sunshine-sdk/src/sync.h

// Created by loki on 16-4-19.

#ifndef SUNSHINE_SYNC_H
#define SUNSHINE_SYNC_H

#include <array>
#include <mutex>
#include <utility>

namespace util {

template<class T, class M = std::mutex>
class sync_t {
public:
  using value_t = T;
  using mutex_t = M;

  std::lock_guard<mutex_t> lock() {
    return std::lock_guard { _lock };
  }

  template<class... Args>
  sync_t(Args &&...args) : raw { std::forward<Args>(args)... } {}

  sync_t &operator=(sync_t &&other) noexcept {
    std::lock(_lock, other._lock);

    raw = std::move(other.raw);

    _lock.unlock();
    other._lock.unlock();

    return *this;
  }

  sync_t &operator=(sync_t &other) noexcept {
    std::lock(_lock, other._lock);

    raw = other.raw;

    _lock.unlock();
    other._lock.unlock();

    return *this;
  }

  template<class V>
  sync_t &operator=(V &&val) {
    auto lg = lock();

    raw = val;

    return *this;
  }

  sync_t &operator=(const value_t &val) noexcept {
    auto lg = lock();

    raw = val;

    return *this;
  }

  sync_t &operator=(value_t &&val) noexcept {
    auto lg = lock();

    raw = std::move(val);

    return *this;
  }

  value_t *operator->() {
    return &raw;
  }

  value_t &operator*() {
    return raw;
  }

  const value_t &operator*() const {
    return raw;
  }

  value_t raw;

private:
  mutex_t _lock;
};

} // namespace util


#endif // SUNSHINE_SYNC_H