/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
*
* MODULE: dapl_cno_wait.c
*
* PURPOSE: Wait for a consumer notification event
* Description: Interfaces in this file are completely described in
* the DAPL 1.1 API, Chapter 6, section 3.2.3
*
* $Id: dapl_cno_wait.c,v 1.6 2003/06/16 17:53:32 sjs2 Exp $
*/
#include "dapl.h"
#include "dapl_adapter_util.h"
#include "dapl_ring_buffer_util.h"
/*
* dapl_cno_wait
*
* DAPL Requirements Version xxx, 6.3.2.3
*
* Wait for a consumer notification event
*
* Input:
* cno_handle
* timeout
* evd_handle
*
* Output:
* evd_handle
*
* Returns:
* DAT_SUCCESS
* DAT_INVALID_HANDLE
* DAT_QUEUE_EMPTY
* DAT_INVALID_PARAMETER
*/
{
int nevents;
goto bail;
}
goto bail;
}
return (DAT_ERROR(DAT_QUEUE_EMPTY, 0));
}
/* scan evd list */
for (;;) {
/*
* Check the evd ring buffer for events, if nothing is found
* peek into the CQ to see if there are events
*/
break;
}
nevents = 0;
if (nevents > 0) {
break;
}
break;
}
}
/* shift list by one to simulate round-robin */
head_evd_ptr = (DAPL_EVD *)
*evd_handle = evd_ptr;
return (DAT_SUCCESS);
}
cno_ptr->cno_waiters++;
cno_ptr->cno_waiters--;
/* verify that evd_ptr is still in the list */
for (;;) {
break;
}
head_evd_ptr = (DAPL_EVD *)
}
} else if (dat_status == DAT_SUCCESS) {
/*
* After the first triggering, this will be a valid handle.
* If we're racing with wakeups of other CNO waiters,
* that's ok.
*/
*evd_handle = evd_ptr;
} else {
}
}
/*
* The only other reason we could have made it out of
* the loop is a timeout.
*/
bail:
return (dat_status);
}