?? evce.c
字號:
/* Event group pointer is invalid, indicate in completion status. */
status = NU_INVALID_GROUP;
/* Return completion status. */
return(status);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* EVCE_Set_Events */
/* */
/* DESCRIPTION */
/* */
/* This function performs error checking on the parameters supplied */
/* to the set events function. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* EVC_Set_Events Actual set events function */
/* */
/* INPUTS */
/* */
/* event_group_ptr Event Group control block ptr*/
/* events Event flag setting */
/* operation Operation to perform on the */
/* event flag group (AND/OR) */
/* */
/* OUTPUTS */
/* */
/* NU_INVALID_GROUP Event group control block */
/* pointer is invalid */
/* NU_INVALID_OPERATION Event operation is invalid */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 03-01-1994 Modified function interface, */
/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* */
/*************************************************************************/
STATUS EVCE_Set_Events(NU_EVENT_GROUP *event_group_ptr, UNSIGNED events,
OPTION operation)
{
EV_GCB *event_group; /* Event control block ptr */
STATUS status; /* Completion status */
/* Move input event group pointer into internal pointer. */
event_group = (EV_GCB *) event_group_ptr;
/* Determine if event group pointer is invalid. */
if (event_group == NU_NULL)
/* Event group pointer is invalid, indicate in completion status. */
status = NU_INVALID_GROUP;
else if (event_group -> ev_id != EV_EVENT_ID)
/* Event group pointer is invalid, indicate in completion status. */
status = NU_INVALID_GROUP;
else if ((operation != NU_AND) && (operation != NU_OR))
/* Invalid operation on the event flag group. */
status = NU_INVALID_OPERATION;
else
/* Parameters are valid, call actual function. */
status = EVC_Set_Events(event_group_ptr, events, operation);
/* Return the completion status. */
return(status);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* EVCE_Retrieve_Events */
/* */
/* DESCRIPTION */
/* */
/* This function performs error checking on the parameter supplied */
/* to the retrieve events function. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* EVC_Retrieve_Events Retrieve event flags */
/* TCCE_Suspend_Error Check for suspend validity */
/* */
/* INPUTS */
/* */
/* event_group_ptr Event Group control block ptr*/
/* requested_events Requested event flags */
/* operation AND/OR selection of flags */
/* retrieved_events Pointer to destination for */
/* actual flags retrieved */
/* suspend Suspension option */
/* */
/* OUTPUTS */
/* */
/* NU_INVALID_GROUP Event group control block */
/* pointer is invalid */
/* NU_INVALID_POINTER Received event flag pointer */
/* is NULL */
/* NU_INVALID_OPERATION Event operation is invalid */
/* NU_INVALID_SUSPEND Invalid suspension request */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 03-01-1994 Modified function interface, */
/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* */
/*************************************************************************/
STATUS EVCE_Retrieve_Events(NU_EVENT_GROUP *event_group_ptr,
UNSIGNED requested_events, OPTION operation,
UNSIGNED *retrieved_events, UNSIGNED suspend)
{
EV_GCB *event_group; /* Event control block ptr */
STATUS status; /* Completion status */
/* Move input event group pointer into internal pointer. */
event_group = (EV_GCB *) event_group_ptr;
/* Determine if event group pointer is invalid. */
if (event_group == NU_NULL)
/* Event group pointer is invalid, indicate in completion status. */
status = NU_INVALID_GROUP;
else if (event_group -> ev_id != EV_EVENT_ID)
/* Event group pointer is invalid, indicate in completion status. */
status = NU_INVALID_GROUP;
else if ((operation != NU_AND) &&
(operation != NU_AND_CONSUME) &&
(operation != NU_OR) &&
(operation != NU_OR_CONSUME))
/* Invalid operation on the event flag group. */
status = NU_INVALID_OPERATION;
else if ((suspend) && (TCCE_Suspend_Error()))
/* Suspension from an non-task thread. */
status = NU_INVALID_SUSPEND;
else if (retrieved_events == NU_NULL)
/* Retrieved events pointer is NULL. */
status = NU_INVALID_POINTER;
else
/* Parameters are valid, call actual function. */
status = EVC_Retrieve_Events(event_group_ptr, requested_events,
operation, retrieved_events, suspend);
/* Return the completion status. */
return(status);
}
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