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#pragma once
#include <jni/jni.hpp>
#include "../attach_env.hpp"
namespace mbgl {
namespace android {
// A deleter that doesn't retain an JNIEnv handle but instead tries to attach the JVM. This means
// it can be used on any thread to delete a global ref.
struct GenericGlobalRefDeleter {
void operator()(jni::jobject* p) const {
if (p) {
auto env = AttachEnv();
env->DeleteGlobalRef(jni::Unwrap(p));
}
}
};
template < class TagType >
class GenericWeakObjectRefDeleter;
template < class TagType = jni::ObjectTag >
using GenericUniqueWeakObject = std::unique_ptr< const jni::Object<TagType>, GenericWeakObjectRefDeleter<TagType> >;
template < class TagType >
class GenericWeakObjectRefDeleter
{
public:
using pointer = jni::PointerToValue< jni::Object<TagType> >;
void operator()(pointer p) const
{
if (p)
{
auto env = AttachEnv();
env->DeleteWeakGlobalRef(jni::Unwrap(p->Get()));
}
}
};
template < class TagType >
GenericUniqueWeakObject<TagType> SeizeGenericWeakRef(JNIEnv&, jni::Object<TagType>&& object)
{
return GenericUniqueWeakObject<TagType>(jni::PointerToValue<jni::Object<TagType>>(std::move(object)), GenericWeakObjectRefDeleter<TagType>());
};
} // namespace android
} // namespace mbgl
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