def test_read_w_priority(self):
with open('/etc/passwd') as fp:
ctx = aio_context_t()
io_setup(c_uint(1), pointer(ctx))
self.assertNotEqual(0, ctx.value)
len_buf = 64
buf = bytearray(len_buf)
arr_t = c_char * len_buf
arr_p = cast(arr_t.from_buffer(buf), c_void_p)
iocb = IOCB(aio_lio_opcode=IOCBCMD.PREAD, aio_fildes=fp.fileno(),
aio_buf=arr_p.value, aio_offset=0, aio_nbytes=len_buf,
aio_reqprio=gen_io_priority(IOCBPriorityClass.IDLE, 10),
aio_flags=IOCBFlag.IOPRIO)
submit_ret = io_submit(ctx, c_long(1), create_c_array(iocb_p, (pointer(iocb),)))
self.assertEqual(1, submit_ret)
event = IOEvent()
get_event_ret = io_getevents(ctx, c_long(1), c_long(1), create_c_array(IOEvent, (event,)), None)
self.assertEqual(1, get_event_ret)
self.assertEqual(fp.read(len_buf), buf.strip().decode())
io_destroy(ctx)
def test_writev(self):
with open('test.txt', 'w+') as fp:
ctx = aio_context_t()
io_setup(c_uint(1), pointer(ctx))
self.assertNotEqual(0, ctx.value)
contents1 = 'This is a long sample text.'
len_contents1 = len(contents1)
arr_p1 = cast(c_char_p(contents1.encode()), c_void_p)
vec1 = IOVec(arr_p1, len_contents1)
contents2 = '\nThis is a long sample text 2.'
len_contents2 = len(contents2)
arr_p2 = cast(c_char_p(contents2.encode()), c_void_p)
vec2 = IOVec(arr_p2, len_contents2)
vec_arr = create_c_array(IOVec, (vec1, vec2))
iocb = IOCB(aio_lio_opcode=IOCBCMD.PWRITEV, aio_fildes=fp.fileno(),
aio_buf=addressof(vec_arr), aio_offset=0, aio_nbytes=2)
submit_ret = io_submit(ctx, c_long(1), create_c_array(iocb_p, (pointer(iocb),)))
self.assertEqual(1, submit_ret)
event = IOEvent()
get_event_ret = io_getevents(ctx, c_long(1), c_long(1), create_c_array(IOEvent, (event,)), None)
self.assertEqual(1, get_event_ret)
fp.seek(0)
self.assertEqual(contents1 + contents2, fp.read(len_contents1 + len_contents2))
io_destroy(ctx)
def test_readv(self):
with open('/etc/passwd') as fp:
ctx = aio_context_t()
io_setup(c_uint(1), pointer(ctx))
self.assertNotEqual(0, ctx.value)
len_buf1 = 64
buf1 = bytearray(len_buf1)
arr_t1 = c_char * len_buf1
arr_p1 = cast(arr_t1.from_buffer(buf1), c_void_p)
vec1 = IOVec(arr_p1, len_buf1)
len_buf2 = 32
buf2 = bytearray(len_buf2)
arr_t2 = c_char * len_buf2
arr_p2 = cast(arr_t2.from_buffer(buf2), c_void_p)
vec2 = IOVec(arr_p2, len_buf2)
vec_arr = create_c_array(IOVec, (vec1, vec2))
iocb = IOCB(aio_lio_opcode=IOCBCMD.PREADV, aio_fildes=fp.fileno(),
aio_buf=addressof(vec_arr), aio_offset=0, aio_nbytes=2)
submit_ret = io_submit(ctx, c_long(1), create_c_array(iocb_p, (pointer(iocb),)))
self.assertEqual(1, submit_ret)
event = IOEvent()
get_event_ret = io_getevents(ctx, c_long(1), c_long(1), create_c_array(IOEvent, (event,)), None)
self.assertEqual(1, get_event_ret)
self.assertEqual(fp.read(len_buf1 + len_buf2), buf1.strip().decode() + buf2.strip().decode())
io_destroy(ctx)
def test_invalid_getevents(self):
ctx = aio_context_t()
io_setup(c_uint(1), pointer(ctx))
with self.assertRaises(OSError) as assertion:
io_getevents(ctx, c_long(-1), c_long(1), None, None)
self.assertEqual(errno.EINVAL, assertion.exception.errno)
def test_empty_getevents(self):
ctx = aio_context_t()
