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);
+}
+
+
+
+