?? pif.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 */
/* */
/* pif.c Nucleus PLUS 1.14 */
/* */
/* COMPONENT */
/* */
/* PI - Pipe Management */
/* */
/* DESCRIPTION */
/* */
/* This file contains routines to obtain facts about the Pipe */
/* management component. */
/* */
/* DATA STRUCTURES */
/* */
/* None */
/* */
/* FUNCTIONS */
/* */
/* PIF_Established_Pipes Number of created pipes */
/* PIF_Pipe_Information Retrieve pipe information */
/* PIF_Pipe_Pointers Build pipe pointer list */
/* */
/* DEPENDENCIES */
/* */
/* cs_extr.h Common Service functions */
/* tc_extr.h Thread Control functions */
/* pi_extr.h Pipe functions */
/* hi_extr.h History functions */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1994 Initial version of pipe 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 "pi_extr.h" /* Pipe functions */
#include "hi_extr.h" /* History functions */
/* Define external inner-component global data references. */
extern CS_NODE *PID_Created_Pipes_List;
extern UNSIGNED PID_Total_Pipes;
extern TC_PROTECT PID_List_Protect;
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* PIF_Established_Pipes */
/* */
/* DESCRIPTION */
/* */
/* This function returns the current number of established */
/* pipes. Pipes previously deleted are no longer considered */
/* established. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* [TCT_Check_Stack] Stack checking function */
/* */
/* INPUTS */
/* */
/* None */
/* */
/* OUTPUTS */
/* */
/* PID_Total_Pipes Number of established */
/* pipes */
/* */
/* 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 */
/* */
/*************************************************************************/
UNSIGNED PIF_Established_Pipes(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 pipes. */
return(PID_Total_Pipes);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* PIF_Pipe_Pointers */
/* */
/* DESCRIPTION */
/* */
/* This function builds a list of pipe pointers, starting at the */
/* specified location. The number of pipe pointers placed in the */
/* list is equivalent to the total number of pipes 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 pipe pointers */
/* 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 Modified function interface, */
/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* */
/*************************************************************************/
UNSIGNED PIF_Pipe_Pointers(NU_PIPE **pointer_list,UNSIGNED maximum_pointers)
{
CS_NODE *node_ptr; /* Pointer to each QCB */
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();
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