micropython: add micropython component

components/language/micropython/tests/thread/mutate_list.py

@@ -0,0 +1,45 @@
+# test concurrent mutating access to a shared list object
+#
+# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
+
+import _thread
+
+# the shared list
+li = list()
+
+# main thread function
+def th(n, lo, hi):
+    for repeat in range(n):
+        for i in range(lo, hi):
+            li.append(i)
+            assert li.count(i) == repeat + 1
+
+            li.extend([i, i])
+            assert li.count(i) == repeat + 3
+
+            li.remove(i)
+            assert li.count(i) == repeat + 2
+
+            li.remove(i)
+            assert li.count(i) == repeat + 1
+
+    with lock:
+        global n_finished
+        n_finished += 1
+
+
+lock = _thread.allocate_lock()
+n_thread = 4
+n_finished = 0
+
+# spawn threads
+for i in range(n_thread):
+    _thread.start_new_thread(th, (4, i * 60, (i + 1) * 60))
+
+# busy wait for threads to finish
+while n_finished < n_thread:
+    pass
+
+# check list has correct contents
+li.sort()
+print(li)