code release

xlib/mp/MPSharedMemory.py

@@ -0,0 +1,28 @@
+import multiprocessing
+
+class MPSharedMemory:
+    def __init__(self, size):
+        self._size = size
+        self._ar = multiprocessing.RawArray('B', self._size)
+        self._mv = memoryview(self._ar).cast('B')
+
+    def get_ar(self) -> multiprocessing.RawArray:
+        """
+        returns multiprocessing.RawArray
+        """
+        return self._ar
+
+    def get_mv(self) -> memoryview:
+        """
+        returns byte-memoryview
+        """
+        return self._mv
+
+    def __getstate__(self):
+        d = self.__dict__.copy()
+        d.pop('_mv')
+        return d
+
+    def __setstate__(self, d):
+        self.__dict__.update(d)
+        self._mv = memoryview(self._ar).cast('B')