[PATCH 4/6] winealsa: Introduce a notification thread.

[Andrew Eikum]

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

On Wed, Mar 23, 2022 at 08:16:53AM +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.
> 
> Signed-off-by: Huw Davies <huw at codeweavers.com>
> ---
>  dlls/winealsa.drv/alsa.c     |  2 ++
>  dlls/winealsa.drv/alsamidi.c | 39 ++++++++++++++++++++++++++++++++++++
>  dlls/winealsa.drv/midi.c     | 24 +++++++++++++++++++---
>  dlls/winealsa.drv/unixlib.h  | 10 +++++++++
>  4 files changed, 72 insertions(+), 3 deletions(-)
> 
> diff --git a/dlls/winealsa.drv/alsa.c b/dlls/winealsa.drv/alsa.c
> index eb16203dbf9..5b592986c06 100644
> --- a/dlls/winealsa.drv/alsa.c
> +++ b/dlls/winealsa.drv/alsa.c
> @@ -2445,8 +2445,10 @@ unixlib_entry_t __wine_unix_call_funcs[] =
>      is_started,
>      get_prop_value,
>      midi_init,
> +    midi_release,
>      midi_out_message,
>      midi_in_message,
> +    midi_notify_wait,
>  
>      midi_seq_lock, /* temporary */
>      midi_in_lock,
> diff --git a/dlls/winealsa.drv/alsamidi.c b/dlls/winealsa.drv/alsamidi.c
> index ccdb35731d1..e10779f63a1 100644
> --- a/dlls/winealsa.drv/alsamidi.c
> +++ b/dlls/winealsa.drv/alsamidi.c
> @@ -69,6 +69,10 @@ static snd_seq_t *midi_seq;
>  static unsigned int seq_refs;
>  static int port_in = -1;
>  
> +static pthread_mutex_t notify_mutex = PTHREAD_MUTEX_INITIALIZER;
> +static pthread_cond_t notify_cond = PTHREAD_COND_INITIALIZER;
> +static BOOL notify_quit;
> +
>  static void seq_lock(void)
>  {
>      pthread_mutex_lock(&seq_mutex);
> @@ -119,6 +123,17 @@ 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);
> +}
> +
>  static snd_seq_t *seq_open(int *port_in_ret)
>  {
>      static int midi_warn;
> @@ -405,6 +420,14 @@ NTSTATUS midi_init(void *args)
>      return STATUS_SUCCESS;
>  }
>  
> +NTSTATUS midi_release(void *args)
> +{
> +    /* stop the notify_wait thread */
> +    notify_post(NULL);
> +
> +    return STATUS_SUCCESS;
> +}
> +
>  static void set_out_notify(struct notify_context *notify, struct midi_dest *dest, WORD dev_id, WORD msg,
>                             UINT_PTR param_1, UINT_PTR param_2)
>  {
> @@ -1101,3 +1124,19 @@ 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/winealsa.drv/midi.c b/dlls/winealsa.drv/midi.c
> index 35678588549..ca31def8d16 100644
> --- a/dlls/winealsa.drv/midi.c
> +++ b/dlls/winealsa.drv/midi.c
> @@ -557,18 +557,36 @@ DWORD WINAPI ALSA_modMessage(UINT wDevID, UINT wMsg, DWORD_PTR dwUser,
>      return err;
>  }
>  
> +static DWORD WINAPI notify_thread(void *p)
> +{
> +    struct midi_notify_wait_params params;
> +    struct notify_context notify;
> +    BOOL quit;
> +
> +    params.notify = ¬ify;
> +    params.quit = &quit;
> +
> +    while (1)
> +    {
> +        ALSA_CALL(midi_notify_wait, &params);
> +        if (quit) break;
> +    }
> +    return 0;
> +}
> +
>  /**************************************************************************
>   * 				DriverProc (WINEALSA.@)
>   */
>  LRESULT CALLBACK ALSA_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
>                                   LPARAM dwParam1, LPARAM dwParam2)
>  {
> -/* EPP     TRACE("(%08lX, %04X, %08lX, %08lX, %08lX)\n",  */
> -/* EPP 	  dwDevID, hDriv, wMsg, dwParam1, dwParam2); */
> -
>      switch(wMsg) {
>      case DRV_LOAD:
> +        CloseHandle(CreateThread(NULL, 0, notify_thread, NULL, 0, NULL));
> +        return 1;
>      case DRV_FREE:
> +        ALSA_CALL(midi_release, NULL);
> +        return 1;
>      case DRV_OPEN:
>      case DRV_CLOSE:
>      case DRV_ENABLE:
> diff --git a/dlls/winealsa.drv/unixlib.h b/dlls/winealsa.drv/unixlib.h
> index 6d5bcb64cf0..68ab650d2f6 100644
> --- a/dlls/winealsa.drv/unixlib.h
> +++ b/dlls/winealsa.drv/unixlib.h
> @@ -265,6 +265,12 @@ struct midi_in_message_params
>      struct notify_context *notify;
>  };
>  
> +struct midi_notify_wait_params
> +{
> +    BOOL *quit;
> +    struct notify_context *notify;
> +};
> +
>  struct midi_seq_open_params
>  {
>      int close;
> @@ -298,8 +304,10 @@ enum alsa_funcs
>      alsa_is_started,
>      alsa_get_prop_value,
>      alsa_midi_init,
> +    alsa_midi_release,
>      alsa_midi_out_message,
>      alsa_midi_in_message,
> +    alsa_midi_notify_wait,
>  
>      alsa_midi_seq_lock, /* temporary */
>      alsa_midi_in_lock,
> @@ -307,8 +315,10 @@ enum alsa_funcs
>  };
>  
>  NTSTATUS midi_init(void *args) DECLSPEC_HIDDEN;
> +NTSTATUS midi_release(void *args) DECLSPEC_HIDDEN;
>  NTSTATUS midi_out_message(void *args) DECLSPEC_HIDDEN;
>  NTSTATUS midi_in_message(void *args) DECLSPEC_HIDDEN;
> +NTSTATUS midi_notify_wait(void *args) DECLSPEC_HIDDEN;
>  
>  NTSTATUS midi_seq_lock(void *args) DECLSPEC_HIDDEN;
>  NTSTATUS midi_in_lock(void *args) DECLSPEC_HIDDEN;
> -- 
> 2.25.1
> 
>