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cfe_es_apps.c
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cfe_es_apps.c
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/*
** GSC-18128-1, "Core Flight Executive Version 6.7"
**
** Copyright (c) 2006-2019 United States Government as represented by
** the Administrator of the National Aeronautics and Space Administration.
** All Rights Reserved.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http:https://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
/*
** File:
** cfe_es_apps.c
**
** Purpose:
** This file contains functions for starting cFE applications from a filesystem.
**
** References:
** Flight Software Branch C Coding Standard Version 1.0a
** cFE Flight Software Application Developers Guide
**
** Notes:
**
*/
/*
** Includes
*/
#include "private/cfe_private.h"
#include "cfe_es.h"
#include "cfe_psp.h"
#include "cfe_es_global.h"
#include "cfe_es_task.h"
#include "cfe_es_apps.h"
#include "cfe_es_log.h"
#include <stdio.h>
#include <string.h> /* memset() */
#include <fcntl.h>
/*
** Defines
*/
#define ES_START_BUFF_SIZE 128
/*
**
** Global Variables
**
*/
/*
****************************************************************************
** Functions
***************************************************************************
*/
/*
** Name:
** CFE_ES_StartApplications
**
** Purpose:
** This routine loads/starts cFE applications.
**
*/
void CFE_ES_StartApplications(uint32 ResetType, const char *StartFilePath )
{
char ES_AppLoadBuffer[ES_START_BUFF_SIZE]; /* A buffer of for a line in a file */
const char *TokenList[CFE_ES_STARTSCRIPT_MAX_TOKENS_PER_LINE];
uint32 NumTokens;
uint32 BuffLen = 0; /* Length of the current buffer */
osal_id_t AppFile;
int32 Status;
char c;
bool LineTooLong = false;
bool FileOpened = false;
/*
** Get the ES startup script filename.
** If this is a Processor Reset, try to open the file in the volatile disk first.
*/
if ( ResetType == CFE_PSP_RST_TYPE_PROCESSOR )
{
/*
** Open the file in the volatile disk.
*/
Status = OS_OpenCreate(&AppFile, CFE_PLATFORM_ES_VOLATILE_STARTUP_FILE, OS_FILE_FLAG_NONE, OS_READ_ONLY);
if ( Status >= 0 )
{
CFE_ES_WriteToSysLog ("ES Startup: Opened ES App Startup file: %s\n",
CFE_PLATFORM_ES_VOLATILE_STARTUP_FILE);
FileOpened = true;
}
else
{
CFE_ES_WriteToSysLog ("ES Startup: Cannot Open Volatile Startup file, Trying Nonvolatile.\n");
FileOpened = false;
}
} /* end if */
/*
** This if block covers two cases: A Power on reset, and a Processor reset when
** the startup file on the volatile file system could not be opened.
*/
if ( FileOpened == false )
{
/*
** Try to Open the file passed in to the cFE start.
*/
Status = OS_OpenCreate(&AppFile, StartFilePath, OS_FILE_FLAG_NONE, OS_READ_ONLY);
if ( Status >= 0 )
{
CFE_ES_WriteToSysLog ("ES Startup: Opened ES App Startup file: %s\n",StartFilePath);
FileOpened = true;
}
else
{
CFE_ES_WriteToSysLog ("ES Startup: Error, Can't Open ES App Startup file: %s EC = 0x%08X\n",
StartFilePath, (unsigned int)Status );
FileOpened = false;
}
}
/*
** If the file is opened in either the Nonvolatile or the Volatile disk, process it.
*/
if ( FileOpened == true)
{
memset(ES_AppLoadBuffer,0x0,ES_START_BUFF_SIZE);
BuffLen = 0;
NumTokens = 0;
TokenList[0] = ES_AppLoadBuffer;
/*
** Parse the lines from the file. If it has an error
** or reaches EOF, then abort the loop.
*/
while(1)
{
Status = OS_read(AppFile, &c, 1);
if ( Status < 0 )
{
CFE_ES_WriteToSysLog ("ES Startup: Error Reading Startup file. EC = 0x%08X\n",(unsigned int)Status);
break;
}
else if ( Status == 0 )
{
/*
** EOF Reached
*/
break;
}
else if(c != '!')
