script_context.hpp

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#pragma once
 
#include <atomic>
#include <cstddef>
#include <cstdint>
#include <memory>
#include <toast/world/box.hpp>
 
namespace toast {
class Node;
}
 
namespace scripting {

struct RuntimeToken {
  std::atomic<bool> alive {true};
  uint32_t id = 0;
  size_t vm_index = 0;
};

struct ScriptContext {
  toast::Box<toast::Node> node;
  std::shared_ptr<RuntimeToken> token;
};

[[nodiscard]]
auto currentScriptNode() -> toast::Box<toast::Node>;
 
[[nodiscard]]
auto currentScriptContext() -> const ScriptContext&;
 
class ScriptNodeContextScope {
public:
  explicit ScriptNodeContextScope(toast::Box<toast::Node> node, std::shared_ptr<RuntimeToken> token = {}) noexcept;
  ~ScriptNodeContextScope() noexcept;
 
  ScriptNodeContextScope(const ScriptNodeContextScope&) = delete;
  auto operator=(const ScriptNodeContextScope&) -> ScriptNodeContextScope& = delete;
  ScriptNodeContextScope(ScriptNodeContextScope&&) = delete;
  auto operator=(ScriptNodeContextScope&&) -> ScriptNodeContextScope& = delete;
 
private:
  ScriptContext m_previous;
};
 
}