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view gsm-fw/nucleus/smf.c @ 274:e3f17ff16915
gsm-fw: buildrel.sh script for building mokoffs-edit-kit release images
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Fri, 07 Feb 2014 08:32:25 +0000 |
parents | afceeeb2cba1 |
children |
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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 */ /* */ /* smf.c Nucleus PLUS 1.14 */ /* */ /* COMPONENT */ /* */ /* SM - Semaphore Management */ /* */ /* DESCRIPTION */ /* */ /* This file contains routines to obtain facts about the Semaphore */ /* Management component. */ /* */ /* DATA STRUCTURES */ /* */ /* None */ /* */ /* FUNCTIONS */ /* */ /* SMF_Established_Semaphores Number of created semaphores */ /* SMF_Semaphore_Pointers Build semaphore pointer list */ /* SMF_Semaphore_Information Retrieve semaphore info */ /* */ /* DEPENDENCIES */ /* */ /* cs_extr.h Common Service functions */ /* tc_extr.h Thread Control functions */ /* sm_extr.h Semaphore functions */ /* hi_extr.h History functions */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1994 Initial version of semaphore */ /* 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 "sm_extr.h" /* Semaphore functions */ #include "hi_extr.h" /* History functions */ /* Define external inner-component global data references. */ extern CS_NODE *SMD_Created_Semaphores_List; extern UNSIGNED SMD_Total_Semaphores; extern TC_PROTECT SMD_List_Protect; /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* SMF_Established_Semaphores */ /* */ /* DESCRIPTION */ /* */ /* This function returns the current number of established */ /* semaphores. Semaphores previously deleted are no longer */ /* considered established. */ /* */ /* CALLED BY */ /* */ /* Application */ /* */ /* CALLS */ /* */ /* [TCT_Check_Stack] Stack checking function */ /* */ /* INPUTS */ /* */ /* None */ /* */ /* OUTPUTS */ /* */ /* SMD_Total_Semaphores Number of established */ /* semaphores */ /* */ /* 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 SMF_Established_Semaphores(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 semaphores. */ return(SMD_Total_Semaphores); } /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* SMF_Semaphore_Pointers */ /* */ /* DESCRIPTION */ /* */ /* This function builds a list of semaphore pointers, starting at */ /* the specified location. The number of semaphore pointers */ /* placed in the list is equivalent to the total number of */ /* semaphores 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 semaphores 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 SMF_Semaphore_Pointers(NU_SEMAPHORE **pointer_list, UNSIGNED maximum_pointers) { CS_NODE *node_ptr; /* Pointer to each SMB */ 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 semaphores. */ TCT_Protect(&SMD_List_Protect); /* Loop until all semaphore pointers are in the list or until the maximum list size is reached. */ node_ptr = SMD_Created_Semaphores_List; while ((node_ptr) && (pointers < maximum_pointers)) { /* Place the node into the destination list. */ *pointer_list++ = (NU_SEMAPHORE *) 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 == SMD_Created_Semaphores_List) /* The list search is complete. */ node_ptr = NU_NULL; } /* Release protection against access to the list of created semaphores. */ TCT_Unprotect(); /* Return to user mode */ NU_USER_MODE(); /* Return the number of pointers in the list. */ return(pointers); } /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* SMF_Semaphore_Information */ /* */ /* DESCRIPTION */ /* */ /* This function returns information about the specified semaphore. */ /* However, if the supplied semaphore pointer is invalid, the */ /* function simply returns an error status. */ /* */ /* CALLED BY */ /* */ /* Application */ /* */ /* CALLS */ /* */ /* [TCT_Check_Stack] Stack checking function */ /* TCT_System_Protect Protect semaphore */ /* TCT_Unprotect Release protection */ /* */ /* INPUTS */ /* */ /* semaphore_ptr Pointer to the semaphore */ /* name Destination for the name */ /* current_count Destination for semaphore */ /* instance count */ /* 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 semaphore pointer */ /* is supplied */ /* NU_INVALID_SEMAPHORE If semaphore 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 SMF_Semaphore_Information(NU_SEMAPHORE *semaphore_ptr, CHAR *name, UNSIGNED *current_count, OPTION *suspend_type, UNSIGNED *tasks_waiting, NU_TASK **first_task) { SM_SCB *semaphore; /* Semaphore control blk ptr */ INT i; /* Working integer variable */ STATUS completion; /* Completion status */ NU_SUPERV_USER_VARIABLES /* Switch to supervisor mode */ NU_SUPERVISOR_MODE(); /* Move input semaphore pointer into internal pointer. */ semaphore = (SM_SCB *) semaphore_ptr; #ifdef NU_ENABLE_STACK_CHECK /* Call stack checking function to check for an overflow condition. */ TCT_Check_Stack(); #endif /* Determine if this semaphore id is valid. */ if ((semaphore != NU_NULL) && (semaphore -> sm_id == SM_SEMAPHORE_ID)) { /* Setup protection of the semaphore. */ TCT_System_Protect(); /* The semaphore pointer is valid. Reflect this in the completion status and fill in the actual information. */ completion = NU_SUCCESS; /* Copy the semaphore's name. */ for (i = 0; i < NU_MAX_NAME; i++) *name++ = semaphore -> sm_name[i]; /* Determine the suspension type. */ if (semaphore -> sm_fifo_suspend) *suspend_type = NU_FIFO; else *suspend_type = NU_PRIORITY; /* Return the current semaphore available instance count. */ *current_count = semaphore -> sm_semaphore_count; /* Retrieve the number of tasks waiting and the pointer to the first task waiting. */ *tasks_waiting = semaphore -> sm_tasks_waiting; if (semaphore -> sm_suspension_list) /* There is a task waiting. */ *first_task = (NU_TASK *) (semaphore -> sm_suspension_list) -> sm_suspended_task; else /* There are no tasks waiting. */ *first_task = NU_NULL; /* Release protection of the semaphore. */ TCT_Unprotect(); } else /* Indicate that the semaphore pointer is invalid. */ completion = NU_INVALID_SEMAPHORE; /* Return to user mode */ NU_USER_MODE(); /* Return the appropriate completion status. */ return(completion); }