FreeCalypso > hg > fc-tourmaline
diff src/nucleus/mbf.c @ 0:4e78acac3d88
src/{condat,cs,gpf,nucleus}: import from Selenite
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Fri, 16 Oct 2020 06:23:26 +0000 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/nucleus/mbf.c Fri Oct 16 06:23:26 2020 +0000 @@ -0,0 +1,374 @@ +/*************************************************************************/ +/* */ +/* 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 */ +/* */ +/* mbf.c Nucleus PLUS 1.14 */ +/* */ +/* COMPONENT */ +/* */ +/* MB - Mailbox Management */ +/* */ +/* DESCRIPTION */ +/* */ +/* This file contains routines to obtain facts about the Mailbox */ +/* management component. */ +/* */ +/* DATA STRUCTURES */ +/* */ +/* None */ +/* */ +/* FUNCTIONS */ +/* */ +/* MBF_Established_Mailboxes Number of created mailboxes */ +/* MBF_Mailbox_Pointers Build mailbox pointer list */ +/* MBF_Mailbox_Information Retrieve mailbox information */ +/* */ +/* 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 */ +/* */ +/* 03-01-1994 Initial version of mailbox fact */ +/* service file, version 1.1 */ +/* */ +/* 03-18-1994 Verified version 1.1 */ +/* 04-17-1996 updated to version 1.2 */ +/* 11-18-1996 Protected Informational service */ +/* from NULL Control Block pointers */ +/* creating 1.2a. (SPR220) */ +/* 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 */ + + +/* 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 */ +/* */ +/* MBF_Established_Mailboxes */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function returns the current number of established */ +/* mailboxes. Mailboxes previously deleted are no longer */ +/* considered established. */ +/* */ +/* CALLED BY */ +/* */ +/* Application */ +/* */ +/* CALLS */ +/* */ +/* [TCT_Check_Stack] Stack checking function */ +/* */ +/* INPUTS */ +/* */ +/* None */ +/* */ +/* OUTPUTS */ +/* */ +/* MBD_Total_Mailboxes Number of established */ +/* mailboxes */ +/* */ +/* HISTORY */ +/* */ +/* DATE REMARKS */ +/* */ +/* 03-01-1993 Created initial version 1.0 */ +/* 04-19-1993 Verified version 1.0 */ +/* */ +/*************************************************************************/ +UNSIGNED MBF_Established_Mailboxes(VOID) +{ + + +#ifdef NU_ENABLE_STACK_CHECK + + /* Call stack checking function to check for an overflow condition. */ + TCT_Check_Stack(); + +#endif + + /* Return the number of established mailboxes. */ + return(MBD_Total_Mailboxes); +} + + +/*************************************************************************/ +/* */ +/* FUNCTION */ +/* */ +/* MBF_Mailbox_Pointers */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function builds a list of mailbox pointers, starting at the */ +/* specified location. The number of mailbox pointers placed in */ +/* the list is equivalent to the total number of mailboxes or the */ +/* maximum number of pointers specified in the call. */ +/* */ +/* CALLED BY */ +/* */ +/* Application */ +/* */ +/* CALLS */ +/* */ +/* [TCT_Check_Stack] Stack checking function */ +/* TCT_Protect Protect created list */ +/* TCT_Unprotect Release protection */ +/* */ +/* INPUTS */ +/* */ +/* pointer_list Pointer to the list area */ +/* maximum_pointers Maximum number of pointers */ +/* */ +/* OUTPUTS */ +/* */ +/* pointers Number of mailboxes placed */ +/* in the list */ +/* 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 Changed function interface to */ +/* match the prototype, */ +/* resulting in version 1.1 */ +/* */ +/* 03-18-1994 Verified version 1.1 */ +/* */ +/*************************************************************************/ +UNSIGNED MBF_Mailbox_Pointers(NU_MAILBOX **pointer_list, + UNSIGNED maximum_pointers) +{ +CS_NODE *node_ptr; /* Pointer to each MCB */ +UNSIGNED pointers; /* Number of pointers in list*/ +NU_SUPERV_USER_VARIABLES + + /* Switch to supervisor mode */ + NU_SUPERVISOR_MODE(); + +#ifdef NU_ENABLE_STACK_CHECK + + /* Call stack checking function to check for an overflow condition. */ + TCT_Check_Stack(); + +#endif + + /* Initialize the number of pointers