FreeCalypso > hg > fc-selenite
diff src/nucleus/dmf.c @ 7:0f80e1e4dce4
src/nucleus: library C code import from FreeNucleus package
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sun, 15 Jul 2018 20:57:33 +0000 |
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| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/nucleus/dmf.c Sun Jul 15 20:57:33 2018 +0000 @@ -0,0 +1,384 @@ +/*************************************************************************/ +/* */ +/* 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 */ +/* */ +/* dmf.c Nucleus PLUS 1.14 */ +/* */ +/* COMPONENT */ +/* */ +/* DM - Dynamic Memory Management */ +/* */ +/* DESCRIPTION */ +/* */ +/* This file contains routines to obtain facts about the Dynamic */ +/* Memory Management component. */ +/* */ +/* DATA STRUCTURES */ +/* */ +/* None */ +/* */ +/* FUNCTIONS */ +/* */ +/* DMF_Established_Memory_Pools Number of dynamic pools */ +/* DMF_Memory_Pool_Pointers Build memory pool pointer */ +/* list */ +/* DMF_Memory_Pool_Information Retrieve memory pool info */ +/* */ +/* DEPENDENCIES */ +/* */ +/* cs_extr.h Common Service functions */ +/* tc_extr.h Thread Control functions */ +/* dm_extr.h Partition functions */ +/* hi_extr.h History functions */ +/* */ +/* HISTORY */ +/* */ +/* DATE REMARKS */ +/* */ +/* 03-01-1994 Initial version of partition 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 "dm_extr.h" /* Dynamic memory functions */ +#include "hi_extr.h" /* History functions */ + + +/* Define external inner-component global data references. */ + +extern CS_NODE *DMD_Created_Pools_List; +extern UNSIGNED DMD_Total_Pools; +extern TC_PROTECT DMD_List_Protect; + + + +/*************************************************************************/ +/* */ +/* FUNCTION */ +/* */ +/* DMF_Established_Memory_Pools */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function returns the current number of established */ +/* memory pools. Pools previously deleted are no longer */ +/* considered established. */ +/* */ +/* CALLED BY */ +/* */ +/* Application */ +/* */ +/* CALLS */ +/* */ +/* [TCT_Check_Stack] Stack checking function */ +/* */ +/* INPUTS */ +/* */ +/* None */ +/* */ +/* OUTPUTS */ +/* */ +/* DMD_Total_Pools Number of established */ +/* dynamic memory pools */ +/* */ +/* 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 DMF_Established_Memory_Pools(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 dynamic memory pools. */ + return(DMD_Total_Pools); +} + + +/*************************************************************************/ +/* */ +/* FUNCTION */ +/* */ +/* DMF_Memory_Pool_Pointers */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function builds a list of pool pointers, starting at */ +/* the specified location. The number of pool pointers */ +/* placed in the list is equivalent to the total number of */ +/* pools 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 memory pools */ +/* 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 DMF_Memory_Pool_Pointers(NU_MEMORY_POOL **pointer_list, + UNSIGNED maximum_pointers) +{ + +CS_NODE *node_ptr; /* Pointer to each PCB */ +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 memory pools. */ + TCT_Protect(&DMD_List_Protect); + + /* Loop until all pool pointers are in the list or until the maximum + list size is reached. */ + node_ptr = DMD_Created_Pools_List; + while ((node_ptr) && (pointers < maximum_pointers)) + { + + /* Place the node into the destination list. */ + *pointer_list++ = (NU_MEMORY_POOL *) 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 == DMD_Created_Pools_List) + + /* The list search is complete. */ + node_ptr = NU_NULL; + } + + /* Release protection of the list of created pools. */ + TCT_Unprotect(); + + /* Return to user mode */ + NU_USER_MODE(); + + /* Return the number of pointers in the list. */ + return(pointers); +} + + +/*************************************************************************/ +/* */ +/* FUNCTION */ +/* */ +/* DMF_Memory_Pool_Information */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function returns information about the specified memory */ +/* pool. However, if the supplied memory pool pointer is */ +/* invalid, the function simply returns an error status. */ +/* */ +/* CALLED BY */ +/* */ +/* Application */ +/* */ +/* CALLS */ +/* */ +/* [TCT_Check_Stack] Stack checking function */ +/* TCT_Protect Protect memory pool */ +/* TCT_Unprotect Release protection */ +/* */ +/* INPUTS */ +/* */ +/* pool_ptr Pointer to the memory pool */ +/* name Destination for the name */ +/* start_address Destination for the starting */ +/* memory address of the pool */ +/* pool_size Destination for the pool's */ +/* total size */ +/* min_allocation Destination for the minimum */ +/* block allocation size */ +/* available Destination for the available*/ +/* number of bytes in pool */ +/* suspend_type Destination for the type of */ +/* suspension */ +/* 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 pool pointer */ +/* is supplied */ +/* NU_INVALID_POOL If pool pointer 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 */ +/* 11-18-1996 Corrected SPR220. */ +/* */ +/*************************************************************************/ +STATUS DMF_Memory_Pool_Information(NU_MEMORY_POOL *pool_ptr, CHAR *name, + VOID **start_address, UNSIGNED *pool_size, + UNSIGNED *min_allocation, UNSIGNED *available, + OPTION *suspend_type, UNSIGNED *tasks_waiting, + NU_TASK **first_task) +{ + +DM_PCB *pool; /* Pool 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 pool pointer into internal pointer. */ + pool = (DM_PCB *) pool_ptr; + +#ifdef NU_ENABLE_STACK_CHECK + + /* Call stack checking function to check for an overflow condition. */ + TCT_Check_Stack(); + +#endif + + /* Determine if this memory pool id is valid. */ + if ((pool != NU_NULL) && (pool -> dm_id == DM_DYNAMIC_ID)) + { + + /* Setup protection of the memory pool. */ + TCT_Protect(&(pool -> dm_protect)); + + /* The memory pool pointer is valid. Reflect this in the completion + status and fill in the actual information. */ + completion = NU_SUCCESS; + + /* Copy the memory pool's name. */ + for (i = 0; i < NU_MAX_NAME; i++) + *name++ = pool -> dm_name[i]; + + /* Determine the suspension type. */ + if (pool -> dm_fifo_suspend) + *suspend_type = NU_FIFO; + else + *suspend_type = NU_PRIORITY; + + /* Retrieve information directly out of the control structure. */ + *start_address = pool -> dm_start_address; + *pool_size = pool -> dm_pool_size; + *min_allocation = pool -> dm_min_allocation; + *available = pool -> dm_available; + + /* Retrieve the number of tasks waiting and the pointer to the + first task waiting. */ + *tasks_waiting = pool -> dm_tasks_waiting; + if (pool -> dm_suspension_list) + + /* There is a task waiting. */ + *first_task = (NU_TASK *) + (pool -> dm_suspension_list) -> dm_suspended_task; + else + + /* There are no tasks waiting. */ + *first_task = NU_NULL; + + /* Release protection of the memory pool. */ + TCT_Unprotect(); + } + else + + /* Indicate that the memory pool pointer is invalid. */ + completion = NU_INVALID_POOL; + + /* Return to user mode */ + NU_USER_MODE(); + + /* Return the appropriate completion status. */ + return(completion); +} + + + +