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

[Huw Davies]

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