{
if ( c <= ' ')
{
/*
** Skip all white space in the file
*/
;
}
else if ( c == ',' )
{
/*
** replace the field delimiter with a null
** This is used to separate the tokens
*/
if ( BuffLen < ES_START_BUFF_SIZE )
{
ES_AppLoadBuffer[BuffLen] = 0;
}
else
{
LineTooLong = true;
}
BuffLen++;
if ( NumTokens < (CFE_ES_STARTSCRIPT_MAX_TOKENS_PER_LINE-1))
{
/*
* NOTE: pointer never deferenced unless "LineTooLong" is false.
*/
++NumTokens;
TokenList[NumTokens] = &ES_AppLoadBuffer[BuffLen];
}
}
else if ( c != ';' )
{
/*
** Regular data gets copied in
*/
if ( BuffLen < ES_START_BUFF_SIZE )
{
ES_AppLoadBuffer[BuffLen] = c;
}
else
{
LineTooLong = true;
}
BuffLen++;
}
else
{
if ( LineTooLong == true )
{
/*
** The was too big for the buffer
*/
CFE_ES_WriteToSysLog ("ES Startup: ES Startup File Line is too long: %u bytes.\n",(unsigned int)BuffLen);
LineTooLong = false;
}
else
{
/*
** Send the line to the file parser
** Ensure termination of the last token and send it along
*/
ES_AppLoadBuffer[BuffLen] = 0;
CFE_ES_ParseFileEntry(TokenList, 1 + NumTokens);
}
BuffLen = 0;
NumTokens = 0;
}
}
else
{
/*
** break when EOF character '!' is reached
*/
break;
}
}
/*
** close the file
*/
OS_close(AppFile);
}
}
/*
**---------------------------------------------------------------------------------------
** Name: CFE_ES_ParseFileEntry
**
** Purpose: This function parses the startup file line for an individual
** cFE application.
**---------------------------------------------------------------------------------------
*/
int32 CFE_ES_ParseFileEntry(const char **TokenList, uint32 NumTokens)
{
const char *FileName;
const char *AppName;
const char *EntryPoint;
const char *EntryType;
unsigned int Priority;
unsigned int StackSize;
unsigned int ExceptionAction;
CFE_ES_ResourceID_t ApplicationId;
int32 CreateStatus = CFE_ES_ERR_APP_CREATE;
/*
** Check to see if the correct number of items were parsed
*/
if ( NumTokens < 8 )
{
CFE_ES_WriteToSysLog("ES Startup: Invalid ES Startup file entry: %u\n",(unsigned int)NumTokens);
return (CreateStatus);
}
EntryType = TokenList[0];
FileName = TokenList[1];
EntryPoint = TokenList[2];
AppName = TokenList[3];
/*
* NOTE: In previous CFE versions the sscanf() function was used to convert
* these string values into integers. This approach of using the pre-tokenized strings
* and strtoul() is safer but the side effect is that it will also be more "permissive" in
* what is accepted vs. rejected by this function.
*
* For instance if the startup script contains "123xyz", this will be converted to the value
* 123 instead of triggering a validation failure as it would have in CFE <= 6.5.0.
*
* This permissive parsing should not be relied upon, as it may become more strict again in
* future CFE revisions.
*/
Priority = strtoul(TokenList[4], NULL, 0);
StackSize = strtoul(TokenList[5], NULL, 0);
ExceptionAction = strtoul(TokenList[7], NULL, 0);
if(strcmp(EntryType,"CFE_APP")==0)
{
CFE_ES_WriteToSysLog("ES Startup: Loading file: %s, APP: %s\n",
FileName, AppName);
