cancellation_token.hpp

#pragma once

#include "global.hpp"

namespace Cvb
{

CVB_BEGIN_INLINE_NS

template <>
inline HandleGuard<CancellationToken>::HandleGuard(void* handle) noexcept
  : HandleGuard<CancellationToken>(handle, [](void* handle) { CVB_CALL_CAPI(ReleaseObject(handle)); })
{
}


class CancellationToken
{
  friend class CancellationTokenSource;
  struct PrivateTag {};

public:

  CancellationToken(HandleGuard<CancellationToken>&& guard, PrivateTag) noexcept
    : handle_(std::move(guard))
  {
  }


  void* Handle() const noexcept
  {
    return handle_.Handle();
  }


  bool IsCanceled() const noexcept
  {
    CExports::cvbbool_t status = false;
    CVB_CALL_CAPI(CVCCancellationTokenIsCanceled(Handle(), status));
    // suppress VC waring  
    return status != 0;
  }

private:

  HandleGuard<CancellationToken> handle_;

};

CVB_END_INLINE_NS

}