?? smce.c
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/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* */
/*************************************************************************/
STATUS SMCE_Delete_Semaphore(NU_SEMAPHORE *semaphore_ptr)
{
SM_SCB *semaphore; /* Semaphore control blk ptr */
STATUS status; /* Completion status */
/* Move input semaphore pointer into internal pointer. */
semaphore = (SM_SCB *) semaphore_ptr;
/* Determine if the semaphore pointer is valid. */
if ((semaphore) && (semaphore -> sm_id == SM_SEMAPHORE_ID))
/* Semaphore pointer is valid, call function to delete it. */
status = SMC_Delete_Semaphore(semaphore_ptr);
else
/* Semaphore pointer is invalid, indicate in completion status. */
status = NU_INVALID_SEMAPHORE;
/* Return completion status. */
return(status);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* SMCE_Obtain_Semaphore */
/* */
/* DESCRIPTION */
/* */
/* This function performs error checking on the parameters supplied */
/* to the obtain semaphore function. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* SMC_Obtain_Semaphore Actual function to obtain an */
/* instance of the semaphore */
/* TCCE_Suspend_Error Check for illegal suspend */
/* */
/* INPUTS */
/* */
/* semaphore_ptr Semaphore control block ptr */
/* suspend Suspension option if full */
/* */
/* OUTPUTS */
/* */
/* NU_INVALID_SEMAPHORE Invalid semaphore pointer */
/* NU_INVALID_SUSPEND Suspension from non-task */
/* */
/* 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 SMCE_Obtain_Semaphore(NU_SEMAPHORE *semaphore_ptr, UNSIGNED suspend)
{
SM_SCB *semaphore; /* Semaphore control blk ptr */
STATUS status; /* Completion status */
/* Move input semaphore pointer into internal pointer. */
semaphore = (SM_SCB *) semaphore_ptr;
/* Determine if semaphore pointer is invalid. */
if (semaphore == NU_NULL)
/* Semaphore pointer is invalid, indicate in completion status. */
status = NU_INVALID_SEMAPHORE;
else if (semaphore -> sm_id != SM_SEMAPHORE_ID)
/* Semaphore pointer is invalid, indicate in completion status. */
status = NU_INVALID_SEMAPHORE;
else if ((suspend) && (TCCE_Suspend_Error()))
/* Suspension from an non-task thread. */
status = NU_INVALID_SUSPEND;
else
{
/* Parameters are valid, call actual function. */
status = SMC_Obtain_Semaphore(semaphore_ptr, suspend);
}
/* Return the completion status. */
return(status);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* SMCE_Release_Semaphore */
/* */
/* DESCRIPTION */
/* */
/* This function performs error checking on the parameters supplied */
/* to the release semaphore function. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* SMC_Release_Semaphore Actual release semaphore fct.*/
/* */
/* INPUTS */
/* */
/* semaphore_ptr Semaphore control block ptr */
/* */
/* OUTPUTS */
/* */
/* NU_INVALID_SEMAPHORE Invalid semaphore pointer */
/* */
/* 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 SMCE_Release_Semaphore(NU_SEMAPHORE *semaphore_ptr)
{
SM_SCB *semaphore; /* Semaphore control blk ptr */
STATUS status; /* Completion status */
/* Move input semaphore pointer into internal pointer. */
semaphore = (SM_SCB *) semaphore_ptr;
/* Determine if semaphore pointer is invalid. */
if (semaphore == NU_NULL)
/* Semaphore pointer is invalid, indicate in completion status. */
status = NU_INVALID_SEMAPHORE;
else if (semaphore -> sm_id != SM_SEMAPHORE_ID)
/* Semaphore pointer is invalid, indicate in completion status. */
status = NU_INVALID_SEMAPHORE;
else
{
/* Parameters are valid, call actual function. */
status = SMC_Release_Semaphore(semaphore_ptr);
}
/* Return the completion status. */
return(status);
}
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