563 lines
No EOL
20 KiB
C
563 lines
No EOL
20 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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#include <pthread.h>
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/*
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Name: addProcess
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Process: allocates the memory for the pcb, grabs the data from the created PCB,
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dumps the data so that the node can be linked correctly.
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Function Input/Parameters: source PCB (ProcessControlBlock)
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Function Output/Parameters: none
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Function Output/Returned: filled PCB (ProcessControlBlock *)
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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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ProcessControlBlock *addProcess(const ProcessControlBlock source)
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{
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ProcessControlBlock *workingNode;
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workingNode = malloc(sizeof(ProcessControlBlock));
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workingNode->uniquePid = source.uniquePid;
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workingNode->cpuCycles = source.cpuCycles;
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workingNode->ioCycles = source.ioCycles;
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workingNode->nextOpCode = source.nextOpCode;
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workingNode->process_state = source.process_state;
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workingNode->timeLeft = source.timeLeft;
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workingNode->totalCycles = source.totalCycles;
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workingNode->nextPtr = NULL;
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// return workingNode
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return workingNode;
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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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Function Input/Parameters: metadata (OpCodeType *),
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headPointer (ProcessControlBlockLL *)
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Function Output/Parameters: none
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Function Output/Returned: pointer to filled PCB (ProcessControlBlockLL *)
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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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ProcessControlBlockLL *fillProcessList(ConfigDataType *configPtr, OpCodeType *metadataPtr, ProcessControlBlockLL *headPointer)
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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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ProcessControlBlock currentPCB;
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ProcessControlBlock *wkgPCBPtr;
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// need a variable to count how many IO cycles are in the process
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int ioCycleCount = 0;
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// need a variable to count how many CPU cycles are in the process
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int cpuCycleCount = 0;
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// need a variable to calculate the time left in ms for a process
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double timeLeftCount = 0.0;
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// need a variable that fills PIDs, starting at 0
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int processId = 0;
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// process variables?
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char *command;
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char *argument;
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char *inOutArg;
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int integerArgumentOne;
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// unused as of current
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//int integerArgumentTwo;
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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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// set another working pointer to the first part of the PCB list
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wkgPCBPtr = headPointer->headPtr;
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// grab the first command and argument
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command = wkgMetaPtr->command;
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argument = wkgMetaPtr->strArg1;
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inOutArg = wkgMetaPtr->inOutArg;
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// integer argument two is unused atm
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//integerArgumentTwo = wkgMetaPtr->intArg3;
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// loop through the process list, until you hit a sys end.
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while(wkgMetaPtr->nextNode != NULL && !(compareString(argument, "end") == 0 && compareString(command, "sys") == 0))
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{
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integerArgumentOne = wkgMetaPtr->intArg2;
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// printf("%s command, %s argument, %d\n", command, argument, integerArgumentOne);
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// if app start,
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if (compareString(command, "app") && compareString(argument, "start"))
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{
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// set the unique ID for both PCB and Metadata
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wkgMetaPtr->pid = processId;
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currentPCB.uniquePid = processId;
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// set the process state to PROCESS_STATE_NEW
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currentPCB.process_state = PROCESS_STATE_NEW;
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// set the nextOpCode as a pointer to the first place metadataPtr started
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currentPCB.nextOpCode = wkgMetaPtr->nextNode;
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}
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// count number of io cycles
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if(compareString(command, "dev") == 0)
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{
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integerArgumentOne = wkgMetaPtr->intArg2;
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if(compareString(inOutArg, "in") == 0)
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{
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//
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ioCycleCount = ioCycleCount + integerArgumentOne;
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}
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else
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{
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//
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ioCycleCount = ioCycleCount + integerArgumentOne;
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}
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}
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// count number of cpu cycles
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if ((compareString(argument, "process") == 0 && compareString(command, "cpu") == 0))
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{
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integerArgumentOne = wkgMetaPtr->intArg2;
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cpuCycleCount = cpuCycleCount + integerArgumentOne;
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}
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if ((compareString(argument, "end") == 0 && compareString(command, "app") == 0))
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{
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// set the ioCycles from variable
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currentPCB.ioCycles = ioCycleCount;
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// set the cpuCycles from variable
