Scheduler.h

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#pragma once
 
#ifndef _SCHEDULER_INTERFACE_H_
#define _SCHEDULER_INTERFACE_H_
 
#include "../Network/Network.h"
#include "../Utils/ThreadsPool.h"
 
namespace Schedulers {

template <typename Time = Types::time_type>
struct CircuitInfo : ExecuteCircuit<Time> {
  using BitMapping = typename Circuits::Circuit<Time>::BitMapping;
 
  CircuitInfo() = default;
 
  CircuitInfo(const std::shared_ptr<Circuits::Circuit<Time>> &circuit,
              size_t shots, size_t id, size_t gatesDepth, Time timeDepth,
              size_t qubits)
      : ExecuteCircuit<Time>(circuit, shots), id(id), gatesDepth(gatesDepth),
        timeDepth(timeDepth), qubits(qubits) {}
 
  bool operator==(const CircuitInfo<Time> &other) const {
    if (ExecuteCircuit<Time>::operator==(other)) {
      return id == other.id && gatesDepth == other.gatesDepth &&
             timeDepth == other.timeDepth && qubits == other.qubits &&
             hostId == other.hostId;
    }
 
    return false;
  }
 
  size_t id = 0;
  size_t gatesDepth = 0;
  Time timeDepth = 0;
  size_t qubits = 0;
  BitMapping bitMapping;
 
  // those are redundant, but I set them anyway for convenience and easier usage
  // in python
  size_t hostId = 0;
  size_t startQubits = 0;
};

template <typename Time = Types::time_type> struct ExecuteJob {
  using NetworkClass = typename Network::INetwork<Time>;
  using ExecuteResults = typename NetworkClass::ExecuteResults;
 
  std::shared_ptr<NetworkClass> hostNetwork;
  size_t h = 0;
  std::shared_ptr<Circuits::Circuit<Time>> circ;
  size_t nrShots = 0;
  ExecuteResults results;
 
  void DoWork() {
    if (!hostNetwork || !circ || nrShots == 0)
      return;
 
    results = hostNetwork->RepeatedExecuteOnHost(circ, h, nrShots);
  }
 
  size_t GetJobCount() const { return 1; }
};

template <typename Time = Types::time_type>
class IScheduler : public std::enable_shared_from_this<IScheduler<Time>> {
public:
  using NetworkClass = typename Network::INetwork<Time>;
  using ExecuteResults = typename NetworkClass::ExecuteResults;
 
  virtual ~IScheduler() = default;
 
  virtual void SetNetwork(const std::shared_ptr<NetworkClass> &n) {
    network = n;
  }
 
  std::shared_ptr<NetworkClass> GetNetwork() const { return network; }

  virtual std::vector<ExecuteResults>
  ExecuteScheduled(const std::vector<ExecuteCircuit<Time>> &circuits) = 0;
 
  virtual std::shared_ptr<Circuits::Circuit<Time>>
  GetScheduledCircuit() const = 0;
 
  virtual std::vector<ExecuteResults> ExecuteScheduledSteps() = 0;
 
  virtual const std::vector<std::vector<CircuitInfo<Time>>> &
  GetScheduledSteps() const = 0;
 
  virtual void SetScheduledSteps(
      const std::vector<std::vector<CircuitInfo<Time>>> &steps) = 0;
 
  virtual bool SetCurrentStep(size_t step) = 0;
 
  virtual std::shared_ptr<Circuits::Circuit<Time>>
  GetScheduledCircuitForHost(size_t hostId) const = 0;
 
  virtual size_t GetCurrentShots() const = 0;
 
  virtual void ExecuteCurrentStep() = 0;
 
  virtual void SetDepthEstimationMethod(bool useSteps = true) = 0;
 
  virtual bool GetDepthEstimationMethod() const = 0;
 
  virtual void SetUseCost(bool useCost = true) = 0;
 
  virtual bool GetUseCost() const = 0;
 
  virtual void SetAddResetsAtEnd(bool addResets = true) = 0;
 
  virtual bool GetAddResetsAtEnd() const = 0;
 
  virtual void SetAddResetsAtStart(bool addResets = true) = 0;
 
  virtual bool GetAddResetsAtStart() const = 0;
 
  virtual std::vector<ExecuteResults> GetResults() const = 0;
 
  virtual void CollectResults(const ExecuteResults &res, size_t nrShots) = 0;
 
  virtual void CollectResultsForHost(const ExecuteResults &res, size_t hostId,
                                     size_t nrShots) = 0;
 
  virtual Network::SchedulerType GetType() const = 0;
 
private:
  std::shared_ptr<NetworkClass>
      network; 
};
} // namespace Schedulers
 
#endif