/*
** Validate Some parameters
** Exception action should be 0 ( Restart App ) or
** 1 ( Processor reset ). If it's non-zero, assume it means
** reset CPU.
*/
if ( ExceptionAction > CFE_ES_ExceptionAction_RESTART_APP )
ExceptionAction = CFE_ES_ExceptionAction_PROC_RESTART;
/*
** Now create the application
*/
CreateStatus = CFE_ES_AppCreate(&ApplicationId, FileName,
EntryPoint, AppName, (uint32) Priority,
(uint32) StackSize, (uint32) ExceptionAction );
}
else if(strcmp(EntryType,"CFE_LIB")==0)
{
CFE_ES_WriteToSysLog("ES Startup: Loading shared library: %s\n",FileName);
/*
** Now load the library
*/
CreateStatus = CFE_ES_LoadLibrary(&ApplicationId, FileName,
EntryPoint, AppName);
}
else
{
CFE_ES_WriteToSysLog("ES Startup: Unexpected EntryType %s in startup file.\n",EntryType);
}
return (CreateStatus);
}
/*
**---------------------------------------------------------------------------------------
** Name: ES_AppCreate
**
** Purpose: This function loads and creates a cFE Application.
** This function can be called from the ES startup code when it
** loads the cFE Applications from the disk using the startup script, or it
** can be called when the ES Start Application command is executed.
**
**---------------------------------------------------------------------------------------
*/
int32 CFE_ES_AppCreate(CFE_ES_ResourceID_t *ApplicationIdPtr,
const char *FileName,
const void *EntryPointData,
const char *AppName,
uint32 Priority,
uint32 StackSize,
uint32 ExceptionAction)
{
cpuaddr StartAddr;
int32 ReturnCode;
uint32 i;
bool AppSlotFound;
osal_id_t ModuleId;
osal_id_t MainTaskId;
CFE_ES_AppRecord_t *AppRecPtr;
CFE_ES_TaskRecord_t *TaskRecPtr;
/*
* The FileName must not be NULL
*/
if (FileName == NULL)
{
return CFE_ES_ERR_APP_CREATE;
}
/*
** Allocate an ES_AppTable entry
*/
CFE_ES_LockSharedData(__func__,__LINE__);
AppSlotFound = false;
AppRecPtr = CFE_ES_Global.AppTable;
for ( i = 0; i < CFE_PLATFORM_ES_MAX_APPLICATIONS; i++ )
{
if ( !CFE_ES_AppRecordIsUsed(AppRecPtr) )
{
AppSlotFound = true;
memset ( AppRecPtr, 0, sizeof(CFE_ES_AppRecord_t));
/* set state EARLY_INIT for OS_TaskCreate below (indicates record is in use) */
CFE_ES_AppRecordSetUsed(AppRecPtr, CFE_ES_ResourceID_FromInteger(i + CFE_ES_APPID_BASE));
break;
}
++AppRecPtr;
}
CFE_ES_UnlockSharedData(__func__,__LINE__);
/*
** If a slot was found, create the application
*/
if ( AppSlotFound == true)
{
/*
** Load the module
*/
ReturnCode = OS_ModuleLoad ( &ModuleId, AppName, FileName );
/*
** If the Load was OK, then lookup the address of the entry point
*/
if ( ReturnCode == OS_SUCCESS )
{
ReturnCode = OS_SymbolLookup( &StartAddr, (const char*)EntryPointData );
if ( ReturnCode != OS_SUCCESS )
{
CFE_ES_WriteToSysLog("ES Startup: Could not find symbol:%s. EC = 0x%08X\n",
(const char*)EntryPointData, (unsigned int)ReturnCode);
CFE_ES_LockSharedData(__func__,__LINE__);
CFE_ES_AppRecordSetFree(AppRecPtr); /* Release slot */
CFE_ES_UnlockSharedData(__func__,__LINE__);
/* Unload the module from memory, so that it does not consume resources */
ReturnCode = OS_ModuleUnload(ModuleId);
if ( ReturnCode != OS_SUCCESS ) /* There's not much we can do except notify */
