i_scheduler.h

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#pragma once
 
#include <memory>
#include <string_view>
#include <vector>
 
#include "contur/core/error.h"
#include "contur/core/types.h"
 
namespace contur {
 
    class IClock;
    class PCB;
    class ISchedulingPolicy;

    class IScheduler
    {
        public:
        virtual ~IScheduler() = default;

        [[nodiscard]] virtual Result<void> enqueue(PCB &pcb, Tick currentTick) = 0;

        [[nodiscard]] virtual Result<void> dequeue(ProcessId pid) = 0;

        [[nodiscard]] virtual Result<ProcessId> selectNext(const IClock &clock) = 0;

        [[nodiscard]] virtual Result<void> blockRunning(Tick currentTick) = 0;

        [[nodiscard]] virtual Result<void> blockProcess(ProcessId pid, Tick currentTick) = 0;

        [[nodiscard]] virtual Result<void> unblock(ProcessId pid, Tick currentTick) = 0;

        [[nodiscard]] virtual Result<void> terminate(ProcessId pid, Tick currentTick) = 0;

        [[nodiscard]] virtual std::vector<ProcessId> getQueueSnapshot() const = 0;

        [[nodiscard]] virtual std::vector<ProcessId> getBlockedSnapshot() const = 0;

        [[nodiscard]] virtual Result<void> configureLanes(std::size_t laneCount) = 0;

        [[nodiscard]] virtual std::size_t laneCount() const noexcept = 0;

        [[nodiscard]] virtual Result<void> enqueueToLane(PCB &pcb, std::size_t laneIndex, Tick currentTick) = 0;

        [[nodiscard]] virtual Result<ProcessId> selectNextForLane(std::size_t laneIndex, const IClock &clock) = 0;

        [[nodiscard]] virtual Result<ProcessId> stealNextForLane(std::size_t thiefLane, const IClock &clock) = 0;

        [[nodiscard]] virtual std::vector<std::vector<ProcessId>> getPerLaneQueueSnapshot() const = 0;

        [[nodiscard]] virtual std::vector<ProcessId> runningProcesses() const = 0;

        [[nodiscard]] virtual Result<void> setPolicy(std::unique_ptr<ISchedulingPolicy> policy) = 0;

        [[nodiscard]] virtual std::string_view policyName() const noexcept = 0;
    };
 
} // namespace contur