_externref_class.hh

#ifndef WASMTIME_EXTERNREF_CLASS_HH
#define WASMTIME_EXTERNREF_CLASS_HH
 
#include <wasmtime/conf.h>
 
#ifdef WASMTIME_FEATURE_GC
 
#include <wasmtime/_store_class.hh>
#include <wasmtime/externref.h>
#include <wasmtime/helpers.hh>
 
namespace wasmtime {
 
class ExternRef {
  WASMTIME_TOP_REF_WRAPPER(ExternRef, wasmtime_externref);
 
private:
  static void finalizer(void *ptr) {
    std::unique_ptr<std::any> _ptr(static_cast<std::any *>(ptr));
  }
 
public:
  explicit ExternRef(Store::Context cx, std::any val) {
    void *ptr = std::make_unique<std::any>(val).release();
    bool ok = wasmtime_externref_new(cx.capi(), ptr, finalizer, &this->raw);
    if (!ok) {
      fprintf(stderr, "failed to allocate a new externref");
      abort();
    }
  }
 
  std::any &data(Store::Context cx) {
    return *static_cast<std::any *>(wasmtime_externref_data(cx.capi(), &raw));
  }
};
 
} // namespace wasmtime
 
#endif // WASMTIME_FEATURE_GC
 
#endif // WASMTIME_EXTERNREF_CLASS_HH