{
CFE_ES_WriteToSysLog("ES Startup: Failed to unload APP: %s. EC = 0x%08X\n",
AppName, (unsigned int)ReturnCode);
}
return(CFE_ES_ERR_APP_CREATE);
}
}
else /* load not successful */
{
CFE_ES_WriteToSysLog("ES Startup: Could not load cFE application file:%s. EC = 0x%08X\n",
FileName, (unsigned int)ReturnCode);
CFE_ES_LockSharedData(__func__,__LINE__);
CFE_ES_AppRecordSetFree(AppRecPtr); /* Release slot */
CFE_ES_UnlockSharedData(__func__,__LINE__);
return(CFE_ES_ERR_APP_CREATE);
}
/*
** If the EntryPoint symbol was found, then start creating the App
*/
CFE_ES_LockSharedData(__func__,__LINE__);
/*
** Allocate and populate the ES_AppTable entry
*/
AppRecPtr->Type = CFE_ES_AppType_EXTERNAL;
/*
** Fill out the parameters in the AppStartParams sub-structure
*/
strncpy((char *)AppRecPtr->StartParams.Name, AppName, OS_MAX_API_NAME);
AppRecPtr->StartParams.Name[OS_MAX_API_NAME - 1] = '\0';
strncpy((char *)AppRecPtr->StartParams.EntryPoint, (const char *)EntryPointData, OS_MAX_API_NAME);
AppRecPtr->StartParams.EntryPoint[OS_MAX_API_NAME - 1] = '\0';
strncpy((char *)AppRecPtr->StartParams.FileName, FileName, OS_MAX_PATH_LEN);
AppRecPtr->StartParams.FileName[OS_MAX_PATH_LEN - 1] = '\0';
AppRecPtr->StartParams.StackSize = StackSize;
AppRecPtr->StartParams.StartAddress = StartAddr;
AppRecPtr->StartParams.ModuleId = ModuleId;
AppRecPtr->StartParams.ExceptionAction = ExceptionAction;
AppRecPtr->StartParams.Priority = Priority;
/*
** Fill out the Task Info
*/
strncpy((char *)AppRecPtr->TaskInfo.MainTaskName, AppName, OS_MAX_API_NAME);
AppRecPtr->TaskInfo.MainTaskName[OS_MAX_API_NAME - 1] = '\0';
/*
** Fill out the Task State info
*/
AppRecPtr->ControlReq.AppControlRequest = CFE_ES_RunStatus_APP_RUN;
AppRecPtr->ControlReq.AppTimerMsec = 0;
/*
** Create the primary task for the newly loaded task
*/
ReturnCode = OS_TaskCreate(&MainTaskId, /* task id */
AppName, /* task name */
(osal_task_entry)StartAddr, /* task function pointer */
NULL, /* stack pointer */
StackSize, /* stack size */
Priority, /* task priority */
OS_FP_ENABLED); /* task options */
if(ReturnCode != OS_SUCCESS)
{
CFE_ES_SysLogWrite_Unsync("ES Startup: AppCreate Error: TaskCreate %s Failed. EC = 0x%08X!\n",
AppName,(unsigned int)ReturnCode);
CFE_ES_AppRecordSetFree(AppRecPtr); /* Release slot */
CFE_ES_UnlockSharedData(__func__,__LINE__);
return(CFE_ES_ERR_APP_CREATE);
}
else
{
/*
** Record the ES_TaskTable entry
*/
AppRecPtr->TaskInfo.MainTaskId = CFE_ES_ResourceID_FromOSAL(MainTaskId);
TaskRecPtr = CFE_ES_LocateTaskRecordByID(AppRecPtr->TaskInfo.MainTaskId);
if ( CFE_ES_TaskRecordIsUsed(TaskRecPtr) )
{
CFE_ES_SysLogWrite_Unsync("ES Startup: Error: ES_TaskTable slot in use at task creation!\n");
}
CFE_ES_TaskRecordSetUsed(TaskRecPtr,AppRecPtr->TaskInfo.MainTaskId);
TaskRecPtr->AppId = CFE_ES_AppRecordGetID(AppRecPtr);
strncpy((char *)TaskRecPtr->TaskName,
(char *)AppRecPtr->TaskInfo.MainTaskName,OS_MAX_API_NAME );
TaskRecPtr->TaskName[OS_MAX_API_NAME - 1]='\0';
CFE_ES_SysLogWrite_Unsync("ES Startup: %s loaded and created\n", AppName);
*ApplicationIdPtr = CFE_ES_AppRecordGetID(AppRecPtr);
