
{    The purpose of this request is to get an entry from the critical window
{    log.
{
{       LGP$GET_ENTRY_FROM_CRITICAL_LOG (LOG_CYCLE, LOG_DATA,
{             LOG_ENTRY_SIZE, LOG_ENTRY, STATUS)
{
{ LOG_CYCLE: (input)  Specifies the cycle of the critical window log which
{ LOG_DATA references.
{       It must match the active system log cycle or the request will fail.
{       This protects against the problems that would arise from trying to read
{       entries from a log that is being terminated (log termination increments
{       the log cycle).
{
{ LOG_DATA: (input, output)  Specifies the entry in the critical window log
{ which the
{       request is to get.  After this request returns, LOG_DATA is updated to
{       point at the next log entry.
{
{ LOG_ENTRY_SIZE: (output)  Variable to receive the actual size of the log
{       entry.
{
{ LOG_ENTRY: (output)  Variable to recieve a copy of the log entry.  Only as
{       much of the log entry as will fit will be returned.  The actual log
{       entry size is returned in the log entry header record.
{
{ STATUS: (output) Variable to receive the completion status.
{      CONDITION: None
