SCO OpenServer
mditx_interface(D3mdi)
mditx_interface --
Single-threaded interface routine for MP-aware drivers
Synopsis (Not in SVR5 version)
#include <sys/mdi.h>
void mditx_interface(mditx_IF_t * txint, mblk_t * msg);
Description
The
mditx_interface(D3mdi)
function
is called from the driver's
put( ),
service( ),
and interrupt
routines to service the driver's write queue,
and for the
put( )
routine,
to issue a new transmit request to the adapter.
The service routine and interrupt routine call
mditx_interface( )
with msg set to NULL.
The
put( )
routine calls
mditx_interface( )
with a valid, non-NULL msg .
Usage
The actual code for this routine is provided below:
void
mditx_interface(mditx_IF_t * txint, mblk_t * msg)
{
mblk_t * qmsg;
if (mdi_trylock(&txint->trylock) == TRUE) {
while ((*txint->tx_avail)(txint->handle) && (qmsg = getq(txint->q)))
(*txint->process_msg)(txint->handle, qmsg);
if (msg != NULL) {
if (!txint->q->q_first && (*txint->tx_avail)(txint->handle))
(*txint->process_msg)(txint->handle, msg);
else
putq(txint->q, msg);
}
mdi_tryunlock(&txint->trylock);
}
else if (msg != NULL)
putq(txint->q, msg);
return;
}
Context and synchronization
Blockable
context.
Hardware applicability
All
Version applicability
mdi:
1
Differences between versions
This function is not supported in MDI on SVR5
systems.
In DDI 8, use the
mdi_tx_if_init(D3mdi)
and related functions instead of
mditx_interface( ).
Return values
None.
References
mditx_interfaceMT(D3mdi),
mditx_register(D3mdi),
mdi_trylock(D3mdi)
19 June 2005
© 2005 The SCO Group, Inc. All rights reserved.
OpenServer 6 and UnixWare (SVR5) HDK - June 2005