/*
** Increment the registered App and Registered External Task variables.
*/
CFE_ES_Global.RegisteredTasks++;
CFE_ES_Global.RegisteredExternalApps++;
CFE_ES_UnlockSharedData(__func__,__LINE__);
return(CFE_SUCCESS);
} /* End If OS_TaskCreate */
}
else /* appSlot not found */
{
CFE_ES_WriteToSysLog("ES Startup: No free application slots available\n");
return(CFE_ES_ERR_APP_CREATE);
}
} /* End Function */
/*
**---------------------------------------------------------------------------------------
** Name: CFE_ES_LoadLibrary
**
** Purpose: This function loads and initializes a cFE Shared Library.
**
**---------------------------------------------------------------------------------------
*/
int32 CFE_ES_LoadLibrary(CFE_ES_ResourceID_t *LibraryIdPtr,
const char *FileName,
const void *EntryPointData,
const char *LibName)
{
CFE_ES_LibraryEntryFuncPtr_t FunctionPointer;
CFE_ES_LibRecord_t * LibSlotPtr;
size_t StringLength;
int32 Status;
uint32 LibIndex;
CFE_ES_ResourceID_t PendingLibId;
osal_id_t ModuleId;
bool IsModuleLoaded;
/*
* First, should verify that the supplied "LibName" fits within the internal limit
* (currently sized to OS_MAX_API_NAME, but not assuming that will always be)
*/
StringLength = strlen(LibName);
if (StringLength >= sizeof(LibSlotPtr->LibName))
{
return CFE_ES_BAD_ARGUMENT;
}
/*
** Allocate an ES_LibTable entry
*/
IsModuleLoaded = false;
FunctionPointer = NULL;
ModuleId = OS_OBJECT_ID_UNDEFINED;
PendingLibId = CFE_ES_RESOURCEID_UNDEFINED;
Status = CFE_ES_ERR_LOAD_LIB; /* error that will be returned if no slots found */
CFE_ES_LockSharedData(__func__,__LINE__);
LibSlotPtr = CFE_ES_Global.LibTable;
for ( LibIndex = 0; LibIndex < CFE_PLATFORM_ES_MAX_LIBRARIES; ++LibIndex )
{
if (CFE_ES_LibRecordIsUsed(LibSlotPtr))
{
if (strcmp(LibSlotPtr->LibName, LibName) == 0)
{
/*
* Indicate to caller that the library is already loaded.
* (This is when there was a matching LibName in the table)
*
* Do nothing more; not logging this event as it may or may
* not be an error.
*/
*LibraryIdPtr = CFE_ES_LibRecordGetID(LibSlotPtr);
Status = CFE_ES_LIB_ALREADY_LOADED;
break;
}
}
else if (!CFE_ES_ResourceID_IsDefined(PendingLibId))
{
/* Remember list position as possible place for new entry. */
PendingLibId = CFE_ES_ResourceID_FromInteger(LibIndex + CFE_ES_LIBID_BASE);
Status = CFE_SUCCESS;
}
else
{
/* No action */
}
++LibSlotPtr;
}
if (Status == CFE_SUCCESS)
{
/* reset back to the saved index that was free */
LibSlotPtr = CFE_ES_LocateLibRecordByID(PendingLibId);
/* reserve the slot while still under lock */
strcpy(LibSlotPtr->LibName, LibName);
CFE_ES_LibRecordSetUsed(LibSlotPtr, CFE_ES_RESOURCEID_RESERVED);
*LibraryIdPtr = PendingLibId;
}
CFE_ES_UnlockSharedData(__func__,__LINE__);
/*
* If any off-nominal condition exists, skip the rest of this logic.
* Additionally write any extra information about what happened to syslog
* Note - not logging "already loaded" conditions, as this is not necessarily an error.
