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

NAME

       dat_srq_resize - modify the size of the shared receive queue

SYNOPSIS

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

       DAT_RETURN
	   dat_srq_resize (
	   IN	   DAT_SRQ_HANDLE      srq_handle,
	   IN	   DAT_COUNT	       srq_max_recv_dto
	   )

PARAMETERS

       srq_handle      A handle for an instance of the SRQ.

       srq_max_recv_dtoThe new maximum number of Recv DTOs that Shared Receive Queue must hold.

DESCRIPTION

       The dat_srq_resize() function modifies the size of the queue of SRQ.

       Resizing  of  Shared  Receive  Queue should not cause any incoming messages on any of the EPs that use the SRQ to be lost. If the number of
       outstanding Recv buffers on the SRQ is larger then the requested srq_max_recv_dto, the  operation  returns  DAT_INVALID_STATE  and  do  not
       change  SRQ.  This  includes  not just the buffers on the SRQ but all outstanding Receive buffers that had been posted to the SRQ and whose
       completions have not reaped yet. Thus, the outstanding buffers include the buffers on SRQ, the buffers posted to SRQ at are at SRQ  associ-
       ated  EPs, and the buffers posted to SRQ for which completions have been generated but not yet reaped by Consumer from recv_evds of the EPs
       that use the SRQ.

       If the requested srq_max_recv_dto is below the SRQ low watermark, the operation returns DAT_INVALID_STATE and does not change SRQ.

RETURN VALUES

       DAT_SUCCESS

	   The operation was successful.

       DAT_INVALID_HANDLE

	   The srq_handle argument is an invalid DAT handle.

       DAT_INVALID_PARAMETER

	   The srq_max_recv_dto argument is invalid.

       DAT_INSUFFICIENT_RESOURCES

	   The operation failed due to resource limitations.

       DAT_INVALID_STATE

	   Invalid state. Either the number of entries on the SRQ exceeds the requested SRQ queue length or the  requested  SRQ  queue	length	is
	   smaller than the SRQ low watermark.

USAGE

       The  dat_srq_resize()  function is required not to lose any buffers. Thus, it cannot shrink below the outstanding number of Recv buffers on
       SRQ. There is no requirement to shrink the SRQ to return DAT_SUCCESS.

       The quality of the implementation determines how closely to the Consumer-requested value the Provider shrinks the  SRQ.	For  example,  the
       Provider  can  shrink  the  SRQ	to the Consumer-requested value and if the requested value is smaller than the outstanding buffers on SRQ,
       return DAT_INVALID_STATE; or the Provider can shrink to some value larger than that requested by the Consumer but below current	SRQ  size;
       or the Provider does not change the SRQ size and still returns DAT_SUCCESS.

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_set_lw(3DAT), libdat(3LIB), attributes(5)

SunOS 5.10							    16 Jul 2004 					      dat_srq_resize(3DAT)