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

NAME

       dat_ep_set_watermark - set high watermark on Endpoint

SYNOPSIS

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

       DAT_RETURN
	   dat_ep_set_watermark (
	   IN	   DAT_EP_HANDLE      ep_handle,
	   IN	   DAT_COUNT	      soft_high_watermark,
	   IN	   DAT_COUNT	      hard_high_watermark
	   )

PARAMETERS

       ep_handle	      The handle for an instance of an Endpoint.

       soft_high_watermark    The soft high watermark for the number of Recv buffers consumed by the Endpoint.

       hard_high_watermark    The hard high watermark for the number of Recv buffers consumed by the Endpoint.

DESCRIPTION

       The  dat_ep_set_watermark() function sets the soft and hard high watermark values for EP and arms EP for generating asynchronous events for
       high watermarks. An asynchronous event will be generated for IA async_evd when the number of Recv buffers  at  EP  exceeds  the	soft  high
       watermark  for the first time. A connection broken event will be generated for EP connect_evd when the number of Recv buffers at EP exceeds
       the hard high watermark. These can occur during this call or when EP takes a buffer from the SRQ or EP RQ. The soft and hard high watermark
       asynchronous event generation and setting are independent of each other.

       The asynchronous event for a soft high watermark is generated only once per setting. Once an event is generated, no new asynchronous events
       for the soft high watermark is generated until the EP is again set for the soft high watermark. If the Consumer is once again interested in
       the event, the Consumer should again set the soft high watermark.

       If  the Consumer is not interested in a soft or hard high watermark, the value of DAT_WATERMARK_INFINITE can be specified for the case that
       is the default value. This value specifies that a non-asynchronous event will be generated for a high watermark EP attribute for which this
       value  is set. It does not prevent generation of a connection broken event for EP when no Recv buffer is available for a message arrived on
       the EP connection.

       The operation is supported for all states of Endpoint.

RETURN VALUES

       DAT_SUCCESS		  The operation was successful.

       DAT_INVALID_HANDLE	  The ep_handle argument is an invalid DAT handle.

       DAT_INVALID_PARAMETER	  One of the parameters is invalid.

       DAT_MODEL_NOT_SUPPORTED	  The requested Model was not supported by the Provider. The Provider does not support EP Soft or Hard High Water-
				  marks.

USAGE

       For a hard high watermark, the Provider is ready to generate a connection broken event as soon as the connection is established.

       If  the	asynchronous  event  for  a soft or hard high watermark has not yet been generated, this call simply modifies the values for these
       attributes. The Provider remains armed for generation of these asynchronous events.

       Regardless of whether an asynchronous event for the soft and hard high watermark has been generated, this operation will set the generation
       of an asynchronous event with the Consumer-provided high watermark values. If the new high watermark values are below the current number of
       Receive DTOs at EP, an asynchronous event will be generated immediately. Otherwise the old soft or hard (or both) high watermark values are
       simply replaced with the new ones.

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

SunOS 5.11							    16 Jul 2004 					dat_ep_set_watermark(3DAT)