LIRC libraries
Linux Infrared Remote Control
Loading...
Searching...
No Matches
async_client.py
1''' Asynchronous python bindings for the lircd socket interface. '''
2
8
9
39
40# pylint: disable=W0613
41
42import asyncio
43from lirc.client import AbstractConnection as AbstractConnection
44
45
46class AsyncConnection(object):
47 ''' Asynchronous read interface on top of an AbstractConnection.
48
49 Parameters:
50 - connection: Typically a lirc.RawConnection or lirc.LircdConnection.
51 - loop: AbstractEventLoop, typically obtained using
52 asyncio.get_event_loop().
53 '''
54
55 def __init__(self, connection: AbstractConnection,
56 loop: asyncio.AbstractEventLoop):
57
58 def read_from_fd():
59 ''' Read data from the connection fd and put into queue. '''
60 line = self._conn.readline(0)
61 if line:
62 asyncio.ensure_future(self._queue.put(line))
63
64 self._conn = connection
65 self._loop = loop
66 self._queue = asyncio.Queue()
67 self._loop.add_reader(self._conn.fileno(), read_from_fd)
68
69 def close(self):
70 ''' Clean up loop and the base connection. '''
71 self._loop.remove_reader(self._conn.fileno())
72
73 async def readline(self) -> str:
74 ''' Asynchronous get next line from the connection. '''
75 return await self._queue.get()
76
77 def __aiter__(self):
78 ''' Return async iterator. '''
79 return self
80
81 async def __anext__(self):
82 ''' Implement async iterator.next(). '''
83 return await self._queue.get()
84
85 async def __aenter__(self):
86 ''' Implement "async with". '''
87 return self
88
89 async def __aexit__(self, exc_type, exc, traceback):
90 ''' Implement exit from "async with". '''
91 self.close()
92
93