*/
if (Status != CFE_SUCCESS)
{
if (Status == CFE_ES_ERR_LOAD_LIB)
{
CFE_ES_WriteToSysLog("ES Startup: No free library slots available\n");
}
return Status;
}
/*
* -------------------
* IMPORTANT:
*
* there is now a reserved entry in the global library table,
* which must be freed if something goes wrong hereafter.
*
* Avoid any inline "return" statements - all paths must proceed to
* the end of this function where the cleanup will be done.
*
* Record sufficient breadcrumbs along the way, such that proper
* cleanup can be done in case it is necessary.
* -------------------
*/
/*
* STAGE 2:
* Do the OS_ModuleLoad() if is called for (i.e. ModuleLoadFile is NOT null)
*/
if (Status == CFE_SUCCESS && FileName != NULL)
{
Status = OS_ModuleLoad( &ModuleId, LibName, FileName );
if (Status == OS_SUCCESS)
{
Status = CFE_SUCCESS; /* just in case CFE_SUCCESS is different than OS_SUCCESS */
IsModuleLoaded = true;
}
else
{
/* load not successful. Note OS errors are better displayed as decimal integers. */
CFE_ES_WriteToSysLog("ES Startup: Could not load cFE Shared Library: %d\n", (int)Status);
Status = CFE_ES_ERR_LOAD_LIB; /* convert OS error to CFE error code */
}
}
/*
* STAGE 3:
* Figure out the Entry point / Initialization function.
*
* This depends on whether it is a dynamically loaded or a statically linked library,
* or it could be omitted altogether for libraries which do not require an init function.
*
* For dynamically loaded objects where FileName is non-NULL, the
* "EntryPointData" is a normal C string (const char *) with the name of the function.
*
* If the name of the function is the string "NULL" -- then treat this as no function
* needed and skip the lookup entirely (this is to support startup scripts where some
* string must be in the entry point field).
*/
if (Status == CFE_SUCCESS && EntryPointData != NULL)
{
if (strcmp(EntryPointData, "NULL") != 0)
{
/*
* If the entry point is explicitly set as NULL,
* this means the library has no init function - skip the lookup.
* Otherwise lookup the address of the entry point
*/
cpuaddr StartAddr;
Status = OS_SymbolLookup( &StartAddr, EntryPointData );
if (Status == OS_SUCCESS)
{
Status = CFE_SUCCESS; /* just in case CFE_SUCCESS is different than OS_SUCCESS */
FunctionPointer = (CFE_ES_LibraryEntryFuncPtr_t)StartAddr;
}
else
{
/* could not find symbol. Note OS errors are better displayed as decimal integers */
CFE_ES_WriteToSysLog("ES Startup: Could not find Library Init symbol:%s. EC = %d\n",
(const char *)EntryPointData, (int)Status);
Status = CFE_ES_ERR_LOAD_LIB; /* convert OS error to CFE error code */
}
}
}
/*
* STAGE 4:
* Call the Initialization function, if one was identified during the previous stage
*/
if (Status == CFE_SUCCESS && FunctionPointer != NULL)
{
/*
** Call the library initialization routine
*/
Status = (*FunctionPointer)(*LibraryIdPtr);
if (Status != CFE_SUCCESS)
{
CFE_ES_WriteToSysLog("ES Startup: Load Shared Library Init Error = 0x%08x\n", (unsigned int)Status);
}
}
/*
* LAST STAGE:
* Do final clean-up
*
* If fully successful, then increment the "RegisteredLibs" counter.
