?? mbc.c
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/*************************************************************************/
/* */
/* Copyright Mentor Graphics Corporation 2002 */
/* All Rights Reserved. */
/* */
/* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */
/* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */
/* SUBJECT TO LICENSE TERMS. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* FILE NAME VERSION */
/* */
/* mbc.c Nucleus PLUS 1.14 */
/* */
/* COMPONENT */
/* */
/* MB - Mailbox Management */
/* */
/* DESCRIPTION */
/* */
/* This file contains the core routines for the Mailbox management */
/* component. */
/* */
/* DATA STRUCTURES */
/* */
/* None */
/* */
/* FUNCTIONS */
/* */
/* MBC_Create_Mailbox Create a mailbox */
/* MBC_Delete_Mailbox Delete a mailbox */
/* MBC_Send_To_Mailbox Send a mailbox message */
/* MBC_Receive_From_Mailbox Receive a mailbox message */
/* MBC_Cleanup Cleanup on timeout or a */
/* terminate condition */
/* */
/* DEPENDENCIES */
/* */
/* cs_extr.h Common Service functions */
/* tc_extr.h Thread Control functions */
/* mb_extr.h Mailbox functions */
/* hi_extr.h History functions */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 08-09-1993 Corrected pointer retrieval */
/* loop, resulting in version 1.0a */
/* 08-09-1993 Verified version 1.0a */
/* 03-01-1994 Moved non-core functions into */
/* supplemental files, changed */
/* function interfaces to match */
/* those in prototype, added */
/* register options, changed */
/* protection logic to reduce */
/* overhead, resulting in */
/* version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* 04-17-1996 updated to version 1.2 */
/* 03-24-1998 Released version 1.3 */
/* 03-26-1999 Released 1.11m (new release */
/* numbering scheme) */
/* 04-17-2002 Released version 1.13m */
/* 11-07-2002 Released version 1.14 */
/*************************************************************************/
#define NU_SOURCE_FILE
#include "cs_extr.h" /* Common service functions */
#include "tc_extr.h" /* Thread control functions */
#include "mb_extr.h" /* Mailbox functions */
#include "hi_extr.h" /* History functions */
#include "profiler.h" /* ProView interface */
/* Define external inner-component global data references. */
extern CS_NODE *MBD_Created_Mailboxes_List;
extern UNSIGNED MBD_Total_Mailboxes;
extern TC_PROTECT MBD_List_Protect;
/* Define internal component function prototypes. */
VOID MBC_Cleanup(VOID *information);
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* MBC_Create_Mailbox */
/* */
/* DESCRIPTION */
/* */
/* This function creates a mailbox and then places it on the list */
/* of created mailboxes. */
/* */
/* CALLED BY */
/* */
/* Application */
/* MBCE_Create_Mailbox Error checking shell */
/* */
/* CALLS */
/* */
/* CSC_Place_On_List Add node to linked-list */
/* [HIC_Make_History_Entry] Make entry in history log */
/* [TCT_Check_Stack] Stack checking function */
/* TCT_Protect Data structure protect */
/* TCT_Unprotect Un-protect data structure */
/* */
/* INPUTS */
/* */
/* mailbox_ptr Mailbox control block pointer*/
/* name Mailbox name */
/* suspend_type Suspension type */
/* */
/* OUTPUTS */
/* */
/* NU_SUCCESS */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 03-01-1994 Changed function interface to */
/* match the prototype, added */
/* register variable logic, */
/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* */
/*************************************************************************/
STATUS MBC_Create_Mailbox(NU_MAILBOX *mailbox_ptr, CHAR *name,
OPTION suspend_type)
{
R1 MB_MCB *mailbox; /* Mailbox control block ptr */
INT i; /* Working index variable */
NU_SUPERV_USER_VARIABLES
/* Switch to supervisor mode */
NU_SUPERVISOR_MODE();
/* Move input mailbox pointer into internal pointer. */
mailbox = (MB_MCB *) mailbox_ptr;
#ifdef NU_ENABLE_STACK_CHECK
/* Call stack checking function to check for an overflow condition. */
TCT_Check_Stack();
#endif
#ifdef NU_ENABLE_HISTORY
/* Make an entry that corresponds to this function in the system history
log. */
HIC_Make_History_Entry(NU_CREATE_MAILBOX_ID, (UNSIGNED) mailbox,
(UNSIGNED) name, (UNSIGNED) suspend_type);
#endif
/* First, clear the mailbox ID just in case it is an old Mailbox
Control Block. */
mailbox -> mb_id = 0;
/* Fill in the mailbox name. */
for (i = 0; i < NU_MAX_NAME; i++)
mailbox -> mb_name[i] = name[i];
/* Clear the message present flag- initial it to "no message present." */
mailbox -> mb_message_present = NU_FALSE;
/* Setup the mailbox suspension type. */
if (suspend_type == NU_FIFO)
/* FIFO suspension is selected, setup the flag accordingly. */
mailbox -> mb_fifo_suspend = NU_TRUE;
else
/* Priority suspension is selected. */
mailbox -> mb_fifo_suspend = NU_FALSE;
/* Clear the suspension list pointer. */
mailbox -> mb_suspension_list = NU_NULL;
/* Clear the number of tasks waiting on the mailbox counter. */
mailbox -> mb_tasks_waiting = 0;
/* Initialize link pointers. */
mailbox -> mb_created.cs_previous = NU_NULL;
mailbox -> mb_created.cs_next = NU_NULL;
/* Protect against access to the list of created mailboxes. */
TCT_Protect(&MBD_List_Protect);
/* At this point the mailbox is completely built. The ID can now be
set and it can be linked into the created mailbox list. */
mailbox -> mb_id = MB_MAILBOX_ID;
/* Link the mailbox into the list of created mailboxes and increment the
total number of mailboxes in the system. */
CSC_Place_On_List(&MBD_Created_Mailboxes_List, &(mailbox -> mb_created));
MBD_Total_Mailboxes++;
#ifdef INCLUDE_PROVIEW
_RTProf_DumpMailBox(RT_PROF_CREATE_MAILBOX,mailbox,RT_PROF_OK);
#endif /* INCLUDE_PROVIEW */
/* Release protection against access to the list of created mailboxes. */
TCT_Unprotect();
/* Return to user mode */
NU_USER_MODE();
/* Return successful completion. */
return(NU_SUCCESS);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* MBC_Delete_Mailbox */
/* */
/* DESCRIPTION */
/* */
/* This function deletes a mailbox and removes it from the list of */
/* created mailboxes. All tasks suspended on the mailbox are */
/* resumed. Note that this function does not free the memory */
/* associated with the mailbox control block. */
/* */
/* CALLED BY */
/* */
/* Application */
/* MBCE_Delete_Mailbox Error checking shell */
/* */
/* CALLS */
/* */
/* CSC_Remove_From_List Remove node from list */
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