Hi
In the raw API there is a dedecated callback that tells me that the data is out
and confirmed. I have been looking for something similar in the netconn API (in
order to know when a buffer used in netconn_write can be freed without having
to use NETCONN_COPY). I tried creating a netconn using
"xNetConn = netconn_new_with_callback ( NETCONN_TCP, NetConnClientCallback );"
// netconn kept alive until no transfer for a few seconds
// called in the context of the TCP thread
statuc void NetConnClientCallback ( TNetConn aConn, ENetEvent aEv, UInt16 aLen )
{
if ( aEv == NETCONN_EVT_SENDPLUS )
{
mClientSendCnt -= aLen;
if ( mClientSendCnt == 0 )
RTOS_SemPost ( gSemTcpClnHandle );
}
} // NetConnClientCallback
Basically it works, i.e. the semaphore is eventually posted, but unbearably
slow (delay of ca. 200ms for each frame). Without this callback, using
NETCONN_COPY for netconn_write, the throughput is at least 120 times better.
Thus I conclude that I have misused the callback function for something it is
not designed for. On the other hand I do not find a better way to get a "done"
trigger. Is there a better way or do I have to copy the outgoing data (which
would violate the concept of a non-copy interface)?
Walter
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SOLON Inverters AG
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www.solon.com <http://www.soloninverters.com/>
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