dat_srq_set_lw(3DAT)				     Direct Access Transport Library Functions				      dat_srq_set_lw(3DAT)

NAME

       dat_srq_set_lw - set low watermark on shared receive queue

SYNOPSIS

       cc [ flag... ] file... -ldat [ library... ]
       #include <dat/udat.h>

       DAT_RETURN
	   dat_srq_set_lw (
	       IN      DAT_SRQ_HANDLE	   srq_handle,
	       IN      DAT_COUNT	   low_watermark
	   )

PARAMETERS

       srq_handle	A handle for an instance of a Shared Receive Queue.

       low_watermark	The low watermark for the number of Recv buffers on SRQ.

DESCRIPTION

       The  dat_srq_set_lw()  function	sets the low watermark value for the SRQ and arms the SRQ for generating an asynchronous event for the low
       watermark. An asynchronous event will be generated when the number of buffers on the SRQ is below the low watermark  for  the  first  time.
       This can occur during the current call or when an associated EP takes a buffer from the SRQ.

       The asynchronous event will be generated only once per setting of the low watermark. Once an event is generated, no new asynchronous events
       for the number of buffers inthe SRQ below the specified value will be generated until the SRQ is again set for the Low  Watermark.  If  the
       Consumer is again interested in the event, the Consumer should set the low watermark again.

RETURN VALUES

       DAT_SUCCESS		  The operation was successful.

       DAT_INVALID_HANDLE	  The srq_handle argument is an invalid DAT handle.

       DAT_INVALID_PARAMETER	  Invalid parameter; the value of low_watermark is exceeds the value of max_recv_dtos.

       DAT_MODEL_NOT_SUPPORTED	  The requested Model was not supported by the Provider. The Provider does not support SRQ Low Watermark.

USAGE

       Upon  receiving	the  asynchronous  event  for  the SRQ low watermark, the Consumer can replenish Recv buffers on the SRQ or take any other
       action that is appropriate.

       Regardless of whether an asynchronous event for the low watermark has been generated, this operation will set the generation  of  an  asyn-
       chronous  event	with the Consumer-provided low watermark value. If the new low watermark value is below the current number of free Receive
       DTOs posted to the SRQ, an asynchronous event will be generated immediately. Otherwise the old low watermark value is simply replaced  with
       the new one.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard: uDAPL, 1.2	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       dat_srq_create(3DAT), dat_srq_free(3DAT), dat_srq_post_recv(3DAT), dat_srq_query(3DAT), dat_srq_resize(3DAT), libdat(3LIB), attributes(5)

SunOS 5.11							    16 Jul 2004 					      dat_srq_set_lw(3DAT)