* Otherwise in case of an error, do clean up based on the breadcrumbs
*/
if(Status == CFE_SUCCESS)
{
/* Increment the counter, which needs to be done under lock */
CFE_ES_LockSharedData(__func__,__LINE__);
CFE_ES_LibRecordSetUsed(LibSlotPtr, PendingLibId);
CFE_ES_Global.RegisteredLibs++;
CFE_ES_UnlockSharedData(__func__,__LINE__);
}
else
{
/*
* If the above code had loaded a module, then unload it
*/
if (IsModuleLoaded)
{
OS_ModuleUnload( ModuleId );
}
/* Release Slot - No need to lock as it is resetting just a single value */
CFE_ES_LibRecordSetFree(LibSlotPtr);
}
return(Status);
} /* End Function */
/*
**---------------------------------------------------------------------------------------
** Name: CFE_ES_RunAppTableScan
**
** Purpose: This function scans the ES Application table and acts on the changes
** in application states. This is where the external cFE Applications are
** restarted, reloaded, or deleted.
**---------------------------------------------------------------------------------------
*/
bool CFE_ES_RunAppTableScan(uint32 ElapsedTime, void *Arg)
{
uint32 i;
CFE_ES_AppRecord_t *AppPtr;
CFE_ES_AppTableScanState_t *State = (CFE_ES_AppTableScanState_t *)Arg;
if (State->PendingAppStateChanges == 0)
{
/*
* If the command count changes, then a scan becomes due immediately.
*/
if (State->LastScanCommandCount == CFE_ES_TaskData.CommandCounter &&
State->BackgroundScanTimer > ElapsedTime)
{
/* no action at this time, background scan is not due yet */
State->BackgroundScanTimer -= ElapsedTime;
return false;
}
}
/*
* Every time a scan is initiated (for any reason)
* reset the background scan timer to the full value,
* and take a snapshot of the the command counter.
*/
State->BackgroundScanTimer = CFE_PLATFORM_ES_APP_SCAN_RATE;
State->LastScanCommandCount = CFE_ES_TaskData.CommandCounter;
State->PendingAppStateChanges = 0;
/*
* Scan needs to be done with the table locked,
* as these state changes need to be done atomically
* with respect to other tasks that also access/update
* the state.
*/
CFE_ES_LockSharedData(__func__,__LINE__);
/*
** Scan the ES Application table. Skip entries that are:
** - Not in use, or
** - cFE Core apps, or
** - Currently running
*/
AppPtr = CFE_ES_Global.AppTable;
for ( i = 0; i < CFE_PLATFORM_ES_MAX_APPLICATIONS; i++ )
{
if ( CFE_ES_AppRecordIsUsed(AppPtr) && AppPtr->Type == CFE_ES_AppType_EXTERNAL)
{
if (AppPtr->AppState > CFE_ES_AppState_RUNNING)
{
/*
* Increment the "pending" counter which reflects
* the number of apps that are in some phase of clean up.
*/
++State->PendingAppStateChanges;
/*
* Decrement the wait timer, if active.
* When the timeout value becomes zero, take the action to delete/restart/reload the app
*/
if ( AppPtr->ControlReq.AppTimerMsec > ElapsedTime )
{
AppPtr->ControlReq.AppTimerMsec -= ElapsedTime;
}
else
{
AppPtr->ControlReq.AppTimerMsec = 0;
/*
* Temporarily unlock the table, and invoke the
* control request function for this app.
*/
CFE_ES_UnlockSharedData(__func__,__LINE__);
CFE_ES_ProcessControlRequest(AppPtr);
CFE_ES_LockSharedData(__func__,__LINE__);
} /* end if */
}
else if (AppPtr->AppState == CFE_ES_AppState_RUNNING &&
AppPtr->ControlReq.AppControlRequest > CFE_ES_RunStatus_APP_RUN)
{
/* this happens after a command arrives to restart/reload/delete an app */
/* switch to WAITING state, and set the timer for transition */
AppPtr->AppState = CFE_ES_AppState_WAITING;
AppPtr->ControlReq.AppTimerMsec = CFE_PLATFORM_ES_APP_KILL_TIMEOUT * CFE_PLATFORM_ES_APP_SCAN_RATE;
}
} /* end if */
++AppPtr;
} /* end for loop */
CFE_ES_UnlockSharedData(__func__,__LINE__);
/*
* This state machine is considered active if there are any
* pending app state changes. Returning "true" will cause this job
* to be called from the background task at a faster interval.