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currentPCB.cpuCycles = cpuCycleCount;
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// set totalCycles from adding both IO/CPU
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currentPCB.totalCycles = ioCycleCount + cpuCycleCount;
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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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timeLeftCount = (ioCycleCount * configPtr->ioCycleRate) + (cpuCycleCount * configPtr->procCycleRate);
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currentPCB.timeLeft = timeLeftCount;
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// increment the PID counter
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processId = processId + 1;
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ioCycleCount = 0;
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cpuCycleCount = 0;
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timeLeftCount = 0.0;
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// needs to add nodes to the end and all data once parsed
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// do both the metadata and PCBs
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if(headPointer->headPtr == NULL)
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{
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headPointer->headPtr = addProcess(currentPCB);
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wkgPCBPtr = headPointer->headPtr;
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}
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else
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{
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wkgPCBPtr->nextPtr = addProcess(currentPCB);
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wkgPCBPtr = wkgPCBPtr->nextPtr;
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}
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}
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// move to the next bit of data
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wkgMetaPtr = wkgMetaPtr->nextNode;
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command = wkgMetaPtr->command;
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argument = wkgMetaPtr->strArg1;
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inOutArg = wkgMetaPtr->inOutArg;
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}
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// return headPointer
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return headPointer;
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}
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/*
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Name: logOutput
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Process: Takes in a string, and then outputs it to monitor AND/OR file
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Function Input/Parameters: string (char *), file pointer (FILE *),
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configuration data (ConfigDataType *),
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end of simulator (bool)
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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: sprintf, ???
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*/
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void logOutput(ConfigDataType *configPtr, char *logStr, bool isEnd)
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{
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if(configPtr->logToCode == LOGTO_BOTH_CODE)
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{
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//
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FILE *fileWritePtr;
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fileWritePtr = fopen(configPtr->logToFileName, "w");
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if (fileWritePtr != NULL)
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{
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fprintf(fileWritePtr, "%s", logStr);
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fprintf(stdout, "%s", logStr);
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}
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// no return, void
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// close the file, if at the end.
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if (isEnd)
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{
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fclose(fileWritePtr);
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}
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// fclose(fileWritePtr);
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}
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else if(configPtr->logToCode == LOGTO_FILE_CODE)
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{
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//
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printf("\nSimulator will output to a file.\n");
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FILE *fileWritePtr;
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fileWritePtr = fopen(configPtr->logToFileName, "w");
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if (fileWritePtr != NULL)
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{
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fprintf(fileWritePtr, "%s", logStr);
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}
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// no return, void
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// close the file, if at the end.
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if (isEnd)
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{
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fclose(fileWritePtr);
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}
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// fclose(fileWritePtr);
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}
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else
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{
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fprintf(stdout, "%s", logStr);
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}
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}
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/*
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Name: runCPU
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Process: runs the CPU operations for however long it takes
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Function Input/Parameters: ???
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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 runCPU(char *command, char *argument, int intArg, ConfigDataType *configPtr, int processId)
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{
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char timeStringy[MAX_STR_LEN];
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// char *command = workingMeta->command;
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// char *argument = workingMeta->strArg1;
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// int intArg = workingMeta->intArg2;
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char cpuOutput[MAX_STR_LEN];
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int cpuTime = 0;
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cpuTime = intArg * configPtr->procCycleRate;
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sprintf(cpuOutput, "%f, Process: %d, %s %s operation start\n", accessTimer(LAP_TIMER, timeStringy), processId, command, argument);
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logOutput(configPtr, cpuOutput, false);
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// run timer for intArg * procCycleRate
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pthread_t cpuThread;
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pthread_create(&cpuThread, NULL, (void *)&simThread, (void *)cpuTime);
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pthread_join(cpuThread, NULL);
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sprintf(cpuOutput, "%f, Process: %d, %s %s operation end\n", accessTimer(LAP_TIMER, timeStringy), processId, command, argument);
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logOutput(configPtr, cpuOutput, false);
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// pthread_exit(NULL);
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}
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/*
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Name: runIO
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Process: runs the IO operations for however long it takes
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Function Input/Parameters: ???
