tests: Import Latch soak test

tests/soak/latch.py

+"""
+Used for stressing Latch.get/put. Swap the number of producer/consumer threads
+below to try both -- there are many conditions in the Latch code that require
+testing of both.
+"""
+
+import logging
+import random
+import threading
+import time
+import mitogen.core
+import mitogen.utils
+
+mitogen.utils.log_to_file()
+mitogen.core.IOLOG.setLevel(logging.DEBUG)
+mitogen.core._v = True
+mitogen.core._vv = True
+
+l = mitogen.core.Latch()
+consumed = 0
+produced = 0
+crash = 0
+
+def cons():
+    global consumed, crash
+    try:
+        while 1:
+            g = l.get()
+            print 'got=%s consumed=%s produced=%s crash=%s' % (g, consumed, produced, crash)
+            consumed += 1
+            time.sleep(g)
+            for x in xrange(int(g * 1000)):
+                pass
+    except:
+        crash += 1
+
+def prod():
+    global produced
+    while 1:
+        l.put(random.random()/10)
+        produced += 1
+        time.sleep(random.random()/10)
+
+allc = [threading.Thread(target=cons) for x in range(64)]
+allp = [threading.Thread(target=prod) for x in range(8)]
+for th in allc+allp:
+    th.setDaemon(True)
+    th.start()
+
+raw_input()
+exit()