*/
return (State->PendingAppStateChanges != 0);
} /* End Function */
/*
**---------------------------------------------------------------------------------------
** Name: CFE_ES_ProcessControlRequest
**
** Purpose: This function will perform the requested control action for an application.
**---------------------------------------------------------------------------------------
*/
void CFE_ES_ProcessControlRequest(CFE_ES_AppRecord_t *AppRecPtr)
{
int32 Status;
CFE_ES_AppStartParams_t AppStartParams;
CFE_ES_ResourceID_t NewAppId;
/*
** First get a copy of the Apps Start Parameters
*/
memcpy(&AppStartParams, &(AppRecPtr->StartParams), sizeof(CFE_ES_AppStartParams_t));
/*
** Now, find out what kind of Application control is being requested
*/
switch ( AppRecPtr->ControlReq.AppControlRequest )
{
case CFE_ES_RunStatus_APP_EXIT:
/*
** Kill the app, and dont restart it
*/
Status = CFE_ES_CleanUpApp(AppRecPtr);
if ( Status == CFE_SUCCESS )
{
CFE_EVS_SendEvent(CFE_ES_EXIT_APP_INF_EID, CFE_EVS_EventType_INFORMATION,
"Exit Application %s Completed.",AppStartParams.Name);
}
else
{
CFE_EVS_SendEvent(CFE_ES_EXIT_APP_ERR_EID, CFE_EVS_EventType_ERROR,
"Exit Application %s Failed: CleanUpApp Error 0x%08X.",AppStartParams.Name, (unsigned int)Status);
}
break;
case CFE_ES_RunStatus_APP_ERROR:
/*
** Kill the app, and dont restart it
*/
Status = CFE_ES_CleanUpApp(AppRecPtr);
if ( Status == CFE_SUCCESS )
{
CFE_EVS_SendEvent(CFE_ES_ERREXIT_APP_INF_EID, CFE_EVS_EventType_INFORMATION,
"Exit Application %s on Error Completed.",AppStartParams.Name);
}
else
{
CFE_EVS_SendEvent(CFE_ES_ERREXIT_APP_ERR_EID, CFE_EVS_EventType_ERROR,
"Exit Application %s on Error Failed: CleanUpApp Error 0x%08X.",AppStartParams.Name, (unsigned int)Status);
}
break;
case CFE_ES_RunStatus_SYS_DELETE:
/*
** Kill the app, and dont restart it
*/
Status = CFE_ES_CleanUpApp(AppRecPtr);
if ( Status == CFE_SUCCESS )
{
CFE_EVS_SendEvent(CFE_ES_STOP_INF_EID, CFE_EVS_EventType_INFORMATION,
"Stop Application %s Completed.",AppStartParams.Name);
}
else
{
CFE_EVS_SendEvent(CFE_ES_STOP_ERR3_EID, CFE_EVS_EventType_ERROR,
"Stop Application %s Failed: CleanUpApp Error 0x%08X.",AppStartParams.Name, (unsigned int)Status);
}
break;
case CFE_ES_RunStatus_SYS_RESTART:
/*
** Kill the app
*/
Status = CFE_ES_CleanUpApp(AppRecPtr);
if ( Status == CFE_SUCCESS )
{
/*
** And start it back up again
*/
Status = CFE_ES_AppCreate(&NewAppId, (char *)AppStartParams.FileName,
(char *)AppStartParams.EntryPoint,
(char *)AppStartParams.Name,
AppStartParams.Priority,
AppStartParams.StackSize,
AppStartParams.ExceptionAction);
if ( Status == CFE_SUCCESS )
{
CFE_EVS_SendEvent(CFE_ES_RESTART_APP_INF_EID, CFE_EVS_EventType_INFORMATION,
"Restart Application %s Completed.", AppStartParams.Name);
}
else
{
CFE_EVS_SendEvent(CFE_ES_RESTART_APP_ERR3_EID, CFE_EVS_EventType_ERROR,
"Restart Application %s Failed: AppCreate Error 0x%08X.", AppStartParams.Name, (unsigned int)Status);
}
}
else