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
 
}