BLI_cache_mutex.hh

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include <atomic>
#include <mutex>
 
#include "BLI_function_ref.hh"
 
namespace blender {
 
class CacheMutex {
 private:
  std::mutex mutex_;
  std::atomic<bool> cache_valid_ = false;
 
 public:
  void ensure(FunctionRef<void()> compute_cache);
 
  void tag_dirty()
  {
    cache_valid_.store(false);
  }
 
  bool is_dirty() const
  {
    return !this->is_cached();
  }
 
  bool is_cached() const
  {
    return cache_valid_.load(std::memory_order_relaxed);
  }
};
 
}  // namespace blender