211 lines
No EOL
7.6 KiB
C
211 lines
No EOL
7.6 KiB
C
#include "configops.h"
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#include "metadataops.h"
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#include "StandardConstants.h"
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#include "simulator.h"
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/*
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Name: addProcess
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Process: adds a process to the
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Function Input/Parameters: none
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Function Output/Parameters: none
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Function Output/Returned: head pointer to the PCBs
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Device Input/Device: none
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Device Output/Device: none
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Dependencies: malloc, sizeof, fillProcessList
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*/
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// ProcessControlBlock *addProcess()
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// {
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// // return NULL (temp)
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// return NULL;
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// }
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/*
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Name: createProcessList
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Process: reads through the opcode struct to fill out the linked list of PCBs
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Function Input/Parameters: none
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Function Output/Parameters: none
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Function Output/Returned: head pointer to the PCBs
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Device Input/Device: none
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Device Output/Device: none
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Dependencies: malloc, sizeof, ???
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*/
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ProcessControlBlockLL *createProcessList()
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{
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// allocate and create the ProcessControlBlockLL using malloc and size of
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ProcessControlBlockLL *headBlock;
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headBlock = malloc(sizeof(ProcessControlBlockLL));
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// set the head pointer to NULL
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headBlock->headPtr = NULL;
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// return headBlock
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return headBlock;
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}
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/*
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Name: destroyProcessList
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Process: deallocates memory used for the linked list struct
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Function Input/Parameters: head pointer to linked list (ProcessControlBlockLL *)
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Function Output/Parameters: none
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Function Output/Returned: NULL
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Device Input/Device: none
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Device Output/Device: none
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Dependencies: free, destroyProcessListHelper, ???
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*/
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ProcessControlBlockLL *destroyProcessList(ProcessControlBlockLL *linkedListPtr)
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{
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// call the first destroyProcessListHelper
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destroyProcessListHelper(linkedListPtr->headPtr);
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// free the rest of the struct
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free(linkedListPtr);
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// return null
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return NULL;
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}
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/*
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Name: destroyProcessListHelper
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Process: recursively clears the PCB linked list struct, freeing the struct
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Function Input/Parameters: head pointer to linked list (ProcessControlBlockLL *)
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Function Output/Parameters: none
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Function Output/Returned: NULL
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Device Input/Device: none
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Device Output/Device: none
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Dependencies: free, destroyProcessListHelper(recursively), ???
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*/
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ProcessControlBlock *destroyProcessListHelper(ProcessControlBlock *nodePtr)
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{
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// check to see if the pointer is NOT null
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if(nodePtr != NULL)
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{
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// if not null, move to the next pointer (recurse)
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nodePtr->nextPtr = destroyProcessListHelper(nodePtr->nextPtr);
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}
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// free the 'parent' node
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free(nodePtr);
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// return null
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return NULL;
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}
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/*
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Name: fillProcessList
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Process: iterates through the metadata LL, fills out each process as needed.
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(Linking is left to the calling function, returns a pointer to the filled struct)
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Function Input/Parameters: metadata (OpCodeType *)
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Function Output/Parameters: none
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Function Output/Returned: pointer to filled PCB (ProcessControlBlock *)
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Device Input/Device: none
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Device Output/Device: none
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Dependencies: ???
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*/
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ProcessControlBlock *fillProcessList(OpCodeType *metadataPtr)
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{
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// initialize function/variables
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// need a working pointer for the metadata
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OpCodeType *wkgMetaPtr;
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// need a pointer to save the location of first metadata opcode
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OpCodeType metaAddress;
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// need a variable to count how many IO cycles are in the process
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int ioCycleCount;
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// need a variable to count how many CPU cycles are in the process
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int cpuCycleCount;
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// need a variable to calculate the time left in ms for a process
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int timeLeftCount;
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// temp variables?
