock(&notify_mutex);
> +    notify_quit = FALSE;
> +    notify_read = notify_write = notify_buffer;
> +    pthread_mutex_unlock(&notify_mutex);
> +
>      sc = MIDIClientCreate(name, NULL /* FIXME use notify proc */, NULL, &midi_client);
>      CFRelease(name);
>      if (sc)
> @@ -300,6 +323,9 @@ NTSTATUS midi_release(void *args)
>          msg_port = CFMessagePortCreateRemote(kCFAllocatorDefault, midi_in_thread_port_name);
>          CFMessagePortSendRequest(msg_port, 1, NULL, 0.0, 0.0, NULL, NULL);
>          CFRelease(msg_port);
> +
> +        /* stop the notify_wait thread */
> +        notify_post(NULL);
>      }
>  
>      if (midi_client) MIDIClientDispose(midi_client); /* MIDIClientDispose will close all ports */
> @@ -1081,3 +1107,19 @@ NTSTATUS midi_in_message(void *args)
>  
>      return STATUS_SUCCESS;
>  }
> +
> +NTSTATUS midi_notify_wait(void *args)
> +{
> +    struct midi_notify_wait_params *params = args;
> +
> +    pthread_mutex_lock(&notify_mutex);
> +
> +    while (!notify_quit)
> +        pthread_cond_wait(&notify_cond, &notify_mutex);
> +
> +    *params->quit = notify_quit;
> +
> +    pthread_mutex_unlock(&notify_mutex);
> +
> +    return STATUS_SUCCESS;
> +}
> diff --git a/dlls/winecoreaudio.drv/midi.c b/dlls/winecoreaudio.drv/midi.c
> index b3adb09886d..e9cdb2a8ec4 100644
> --- a/dlls/winecoreaudio.drv/midi.c
> +++ b/dlls/winecoreaudio.drv/midi.c
> @@ -78,6 +78,21 @@ static void notify_client(struct notify_context *notify)
>                     notify->instance, notify->param_1, notify->param_2);
>  }
>  
> +static DWORD WINAPI notify_thread(void *p)
> +{
> +    struct midi_notify_wait_params params;
> +    BOOL quit;
> +
> +    params.quit = &quit;
> +
> +    while (1)
> +    {
> +        UNIX_CALL(midi_notify_wait, &params);
> +        if (quit) break;
> +    }
> +    return 0;
> +}
> +
>  static LONG CoreAudio_MIDIInit(void)
>  {
>      struct midi_init_params params;
> @@ -100,6 +115,7 @@ static LONG CoreAudio_MIDIInit(void)
>      {
>          MIDIInThreadPortName = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("MIDIInThreadPortName.%u"), getpid());
>          CloseHandle( CreateThread(NULL, 0, MIDIIn_MessageThread, NULL, 0, NULL));
> +        CloseHandle(CreateThread(NULL, 0, notify_thread, NULL, 0, NULL));
>      }
>      return err;
>  }
> diff --git a/dlls/winecoreaudio.drv/unixlib.h b/dlls/winecoreaudio.drv/unixlib.h
> index 2f0464ad322..67fcc35ce4c 100644
> --- a/dlls/winecoreaudio.drv/unixlib.h
> +++ b/dlls/winecoreaudio.drv/unixlib.h
> @@ -226,6 +226,11 @@ struct midi_in_message_params
>      struct notify_context *notify;
>  };
>  
> +struct midi_notify_wait_params
> +{
> +    BOOL *quit;
> +};
> +
>  enum unix_funcs
>  {
>      unix_get_endpoint_ids,
> @@ -252,6 +257,7 @@ enum unix_funcs
>      unix_midi_release,
>      unix_midi_out_message,
>      unix_midi_in_message,
> +    unix_midi_notify_wait,
>  
>      unix_midi_in_lock, /* temporary */
>  };
> @@ -260,6 +266,7 @@ NTSTATUS midi_init( void * ) DECLSPEC_HIDDEN;
>  NTSTATUS midi_release( void * ) DECLSPEC_HIDDEN;
>  NTSTATUS midi_out_message( void * ) DECLSPEC_HIDDEN;
>  NTSTATUS midi_in_message( void * ) DECLSPEC_HIDDEN;
> +NTSTATUS midi_notify_wait( void * ) DECLSPEC_HIDDEN;
>  NTSTATUS midi_in_lock( void * ) DECLSPEC_HIDDEN;
>  
>  extern unixlib_handle_t coreaudio_handle;
> -- 
> 2.23.0
> 
>