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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 runIO(char *command, char *argument, int intArg, ConfigDataType *configPtr, int processId)
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{
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char timeStringy[MAX_STR_LEN];
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char ioOutput[MAX_STR_LEN];
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int ioTime = 0;
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ioTime = intArg * configPtr->ioCycleRate;
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sprintf(ioOutput, "%f, Process: %d, %s %s operation start\n", accessTimer(LAP_TIMER, timeStringy), processId, command, argument);
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logOutput(configPtr, ioOutput, false);
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pthread_t ioThread;
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pthread_create(&ioThread, NULL, (void *)&simThread, (void *)ioTime);
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pthread_join(ioThread, NULL);
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sprintf(ioOutput, "%f, Process: %d, %s %s operation end\n", accessTimer(LAP_TIMER, timeStringy), processId, command, argument);
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logOutput(configPtr, ioOutput, false);
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}
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/*
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Name: runProcess
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Process: runs the process that was selected
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Function Input/Parameters: ???
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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 runProcess(ProcessControlBlock *singlePCB, ConfigDataType *configPtr)
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{
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// run over the entire process, running the CPU when a CPU cycle comes up
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// or a run IO when an IO cycle comes up
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char timeStringy[MAX_STR_LEN];
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OpCodeType *workingMeta = singlePCB->nextOpCode;
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char *command;
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char *argument;
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int intArg;
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char *inOutArg;
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command = workingMeta->command;
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argument = workingMeta->strArg1;
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intArg = workingMeta->intArg2;
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inOutArg = workingMeta->inOutArg;
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while (!(compareString(command, "app") == 0 && compareString(argument, "end") == 0))
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{
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//
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if (compareString(command, "cpu") == 0 && compareString(argument, "process") == 0)
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{
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//
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runCPU(workingMeta->command, workingMeta->strArg1, workingMeta->intArg2, configPtr, singlePCB->uniquePid);
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}
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if(compareString(command, "dev") == 0)
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{
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//
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runIO(workingMeta->command, workingMeta->strArg1, workingMeta->intArg2, configPtr, singlePCB->uniquePid);
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}
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command = workingMeta->command;
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argument = workingMeta->strArg1;
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intArg = workingMeta->intArg2;
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workingMeta = workingMeta->nextNode;
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}
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// workingMeta = workingMeta->nextNode;
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// pthread_exit(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 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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ProcessControlBlock *pcbPtr;
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// string variable for nextCode, temp unused
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// char *nextCode;
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// string variable for the timer stuff
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char simulatorOutput[MAX_STR_LEN];
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char timeStringy[MAX_STR_LEN];
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accessTimer(ZERO_TIMER, timeStringy);
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// Operating System start timer goes here, log it.
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sprintf(simulatorOutput, "%f, OS: Simulator start\n", accessTimer(LAP_TIMER, timeStringy));
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logOutput(configPtr, simulatorOutput, false);
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// int variable for process to run
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int currentPid;
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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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// fill the process list given the metadata
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pcbList = fillProcessList(configPtr, metaDataMstrPtr, pcbList);
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pcbPtr = pcbList->headPtr;
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// calculate pcb total time
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int totalPCBTime = 0;
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while(pcbPtr != NULL)
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{
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totalPCBTime = totalPCBTime + pcbPtr->timeLeft;
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pcbPtr = pcbPtr->nextPtr;
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}
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pcbPtr = pcbList->headPtr;
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pthread_t cpuThread;
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pthread_create(&cpuThread, NULL, (void *)&simThread, (void *)totalPCBTime);
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pthread_join(cpuThread, NULL);
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//
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int processTimeLeft = pcbPtr->timeLeft;
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// set the current process id to the first scheduled process
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currentPid = scheduleProcess(pcbList, configPtr);
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// loop until current process is hit
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while(pcbPtr != NULL)
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{
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if(pcbPtr->uniquePid == currentPid)
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{
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// needs to set from READY to RUNNING
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pcbPtr->process_state = PROCESS_STATE_READY;
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sprintf(simulatorOutput, "%f, OS: Process %d set to RUNNING state from READY state\n", accessTimer(LAP_TIMER, timeStringy), pcbPtr->uniquePid);
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logOutput(configPtr, simulatorOutput, false);
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pthread_t runThread;
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pthread_create(&runThread, NULL, (void *)&simThread, (void *)processTimeLeft);
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pthread_join(runThread, NULL);
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// runCPU(pcbPtr, configPtr);
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runProcess(pcbPtr, configPtr);
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// when finished, set to terminated
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sprintf(simulatorOutput, "%f, OS: Process %d set to TERMINATED state from RUNNING state\n", accessTimer(LAP_TIMER, timeStringy), pcbPtr->uniquePid);
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logOutput(configPtr, simulatorOutput, false);
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pcbPtr->process_state = PROCESS_STATE_TERMINATED;
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}
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processTimeLeft = pcbPtr->timeLeft;
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pcbPtr = pcbPtr->nextPtr;
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currentPid = scheduleProcess(pcbList, configPtr);
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}
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// deallocate the process list with destroyProcessList
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destroyProcessList(pcbList);
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// once complete, log the output to FILE if required
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logOutput(configPtr, "", true);
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pthread_exit(NULL);
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// void function, no return.
