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authorNicolas Schodet2009-02-09 20:05:30 +0100
committerNicolas Schodet2009-02-09 20:05:30 +0100
commit2e95e3a33bcb34aeec66551503c692c1cb80ab61 (patch)
tree6b763ee0d1bf458da0ced13f44535b42f3b8efb8 /host/mex/node.py
parent552b28da98a387d13aea7403a7e72732a913277d (diff)
* all python:
- changed tabs to spaces.
Diffstat (limited to 'host/mex/node.py')
-rw-r--r--host/mex/node.py188
1 files changed, 94 insertions, 94 deletions
diff --git a/host/mex/node.py b/host/mex/node.py
index 3307a4d7..2a6a5d22 100644
--- a/host/mex/node.py
+++ b/host/mex/node.py
@@ -30,128 +30,128 @@ from struct import pack, unpack, calcsize
class Node:
class closed:
- """Raised on closed connection."""
- pass
+ """Raised on closed connection."""
+ pass
def __init__ (self, addr = mex.DEFAULT_ADDR):
- """Create a new Node and connect it to given Hub address."""
- self.socket = socket.socket ()
- self.socket.setsockopt (socket.SOL_TCP, socket.TCP_NODELAY, 1)
- self.socket.connect (addr)
- self.date = 0
- self.seq = 0
- self.req = None
- self.handlers = { }
- self.register (mex.DATE, lambda msg: self.handle_DATE (msg))
- self.register (mex.REQ, lambda msg: self.handle_REQ (msg))
- # Synchronise.
- rsp = None
- while rsp == None or rsp.mtype != mex.DATE:
- rsp = self.recv ()
- self.dispatch (rsp)
+ """Create a new Node and connect it to given Hub address."""
+ self.socket = socket.socket ()
+ self.socket.setsockopt (socket.SOL_TCP, socket.TCP_NODELAY, 1)
+ self.socket.connect (addr)
+ self.date = 0
+ self.seq = 0
+ self.req = None
+ self.handlers = { }
+ self.register (mex.DATE, lambda msg: self.handle_DATE (msg))
+ self.register (mex.REQ, lambda msg: self.handle_REQ (msg))
+ # Synchronise.
+ rsp = None
+ while rsp == None or rsp.mtype != mex.DATE:
+ rsp = self.recv ()
+ self.dispatch (rsp)
def wait (self, date = None):
- """Wait forever or until a date is reached."""
- while date == None or self.date != date:
- idle = Msg (mex.IDLE)
- if date != None:
- idle.push ('L', date)
- self.send (idle)
- msg = self.recv ()
- self.dispatch (msg)
+ """Wait forever or until a date is reached."""
+ while date == None or self.date != date:
+ idle = Msg (mex.IDLE)
+ if date != None:
+ idle.push ('L', date)
+ self.send (idle)
+ msg = self.recv ()
+ self.dispatch (msg)
def wait_async (self, date = None):
- """Asynchronous version of wait. This should not be called again
- until sync return True."""
- self.async_waited = date
- synced = self.sync ()
- assert not synced
+ """Asynchronous version of wait. This should not be called again
+ until sync return True."""
+ self.async_waited = date
+ synced = self.sync ()
+ assert not synced
def sync (self):
- """To be called after read or wait_async. Return True if the waited
- date is reached or signal the Hub our waiting status."""
- if self.date == self.async_waited:
- return True
- else:
- idle = Msg (mex.IDLE)
- if self.async_waited != None:
- idle.push ('L', self.async_waited)
- self.send (idle)
+ """To be called after read or wait_async. Return True if the waited
+ date is reached or signal the Hub our waiting status."""
+ if self.date == self.async_waited:
+ return True
+ else:
+ idle = Msg (mex.IDLE)
+ if self.async_waited != None:
+ idle.push ('L', self.async_waited)
+ self.send (idle)
def read (self):
- """Used for asynchronous operations. Handle incoming data. The sync
- method should be called after this one returns."""
