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Chapter6:ProcessSynchronizationModule6:ProcessSynchronizationBackgroundSharedMemoryRaceConditionCritical-SectionProblemSolutiontoCritical-SectionProblemPeterson’sSolutionAlgorithmforProcessPiAproblemsolutionSynchronizationHardwareTestAndndSetInstructionSwapInstructionSolutionusingSwapSemaphoreSemaphoreasGeneralSynchronizationToolSynchronizationandMutual-exclusionSpinlockSemaphoreImplementationwithnoBusywaitingSemaphoreImplementationwithnoBusywaiting(Cont.)SemaphoreImplementationClassicalProblemsofSynchronizationBounded-BufferProblemBoundedBufferProblem(Cont.)Example--chessExample---father,sonanddaughterReaders-WritersProblemReaders-WritersProblem(Reader-first)Readers-WritersProblem(Writer-first)Example---TicketAgentaentranceandaexit,50purchasersatmost:purchaserprocessesTrafficonlyinonedirection:AtoBorBtoAatthesametime.Dining-PhilosophersProblemDining-PhilosophersProblem(Cont.)ProblemswithSemaphoresDeadlockandStarvationMonitorsSchematicviewofaMonitorConditionVariablesMonitorwithConditionVariablesSolutiontoDiningPhilosophersSolutiontoDiningPhilosophers(cont)SolutiontoDiningPhilosophers(cont)MonitorImplementationUsingSemaphoresMonitorImplementationMonitorImplementationSynchronizationExamplesSolarisSynchronizationWindowsXPSynchronizationLinuxSynchronizationPthreadsSynchronizationAtomicTransactionsSystemModelTypesofStorageMediaLog-BasedRecoveryLog-BasedRecoveryAlgorithmCheckpointsConcurrentTransactionsSerializabilitySchedule1:T0thenT1NonserialScheduleSchedule2:ConcurrentSerializableScheduleLockingProtocolTwo-phaseLockingProtocolTimestamp-basedProtocolsTimestamp-basedProtocolImplementationTimestamp-orderingProtocolSchedulePossibleUnderTimestampProtocolEndofChapter6
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