Python: Add support for keysRead core callback

src/platform/python/core.c

@@ -13,6 +13,7 @@ struct mCoreCallbacks* mCorePythonCallbackCreate(void* pyobj) {
 	callbacks->videoFrameEnded = _mCorePythonCallbacksVideoFrameEnded;
 	callbacks->coreCrashed = _mCorePythonCallbacksCoreCrashed;
 	callbacks->sleep = _mCorePythonCallbacksSleep;
+	callbacks->keysRead = _mCorePythonCallbacksKeysRead;
 
 	callbacks->context = pyobj;
 	return callbacks;

src/platform/python/core.h

@@ -13,3 +13,4 @@ PYEXPORT void _mCorePythonCallbacksVideoFrameStarted(void* user);
 PYEXPORT void _mCorePythonCallbacksVideoFrameEnded(void* user);
 PYEXPORT void _mCorePythonCallbacksCoreCrashed(void* user);
 PYEXPORT void _mCorePythonCallbacksSleep(void* user);
+PYEXPORT void _mCorePythonCallbacksKeysRead(void* user);

src/platform/python/mgba/core.py

@@ -79,6 +79,12 @@ def _mCorePythonCallbacksSleep(user):  # pylint: disable=invalid-name
     context._sleep()
 
 
+@ffi.def_extern()
+def _mCorePythonCallbacksKeysRead(user):  # pylint: disable=invalid-name
+    context = ffi.from_handle(user)
+    context._keys_read()
+
+
 class CoreCallbacks(object):
     def __init__(self):
         self._handle = ffi.new_handle(self)
@@ -86,6 +92,7 @@ class CoreCallbacks(object):
         self.video_frame_ended = []
         self.core_crashed = []
         self.sleep = []
+        self.keys_read = []
         self.context = lib.mCorePythonCallbackCreate(self._handle)
 
     def _video_frame_started(self):
@@ -104,6 +111,10 @@ class CoreCallbacks(object):
         for callback in self.sleep:
             callback()
 
+    def _keys_read(self):
+        for callback in self.keys_read:
+            callback()
+
 
 class Core(object):
     if hasattr(lib, 'PLATFORM_GBA'):