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}
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/*
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Name: scheduleProcess
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Process: takes in the scheduling data, and then returns which process is to be ran
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Function Input/Parameters: head pointer of PCB List (ProcessControlBlockLL *),
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configuration data (ConfigDataType *)
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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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int scheduleProcess(ProcessControlBlockLL *headPointer, ConfigDataType *configPtr)
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{
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ProcessControlBlock *wkgPtr;
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int returnPid = -1;
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wkgPtr = headPointer->headPtr;
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char loggingStr[MAX_STR_LEN];
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char timeStringy[MAX_STR_LEN];
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// switch case for each scheduling algorithm
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switch (configPtr->cpuSchedCode)
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{
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case CPU_SCHED_FCFS_N_CODE:
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// First Come, First Served, Non-preemptive Scheduling
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// only one implemented for now. returns first process without fail.
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// need to find whichever process is first, AND the state is NEW.
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// will set the state to READY, return the pid of the process which
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// was set to ready.
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// set every process in the list to READY from NEW
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while(wkgPtr != NULL)
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|
{
|
|
//
|
|
if(wkgPtr->process_state != PROCESS_STATE_READY && wkgPtr->process_state != PROCESS_STATE_TERMINATED)
|
|
{
|
|
//
|
|
wkgPtr->process_state = PROCESS_STATE_READY;
|
|
// printf("Process %d set to READY from NEW\n", wkgPtr->uniquePid);
|
|
sprintf(loggingStr, "%f, OS: Process %d set to READY state from NEW state\n", accessTimer(LAP_TIMER, timeStringy), wkgPtr->uniquePid);
|
|
logOutput(configPtr, loggingStr, false);
|
|
}
|
|
|
|
wkgPtr = wkgPtr->nextPtr;
|
|
}
|
|
|
|
// reset the pointer to get ready for selection of process
|
|
wkgPtr = headPointer->headPtr;
|
|
while(wkgPtr != NULL && (returnPid == -1))
|
|
{
|
|
// check if the process is NOT terminated
|
|
if (wkgPtr->process_state == PROCESS_STATE_READY)
|
|
{
|
|
//printf("Process %d Selected with %.0f ms remaining\n", wkgPtr->uniquePid, wkgPtr->timeLeft);
|
|
sprintf(loggingStr, "%f, OS: Process %d selected with %.0f ms remaining\n", accessTimer(LAP_TIMER, timeStringy), wkgPtr->uniquePid, wkgPtr->timeLeft);
|
|
logOutput(configPtr, loggingStr, false);
|
|
returnPid = wkgPtr->uniquePid;
|
|
}
|
|
// move to next pointer
|
|
wkgPtr = wkgPtr->nextPtr;
|
|
}
|
|
break;
|
|
case CPU_SCHED_FCFS_P_CODE:
|
|
// TODO: First Come, First Served, Preemptive Scheduling
|
|
break;
|
|
case CPU_SCHED_RR_P_CODE:
|
|
// TODO: Round Robin Scheduling
|
|
break;
|
|
case CPU_SCHED_SJF_N_CODE:
|
|
// TODO: Shortest Job First Scheduling
|
|
break;
|
|
case CPU_SCHED_SRTF_P_CODE:
|
|
// TODO: Shortest Run-time First Scheduling
|
|
break;
|
|
}
|
|
// return returnPid
|
|
return returnPid;
|
|
}
|
|
|
|
/*
|
|
Name: simThread
|
|
Process: wrapper functions for threading in the simulator
|
|
Function Input/Parameters: milliseconds (int)
|
|
Function Output/Parameters: none
|
|
Function Output/Returned: none
|
|
Device Input/Device: none
|
|
Device Output/Device: none
|
|
Dependencies: ???
|
|
*/
|
|
void *simThread(int milSec)
|
|
{
|
|
runTimer(milSec);
|
|
pthread_exit(NULL);
|
|
} |