def test_IPC_CREAT_new(self):
"""tests sysv_ipc.IPC_CREAT to create a new SharedMemory without IPC_EXCL"""
# I can't pass None for the name unless I also pass IPC_EXCL.
key = tests_base.make_key()
# Note: this method of finding an unused key is vulnerable to a race
# condition. It's good enough for test, but don't copy it for use in
# production code!
key_is_available = False
while not key_is_available:
try:
mem = sysv_ipc.SharedMemory(key)
mem.detach()
mem.remove()
except sysv_ipc.ExistentialError:
key_is_available = True
else:
key = tests_base.make_key()
mem = sysv_ipc.SharedMemory(key,
sysv_ipc.IPC_CREAT,
size=sysv_ipc.PAGE_SIZE)
self.assertIsNotNone(mem)
mem.detach()
mem.remove()
def test_IPC_CREAT_new(self):
"""tests sysv_ipc.IPC_CREAT to create a new semaphore without IPC_EXCL"""
# I can't pass None for the name unless I also pass IPC_EXCL.
key = tests_base.make_key()
# Note: this method of finding an unused key is vulnerable to a race
# condition. It's good enough for test, but don't copy it for use in
# production code!
key_is_available = False
while not key_is_available:
try:
sem = sysv_ipc.Semaphore(key)
sem.close()
except sysv_ipc.ExistentialError:
key_is_available = True
else:
key = tests_base.make_key()
sem = sysv_ipc.Semaphore(key, sysv_ipc.IPC_CREAT)
self.assertIsNotNone(sem)
sem.remove()