[PATCH 2/6] winecoreaudio: 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 and essentially replace the existing RunLoop-based
mechanism.

Signed-off-by: Huw Davies 
---
 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;