diff nucleus/pif.c @ 0:75a11d740a02

initial import of gsm-fw from freecalypso-sw rev 1033:5ab737ac3ad7
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 09 Jun 2016 00:02:41 +0000
parents
children
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nucleus/pif.c	Thu Jun 09 00:02:41 2016 +0000
@@ -0,0 +1,393 @@
+/*************************************************************************/
+/*                                                                       */
+/*               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();
+
+#endif
+
+    /* Initialize the number of pointers returned.  */
+    pointers =  0;
+
+    /* Protect against access to the list of created pipes.  */
+    TCT_Protect(&PID_List_Protect);
+
+    /* Loop until all pipe pointers are in the list or until the maximum
+       list size is reached.  */
+    node_ptr =  PID_Created_Pipes_List;
+    while ((node_ptr) && (pointers < maximum_pointers))
+    {
+
+        /* Place the node into the destination list.  */
+        *pointer_list++ =  (NU_PIPE *) 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 == PID_Created_Pipes_List)
+
+            /* The list search is complete.  */
+            node_ptr =  NU_NULL;
+    }
+
+    /* Release protection against access to the list of created pipes.  */
+    TCT_Unprotect();
+
+    /* Return to user mode */
+    NU_USER_MODE();
+
+    /* Return the number of pointers in the list.  */
+    return(pointers);
+}
+
+
+/*************************************************************************/
+/*                                                                       */
+/* FUNCTION                                                              */
+/*                                                                       */
+/*      PIF_Pipe_Information                                             */
+/*                                                                       */
+/* DESCRIPTION                                                           */
+/*                                                                       */
+/*      This function returns information about the specified pipe.      */
+/*      However, if the supplied pipe pointer is invalid, the            */
+/*      function simply returns an error status.                         */
+/*                                                                       */
+/* CALLED BY                                                             */
+/*                                                                       */
+/*      Application                                                      */
+/*                                                                       */
+/* CALLS                                                                 */
+/*                                                                       */
+/*      [TCT_Check_Stack]                   Stack checking function      */
+/*      TCT_System_Protect                  Protect pipe                 */
+/*      TCT_Unprotect                       Release protection           */
+/*                                                                       */
+/* INPUTS                                                                */
+/*                                                                       */
+/*      pipe_ptr                            Pointer to the pipe          */
+/*      name                                Destination for the name     */
+/*      start_address                       Destination for the start    */
+/*                                            address of the pipe        */
+/*      pipe_size                           Destination for pipe size    */
+/*      available                           Destination for available    */
+/*                                            room in pipe               */
+/*      messages                            Destination for number of    */
+/*                                            messages piped             */
+/*      message_type                        Destination for message type */
+/*      message_size                        Destination for message size */
+/*      suspend_type                        Destination for suspension   */
+/*                                            type                       */
+/*      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 pipe pointer      */
+/*                                            is supplied                */
+/*      NU_INVALID_PIPE                     If pipe 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  PIF_Pipe_Information(NU_PIPE *pipe_ptr, CHAR *name,
+                  VOID **start_address, UNSIGNED *pipe_size,
+                  UNSIGNED *available, UNSIGNED *messages,
+                  OPTION *message_type, UNSIGNED *message_size,
+                  OPTION *suspend_type, UNSIGNED *tasks_waiting,
+                  NU_TASK **first_task)
+{
+
+PI_PCB         *pipe;                       /* Pipe 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 pipe pointer into internal pointer.  */
+    pipe =  (PI_PCB *) pipe_ptr;
+
+
+#ifdef  NU_ENABLE_STACK_CHECK
+
+    /* Call stack checking function to check for an overflow condition.  */
+    TCT_Check_Stack();
+
+#endif
+
+    /* Determine if this pipe id is valid.  */
+    if ((pipe != NU_NULL) && (pipe -> pi_id == PI_PIPE_ID))
+    {
+
+        /* Setup protection of the pipe.  */
+        TCT_System_Protect();
+
+        /* The pipe pointer is valid.  Reflect this in the completion
+           status and fill in the actual information.  */
+        completion =  NU_SUCCESS;
+
+        /* Copy the pipe's name.  */
+        for (i = 0; i < NU_MAX_NAME; i++)
+            *name++ =  pipe -> pi_name[i];
+
+        /* Determine the suspension type.  */
+        if (pipe -> pi_fifo_suspend)
+            *suspend_type =  NU_FIFO;
+        else
+            *suspend_type =  NU_PRIORITY;
+
+        /* Determine the message type.  */
+        if (pipe -> pi_fixed_size)
+            *message_type =  NU_FIXED_SIZE;
+        else
+            *message_type =  NU_VARIABLE_SIZE;
+
+        /* Get various information about the pipe.  */
+        *start_address =  (VOID *) pipe -> pi_start;
+        *pipe_size =      pipe -> pi_pipe_size;
+        *available =      pipe -> pi_available;
+        *messages =       pipe -> pi_messages;
+        *message_size =   pipe -> pi_message_size;
+
+        /* Retrieve the number of tasks waiting and the pointer to the
+           first task waiting.  */
+        *tasks_waiting =  pipe -> pi_tasks_waiting;
+        if (pipe -> pi_suspension_list)
+
+            /* There is a task waiting.  */
+            *first_task =  (NU_TASK *)
+                (pipe -> pi_suspension_list) -> pi_suspended_task;
+        else
+
+            /* There are no tasks waiting.  */
+            *first_task =  NU_NULL;
+
+        /* Release protection of the pipe.  */
+        TCT_Unprotect();
+    }
+    else
+
+        /* Indicate that the pipe pointer is invalid.   */
+        completion =  NU_INVALID_PIPE;
+
+    /* Return to user mode */
+    NU_USER_MODE();
+
+    /* Return the appropriate completion status.  */
+    return(completion);
+}
+
+
+
+
+
+