Content-type: text/html Man page of rsm_memseg_import_open_barrier

rsm_memseg_import_open_barrier

Section: Remote Shared Memory Library Functions (3RSM)
Updated: 8 Jun 2001
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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 detection 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 completed successfully. Any individual failures which may have occured between the open barrier and close barrier occur without any notification 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 StabilityEvolving
MT-LevelMT-Safe

 

SEE ALSO

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
ATTRIBUTES
SEE ALSO

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Time: 02:38:33 GMT, October 02, 2010