diff options
| -rw-r--r-- | Lib/test/test_multiprocessing.py | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py index 45bf454..de894f3 100644 --- a/Lib/test/test_multiprocessing.py +++ b/Lib/test/test_multiprocessing.py @@ -98,6 +98,22 @@ except ImportError: Structure = object c_int = c_double = None + +def check_enough_semaphores(): + """Check that the system supports enough semaphores to run the test.""" + # minimum number of semaphores available according to POSIX + nsems_min = 256 + try: + nsems = os.sysconf("SC_SEM_NSEMS_MAX") + except (AttributeError, ValueError): + # sysconf not available or setting not available + return + if nsems == -1 or nsems >= nsems_min: + return + raise unittest.SkipTest("The OS doesn't support enough semaphores " + "to run the test (required: %d)." % nsems_min) + + # # Creates a wrapper for a function which records the time it takes to finish # @@ -2294,6 +2310,8 @@ def test_main(run=None): except OSError: raise unittest.SkipTest("OSError raises on RLock creation, see issue 3111!") + check_enough_semaphores() + if run is None: from test.support import run_unittest as run |