1 files changed, 32 insertions, 0 deletions
diff --git a/tests/thread/thread_shared2.py b/tests/thread/thread_shared2.py
new file mode 100644
index 0000000000..e4bfe78022
--- /dev/null
+++ b/tests/thread/thread_shared2.py
@@ -0,0 +1,32 @@
+# test capability for threads to access a shared mutable data structure
+# (without contention because they access different parts of the structure)
+#
+# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
+
+import _thread
+
+def foo(lst, i):
+    lst[i] += 1
+
+def thread_entry(n, lst, idx):
+    for i in range(n):
+        foo(lst, idx)
+    with lock:
+        global n_finished
+        n_finished += 1
+
+lock = _thread.allocate_lock()
+n_thread = 2
+n_finished = 0
+
+# the shared data structure
+lst = [0, 0]
+
+# spawn threads
+for i in range(n_thread):
+    _thread.start_new_thread(thread_entry, ((i + 1) * 10, lst, i))
+
+# busy wait for threads to finish
+while n_finished < n_thread:
+    pass
+print(lst)