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authorPau Espin Pedrol <pespin@sysmocom.de>2017-05-22 16:38:49 +0200
committerPau Espin Pedrol <pespin@sysmocom.de>2017-05-25 17:25:09 +0000
commit927344b4dc1223e0f455971ef9293c90fb7d3a80 (patch)
tree8226610ffd05b2e6b920bcbc96ea5e656abafb62 /src/osmo_gsm_tester/event_loop.py
parent095d1290a6fc933b26a536f9dcc694ac7989bb3f (diff)
event_loop: Create a global event loop to poll and wait for events
Tweaked-by: nhofmeyr Change-Id: Iaa78bae0f053496377609b24a11ebaef3fd77598
Diffstat (limited to 'src/osmo_gsm_tester/event_loop.py')
-rw-r--r--src/osmo_gsm_tester/event_loop.py64
1 files changed, 64 insertions, 0 deletions
diff --git a/src/osmo_gsm_tester/event_loop.py b/src/osmo_gsm_tester/event_loop.py
new file mode 100644
index 0000000..d082898
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+++ b/src/osmo_gsm_tester/event_loop.py
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+# osmo_gsm_tester: Event loop
+#
+# Copyright (C) 2016-2017 by sysmocom - s.f.m.c. GmbH
+#
+# Author: Pau Espin Pedrol <pespin@sysmocom.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# These will be initialized before each test run.
+# A test script can thus establish its context by doing:
+# from osmo_gsm_tester.test import *
+import time
+poll_funcs = []
+
+def register_poll_func(func):
+ global poll_funcs
+ poll_funcs.append(func)
+
+def unregister_poll_func(func):
+ global poll_funcs
+ poll_funcs.remove(func)
+
+def poll():
+ global poll_funcs
+ for func in poll_funcs:
+ func()
+
+def wait_no_raise(log_obj, condition, condition_args, condition_kwargs, timeout, timestep):
+ if not timeout or timeout < 0:
+ log_obj.raise_exn('wait() *must* time out at some point. timeout=%r' % timeout)
+ if timestep < 0.1:
+ timestep = 0.1
+
+ started = time.time()
+ while True:
+ poll()
+ if condition(*condition_args, **condition_kwargs):
+ return True
+ waited = time.time() - started
+ if waited > timeout:
+ return False
+ time.sleep(timestep)
+
+def wait(log_obj, condition, *condition_args, timeout=300, timestep=1, **condition_kwargs):
+ if not wait_no_raise(log_obj, condition, condition_args, condition_kwargs, timeout, timestep):
+ log_obj.raise_exn('Wait timeout')
+
+def sleep(log_obj, seconds):
+ assert seconds > 0.
+ wait_no_raise(log_obj, lambda: False, [], {}, timeout=seconds, timestep=min(seconds, 1))
+
+
+# vim: expandtab tabstop=4 shiftwidth=4