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import pytest
_posixshmem = pytest.importorskip('_posixshmem')
import os
import mmap
def test_simple():
mode = 0o600
tmp_path = "/psm_%s" % (hex(id(hex)), ) # hack to get a uniquish path
flags = os.O_RDWR | os.O_CREAT | os.O_EXCL
fd = _posixshmem.shm_open(tmp_path, flags, mode)
try:
size = 1024
os.ftruncate(fd, size)
mem1 = mmap.mmap(fd, size)
fd2 = _posixshmem.shm_open(tmp_path, flags & ~os.O_CREAT, mode)
mem2 = mmap.mmap(fd2, size)
mem1[0] = 14
assert mem1[0] == 14
finally:
_posixshmem.shm_unlink(tmp_path)
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