tests: Add 3 more tests for _thread module.

tests/thread/thread_lock4.py

@@ -0,0 +1,46 @@
+# test using lock to coordinate access to global mutable objects
+#
+# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
+
+import _thread
+
+def fac(n):
+    x = 1
+    for i in range(1, n + 1):
+        x *= i
+    return x
+
+def thread_entry():
+    while True:
+        with jobs_lock:
+            try:
+                f, arg = jobs.pop(0)
+            except IndexError:
+                return
+        ans = f(arg)
+        with output_lock:
+            output.append((arg, ans))
+
+# create a list of jobs
+jobs = [(fac, i) for i in range(20, 80)]
+jobs_lock = _thread.allocate_lock()
+n_jobs = len(jobs)
+
+# create a list to store the results
+output = []
+output_lock = _thread.allocate_lock()
+
+# spawn threads to do the jobs
+for i in range(4):
+    _thread.start_new_thread(thread_entry, ())
+
+# wait for the jobs to complete
+while True:
+    with jobs_lock:
+        if len(output) == n_jobs:
+            break
+
+# sort and print the results
+output.sort(key=lambda x: x[0])
+for arg, ans in output:
+    print(arg, ans)

tests/thread/thread_stacksize1.py

@@ -0,0 +1,36 @@
+# test setting the thread stack size
+#
+# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
+
+import sys
+try:
+    import utime as time
+except ImportError:
+    import time
+import _thread
+
+# different implementations have different minimum sizes
+if sys.implementation == 'micropython':
+    sz = 2 * 1024
+else:
+    sz = 32 * 1024
+
+def foo():
+    pass
+
+def thread_entry():
+    foo()
+
+# test set/get of stack size
+print(_thread.stack_size())
+print(_thread.stack_size(sz))
+print(_thread.stack_size() == sz)
+print(_thread.stack_size())
+
+# set stack size and spawn a few threads
+_thread.stack_size(sz)
+for i in range(2):
+    _thread.start_new_thread(thread_entry, ())
+
+time.sleep(0.2)
+print('done')

tests/thread/thread_stress_recurse.py

@@ -0,0 +1,23 @@
+# test hitting the function recursion limit within a thread
+#
+# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
+
+try:
+    import utime as time
+except ImportError:
+    import time
+import _thread
+
+def foo():
+    foo()
+
+def thread_entry():
+    try:
+        foo()
+    except RuntimeError:
+        print('RuntimeError')
+
+_thread.start_new_thread(thread_entry, ())
+
+time.sleep(0.2)
+print('done')