returned. */ + pointers = 0; + + /* Protect against access to the list of created mailboxes. */ + TCT_Protect(&MBD_List_Protect); + + /* Loop until all mailbox pointers are in the list or until the maximum + list size is reached. */ + node_ptr = MBD_Created_Mailboxes_List; + while ((node_ptr) && (pointers < maximum_pointers)) + { + + /* Place the node into the destination list. */ + *pointer_list++ = (NU_MAILBOX *) node_ptr; + + /* Increment the pointers variable. */ + pointers++; + + /* Position the node pointer to the next node. */ + node_ptr = node_ptr -> cs_next; + + /* Determine if the pointer is at the head of the list. */ + if (node_ptr == MBD_Created_Mailboxes_List) + + /* The list search is complete. */ + node_ptr = NU_NULL; + } + + /* Release protection against access to the list of created mailboxes. */ + TCT_Unprotect(); + + /* Return to user mode */ + NU_USER_MODE(); + + /* Return the number of pointers in the list. */ + return(pointers); +} + + +/*************************************************************************/ +/* */ +/* FUNCTION */ +/* */ +/* MBF_Mailbox_Information */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function returns information about the specified mailbox. */ +/* However, if the supplied mailbox pointer is invalid, the */ +/* function simply returns an error status. */ +/* */ +/* CALLED BY */ +/* */ +/* Application */ +/* */ +/* CALLS */ +/* */ +/* [TCT_Check_Stack] Stack checking function */ +/* TCT_System_Protect Protect mailbox */ +/* TCT_Unprotect Release protection */ +/* */ +/* INPUTS */ +/* */ +/* mailbox_ptr Pointer to the mailbox */ +/* name Destination for the name */ +/* suspend_type Destination for the type of */ +/* suspension */ +/* message_present Destination for the message */ +/* present flag */ +/* tasks_waiting Destination for the tasks */ +/* waiting count */ +/* first_task Destination for the pointer */ +/* to the first task waiting */ +/* */ +/* OUTPUTS */ +/* */ +/* NU_SUCCESS If a valid mailbox pointer */ +/* is supplied */ +/* NU_INVALID_MAILBOX If mailbox pointer invalid */ +/* */ +/* 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, */ +/* resulting in version 1.1 */ +/* */ +/* 03-18-1994 Verified version 1.1 */ +/* 11-18-1996 Corrected SPR220. */ +/* */ +/*************************************************************************/ +STATUS MBF_Mailbox_Information(NU_MAILBOX *mailbox_ptr, CHAR *name, + OPTION *suspend_type, DATA_ELEMENT *message_present, + UNSIGNED *tasks_waiting, NU_TASK **first_task) +{ + +MB_MCB *mailbox; /* Mailbox control block ptr */ +int i; /* Working integer variable */ +STATUS completion; /* Completion status */ +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 + + /* Determine if this mailbox id is valid. */ + if ((mailbox != NU_NULL) && (mailbox -> mb_id == MB_MAILBOX_ID)) + { + + /* Setup protection of the mailbox. */ + TCT_System_Protect(); + + /* The mailbox pointer is valid. Reflect this in the completion + status and fill in the actual information. */ + completion = NU_SUCCESS; + + /* Copy the mailbox's name. */ + for (i = 0; i < NU_MAX_NAME; i++) + *name++ = mailbox -> mb_name[i]; + + /* Determine the suspension type. */ + if (mailbox -> mb_fifo_suspend) + *suspend_type = NU_FIFO; + else + *suspend_type = NU_PRIORITY; + + /* Indicate whether or not there is a message in the mailbox. */ + *message_present = mailbox -> mb_message_present; + + /* Retrieve the number of tasks waiting and the pointer to the + first task waiting. */ + *tasks_waiting = mailbox -> mb_tasks_waiting; + if (mailbox -> mb_suspension_list) + + /* There is a task waiting. */ + *first_task = (NU_TASK *) + (mailbox -> mb_suspension_list) -> mb_suspended_task; + else + + /* There are no tasks waiting. */ + *first_task = NU_NULL; + + /* Release protection. */ + TCT_Unprotect(); + } + else + + /* Indicate that the mailbox pointer is invalid. */ + completion = NU_INVALID_MAILBOX; + + /* Return to user mode */ + NU_USER_MODE(); + + /* Return the appropriate completion status. */ + return(completion); +} + + + + +