io_setup(c_uint(10), pointer(ctx))
self.assertNotEqual(0, ctx.value)
ret = io_getevents(ctx, c_long(0), c_long(100), create_c_array(IOEvent, (), 0), None)
self.assertEqual(0, ret)
io_destroy(ctx)
def test_empty_submit(self):
ctx = aio_context_t()
io_setup(c_uint(10), pointer(ctx))
self.assertNotEqual(0, ctx.value)
ret = io_submit(ctx, c_long(0), create_c_array(iocb_p, (), 0))
self.assertEqual(0, ret)
io_destroy(ctx)
def test_exceed_max_nr(self):
with open('/proc/sys/fs/aio-max-nr') as fp:
max_nr = int(fp.read())
with self.assertRaises(OSError) as assertion:
ctx = aio_context_t()
io_setup(c_uint(max_nr + 1), pointer(ctx))
self.assertEqual(errno.EAGAIN, assertion.exception.errno)
def test_submit_with_invalid_ctx(self):
with self.assertRaises(OSError) as assertion:
with open('/etc/passwd') as fp:
iocb = IOCB(aio_lio_opcode=IOCBCMD.PREAD, aio_fildes=fp.fileno())
submit_ret = io_submit(aio_context_t(10), c_long(1), create_c_array(iocb_p, (pointer(iocb),)))
self.assertEqual(1, submit_ret)
self.assertEqual(errno.EINVAL, assertion.exception.errno)
def test_double_destroy(self):
ctx = aio_context_t()
io_setup(c_uint(1), pointer(ctx))
self.assertNotEqual(0, ctx.value)
io_destroy(ctx)
with self.assertRaises(OSError) as assertion:
io_destroy(ctx)
self.assertEqual(errno.EINVAL, assertion.exception.errno)
def test_invalid_priority_req(self):
fp = open('/etc/passwd')
ctx = aio_context_t()
io_setup(c_uint(1), pointer(ctx))
self.assertNotEqual(0, ctx.value)
len_buf = 64
buf = bytearray(len_buf)
arr_t = c_char * len_buf
arr_p = cast(arr_t.from_buffer(buf), c_void_p)
iocb = IOCB(aio_lio_opcode=IOCBCMD.PREAD, aio_fildes=fp.fileno(),
aio_buf=arr_p.value, aio_offset=0, aio_nbytes=len_buf,
aio_resfd=5, aio_flags=IOCBFlag.RESFD)
with self.assertRaises(OSError) as assertion:
io_submit(ctx, c_long(1), create_c_array(iocb_p, (pointer(iocb),)))
self.assertEqual(errno.EBADF, assertion.exception.errno)
io_destroy(ctx)
fp.close()
def test_write(self):
with open('test.txt', 'w+') as fp:
ctx = aio_context_t()
io_setup(c_uint(1), pointer(ctx))
self.assertNotEqual(0, ctx.value)
contents = 'This is a long sample text.'
len_contents = len(contents)
arr_p = cast(c_char_p(contents.encode()), c_void_p)
iocb = IOCB(aio_lio_opcode=IOCBCMD.PWRITE, aio_fildes=fp.fileno(),
aio_buf=arr_p.value, aio_offset=0, aio_nbytes=len_contents)
submit_ret = io_submit(ctx, c_long(1), create_c_array(iocb_p, (pointer(iocb),)))
self.assertEqual(1, submit_ret)
event = IOEvent()
get_event_ret = io_getevents(ctx, c_long(1), c_long(1), create_c_array(IOEvent, (event,)), None)
self.assertEqual(1, get_event_ret)
self.assertEqual(contents, fp.read(len_contents))
io_destroy(ctx)
def test_ctx_setup(self):
ctx = aio_context_t()
io_setup(c_uint(10), pointer(ctx))
self.assertNotEqual(0, ctx.value)
io_destroy(ctx)
def close(self) -> None:
"""will block on the completion of all operations that could not be canceled"""
if not self.closed:
io_destroy(self._ctx)
self._ctx = aio_context_t()
def __init__(self, max_jobs: int) -> None:
self._ctx = aio_context_t()
self._max_jobs = max_jobs
io_setup(c_uint(max_jobs), pointer(self._ctx))