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char *tempStrOne;
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char *tempStrTwo;
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// set the working pointer to the first part of the metadata pointer
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wkgMetaPtr = metadataPtr;
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//
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// loop through the process list, until you hit a sys end.
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while(wkgMetaPtr->nextNode != NULL)
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{
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tempStrOne = wkgMetaPtr->command;
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tempStrTwo = wkgMetaPtr->inOutArg;
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// if app start,
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if(compareString(tempStrOne, "app") && compareString(tempStrTwo, "start"))
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{
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// set the unique ID
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// set the process state to PROCESS_STATE_NEW
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// set the nextOpCode as a pointer to the first place metadataPtr started
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// loop while no longer have io or cpu instructions?
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// count number of io cycles
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// count number of cpu cycles
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// set the ioCycles from variable
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// set the cpuCycles from variable
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// set totalCycles from adding both IO/CPU
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// set the time left from (ioCycles * ioCycleRate) + (cpuCycles * procCyclesRate)
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// this gets the number of ms in the process.
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}
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}
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// return null (temp)
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return (ProcessControlBlock *)NULL;
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}
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/*
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Name: runSim
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Process: primary simulation driver
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Function Input/Parameters: configuration data (ConfigDataType *),
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metadata (OpCodeType *)
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Function Output/Parameters: none
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Function Output/Returned: none
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Device Input/Device: none
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Device Output/Device: none
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Dependencies: ???
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*/
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void runSim(ConfigDataType *configPtr, OpCodeType *metaDataMstrPtr)
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{
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// initialize function/variables
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// need a FILE * for file operations
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FILE *fileWritePtr;
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// need two working pointers, one for master loop, one for internal loop
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OpCodeType *wkgPtrMaster;
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// currentTime variable that stores the time. [now unsure if needed]
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// need a variable for headPointer to point
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ProcessControlBlockLL *pcbList;
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// string variable for nextCode
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char *nextCode;
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// create the process list with createProcessList, store the pointed to address
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pcbList = createProcessList();
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// create temp strings
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char *command;
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char *argument;
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// get the first data out of the metadata
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command = metaDataMstrPtr->command;
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argument = metaDataMstrPtr->strArg1;
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// set the master working pointer to the first metadata block
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wkgPtrMaster = metaDataMstrPtr;
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// function holds master loop, loops until sys end opcode found OR wkgPtrMaster nextNode != NULL
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while( wkgPtrMaster->nextNode != NULL || (compareString(argument, "end") && compareString(command, "sys")))
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{
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// will have a loop that goes from app start to app end for a PCB
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// (checks to see if the next instruction is NOT app end), using getNextProcess?
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// this will getNextOpCode
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// this will checkForIO and run the IO operations, outputting to FILE * and/or monitor
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// checkForIO will need the FILE * passed, will need timer access, and ???
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// this will checkForCPU and run the CPU operations, outputting to FILE * and/or monitor
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// checkForCPU will need the FILE * passed, will need timer access, and ???
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// TEMP
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printf("%s is command, %s is argument\n", command, argument);
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// TEMP END
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// move the wkgPtrMaster to the next metadata block
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wkgPtrMaster = wkgPtrMaster->nextNode;
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// set the command and argument to the current cmd and arg
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command = wkgPtrMaster->command;
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argument = wkgPtrMaster->strArg1;
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}
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//
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// deallocate the process list with destroyProcessList
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destroyProcessList(pcbList);
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//printf("runSim called here");
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// void function, no return.
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}
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// getNextProcess/scheduler/dispatcher run here, loads/"runs" the process
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// getNextOpCode, not needed for Sim02 apparently, keep in mind.
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// checkForIO, I think this gets passed the current process and runs the IO ops
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// checkForCPU, I think this gets passed the current process and runs the CPU ops
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// checkForMemory, I think this gets passed the current process
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// and runs mem ops (not needed for Sim02)
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// cpuIdler (not needed for Sim02)
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