rsm_memseg_import_open_barrier(3RSM)		      Remote Shared Memory Library Functions		      rsm_memseg_import_open_barrier(3RSM)

NAME

       rsm_memseg_import_open_barrier,	rsm_memseg_import_order_barrier,  rsm_memseg_import_close_barrier  -  remote memory access error detection
       functions

SYNOPSIS

       cc [ flag... ] file... -lrsm [ library... ]
       #include <rsmapi.h>

       int rsm_memseg_import_open_barrier(rsmapi_barrier_t *barrier);

       int rsm_memseg_import_order_barrier(rsmapi_barrier_t *barrier);

       int rsm_memseg_import_close_barrier(rsmapi_barrier_t *barrier);

DESCRIPTION

       The  rsm_memseg_import_open_barrier() and  rsm_memseg_import_close_barrier() functions provide a means of remote memory access error detec-
       tion  when the barrier mode is set to RSM_BARRIER_MODE_EXPLICIT. Open and close barrier operations define a span-of-time interval for error
       detection. A successful close barrier guarantees that remote memory access covered between the open barrier and	close  barrier	have  com-
       pleted  successfully. Any individual failures which may have occured between the open barrier and close barrier occur without any notifica-
       tion and the failure is not reported until the close barrier.

       The rsm_memseg_import_order_barrier() function imposes the order-of-write completion whereby, with an order barrier, the  write	operations
       issued  before the order barrier are all completed before the operations after the order barrier. Effectively, with the order barrier call,
       all writes within one barrier scope are ordered with respect to those in another barrier scope.

RETURN VALUES

       Upon successful completion, these functions return 0. Otherwise, an error value is returned to indicate the error.

ERRORS

       The rsm_memseg_import_open_barrier(), rsm_memseg_import_order_barrier(), and rsm_memseg_import_close_barrier()  functions  can  return  the
       following errors:

       RSMERR_BAD_SEG_HNDL	  Invalid segment handle

       RSMERR_BAD_BARRIER_PTR	  Invalid barrier pointer.

       The rsm_memseg_close_barrier() and rsm_memseg_order_barrier() functions can return the following errors:

       RSMERR_BARRIER_UNINITIALIZED

	   Barrier not initialized.

       RSMERR_BARRIER_NOT_OPENED

	   Barrier not opened.

       RSMERR_BARRIER_FAILURE

	   Memory access error.

       RSMERR_CONN_ABORTED

	   Connection aborted.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |ATTRIBUTE TYPE		     |ATTRIBUTE VALUE		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       rsm_memseg_import_init_barrier(3RSM), rsm_memseg_import_set_mode(3RSM), attributes(5)

SunOS 5.11							    8 Jun 2001				      rsm_memseg_import_open_barrier(3RSM)