# OSocketStream

from pandac.PandaModules import OSocketStream

Class : OSocketStream
Description : A base class for ostreams that write to a (possibly non-blocking) socket. It adds is_closed(), which can be called after any write operation fails to check whether the socket has been closed, or whether more data may be sent later.

## Inheritance:

OSocketStream: ostream SSWriter
ostream:
SSWriter:

## Methods of OSocketStream:

close
flush
isClosed

## Methods of ostream:

flush
put

## Methods of SSWriter:

close
considerFlush
flush
getCollectTcp
getCollectTcpInterval
isClosed
sendDatagram
setCollectTcp
setCollectTcpInterval

close virtual void OSocketStream::close(void) = 0; Undocumented function.

flush bool OSocketStream::flush(void); Description: Sends the most recently queued data now. This only has meaning if set_collect_tcp() has been set to true.

isClosed virtual bool OSocketStream::is_closed(void) = 0; Undocumented function.

flush void ostream::flush(void); Undocumented function.

put void ostream::put(char c); Undocumented function.

close virtual void SSWriter::close(void) = 0; Undocumented function.

considerFlush bool SSWriter::consider_flush(void); Description: Sends the most recently queued data if enough time has elapsed. This only has meaning if set_collect_tcp() has been set to true.

flush bool SSWriter::flush(void); Description: Sends the most recently queued data now. This only has meaning if set_collect_tcp() has been set to true.

getCollectTcp bool SSWriter::get_collect_tcp(void) const; Description: Returns the current setting of "collect-tcp" mode. See set_collect_tcp().

getCollectTcpInterval double SSWriter::get_collect_tcp_interval(void) const; Description: Returns the interval in time, in seconds, for which to hold TCP packets before sending all of the recently received packets at once. This only has meaning if "collect-tcp" mode is enabled; see set_collect_tcp().

isClosed virtual bool SSWriter::is_closed(void) = 0; Undocumented function.

sendDatagram bool SSWriter::send_datagram(Datagram const &dg); Description: Transmits the indicated datagram over the socket by prepending it with a little-endian 16-bit byte count. Does not return until the data is sent or the connection is closed, even if the socket stream is non-blocking.

setCollectTcp void SSWriter::set_collect_tcp(bool collect_tcp); Description: Enables or disables "collect-tcp" mode. In this mode, individual TCP packets are not sent immediately, but rather they are collected together and accumulated to be sent periodically as one larger TCP packet. This cuts down on overhead from the TCP/IP protocol, especially if many small packets need to be sent on the same connection, but it introduces additional latency (since packets must be held before they can be sent). See set_collect_tcp_interval() to specify the interval of time for which to hold packets before sending them. If you enable this mode, you may also need to periodically call consider_flush() to flush the queue if no packets have been sent recently.

setCollectTcpInterval void SSWriter::set_collect_tcp_interval(double interval); Description: Specifies the interval in time, in seconds, for which to hold TCP packets before sending all of the recently received packets at once. This only has meaning if "collect-tcp" mode is enabled; see set_collect_tcp().