- msg = self.recv ()
- self.dispatch (msg)
+ """Used for asynchronous operations. Handle incoming data. The sync
+ method should be called after this one returns."""
+ msg = self.recv ()
+ self.dispatch (msg)
def send (self, msg):
- """Send a message."""
- data = msg.data ()
- packet = pack (mex.HEADER_FMT, len (data), self.seq) + data
- self.socket.sendall (packet)
+ """Send a message."""
+ data = msg.data ()
+ packet = pack (mex.HEADER_FMT, len (data), self.seq) + data
+ self.socket.sendall (packet)
def request (self, msg):
- """Send a request and return response."""
- # Send request.
- req = Msg (mex.REQ)
- req.push ('B', 0)
- req.push (msg.data ())
- self.send (req)
- # Wait for response.
- rsp = self.recv ()
- while rsp.mtype != mex.RSP:
- self.dispatch (rsp)
- rsp = self.recv ()
- # Discard reqid.
- rsp.pop ('B')
- return Msg (rsp.pop ())
+ """Send a request and return response."""
+ # Send request.
+ req = Msg (mex.REQ)
+ req.push ('B', 0)
+ req.push (msg.data ())
+ self.send (req)
+ # Wait for response.
+ rsp = self.recv ()
+ while rsp.mtype != mex.RSP:
+ self.dispatch (rsp)
+ rsp = self.recv ()
+ # Discard reqid.
+ rsp.pop ('B')
+ return Msg (rsp.pop ())
def response (self, msg):
- """Send a response to the currently serviced request."""
- assert self.req != None
- rsp = Msg (mex.RSP)
- rsp.push ('B', self.req)
- self.req = None
- rsp.push (msg.data ())
- self.send (rsp)
+ """Send a response to the currently serviced request."""
+ assert self.req != None
+ rsp = Msg (mex.RSP)
+ rsp.push ('B', self.req)
+ self.req = None
+ rsp.push (msg.data ())
+ self.send (rsp)
def register (self, mtype, handler):
- """Register an handler for the given message type."""
- assert mtype not in self.handlers
- self.handlers[mtype] = handler
+ """Register an handler for the given message type."""
+ assert mtype not in self.handlers
+ self.handlers[mtype] = handler
def close (self):
- """Close connection with the Hub."""
- self.socket.close ()
- self.socket = None
+ """Close connection with the Hub."""
+ self.socket.close ()
+ self.socket = None
def fileno (self):
- """Return socket fileno () for asynchronous operations."""
- return self.socket.fileno ()
+ """Return socket fileno () for asynchronous operations."""
+ return self.socket.fileno ()
def recv (self):
- """Receive one message."""
- head = self.socket.recv (calcsize (mex.HEADER_FMT))
- if head == '':
- self.close ()
- raise Node.closed
- size, self.seq = unpack (mex.HEADER_FMT, head)
- data = self.socket.recv (size)
- return Msg (data)
+ """Receive one message."""
+ head = self.socket.recv (calcsize (mex.HEADER_FMT))
+ if head == '':
+ self.close ()
+ raise Node.closed
+ size, self.seq = unpack (mex.HEADER_FMT, head)
+ data = self.socket.recv (size)
+ return Msg (data)
def dispatch (self, msg):
- """Call the right handler for the given message."""
- if msg.mtype in self.handlers:
- self.handlers[msg.mtype] (msg)
+ """Call the right handler for the given message."""
+ if msg.mtype in self.handlers:
+ self.handlers[msg.mtype] (msg)
def handle_DATE (self, msg):
- """Handle an incoming DATE."""
- self.date, = msg.pop ('L')
+ """Handle an incoming DATE."""
+ self.date, = msg.pop ('L')
def handle_REQ (self, msg):
- """Handle an incoming REQ."""
- self.req, = msg.pop ('B')
- dec = Msg (msg.pop ())
- self.dispatch (dec)
- self.req = None
+ """Handle an incoming REQ."""
+ self.req, = msg.pop ('B')
+ dec = Msg (msg.pop ())
+ self.dispatch (dec)
+ self.req = None