92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This source code is licensed under the BSD-style license found in the
|
||
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
||
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <memory>
|
||
|
|
#include <type_traits>
|
||
|
|
|
||
|
|
#include <jni.h>
|
||
|
|
|
||
|
|
#include <fb/Environment.h>
|
||
|
|
|
||
|
|
namespace facebook { namespace jni {
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
class GlobalReference {
|
||
|
|
static_assert(std::is_convertible<T, jobject>::value,
|
||
|
|
"GlobalReference<T> instantiated with type that is not "
|
||
|
|
"convertible to jobject");
|
||
|
|
|
||
|
|
public:
|
||
|
|
explicit GlobalReference(T globalReference) :
|
||
|
|
reference_(globalReference? Environment::current()->NewGlobalRef(globalReference) : nullptr) {
|
||
|
|
}
|
||
|
|
|
||
|
|
~GlobalReference() {
|
||
|
|
reset();
|
||
|
|
}
|
||
|
|
|
||
|
|
GlobalReference() :
|
||
|
|
reference_(nullptr) {
|
||
|
|
}
|
||
|
|
|
||
|
|
// enable move constructor and assignment
|
||
|
|
GlobalReference(GlobalReference&& rhs) :
|
||
|
|
reference_(std::move(rhs.reference_)) {
|
||
|
|
rhs.reference_ = nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
GlobalReference& operator=(GlobalReference&& rhs) {
|
||
|
|
if (this != &rhs) {
|
||
|
|
reset();
|
||
|
|
reference_ = std::move(rhs.reference_);
|
||
|
|
rhs.reference_ = nullptr;
|
||
|
|
}
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
GlobalReference(const GlobalReference<T>& rhs) :
|
||
|
|
reference_{} {
|
||
|
|
reset(rhs.get());
|
||
|
|
}
|
||
|
|
|
||
|
|
GlobalReference& operator=(const GlobalReference<T>& rhs) {
|
||
|
|
if (this == &rhs) {
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
reset(rhs.get());
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
explicit operator bool() const {
|
||
|
|
return (reference_ != nullptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
T get() const {
|
||
|
|
return reinterpret_cast<T>(reference_);
|
||
|
|
}
|
||
|
|
|
||
|
|
void reset(T globalReference = nullptr) {
|
||
|
|
if (reference_) {
|
||
|
|
Environment::current()->DeleteGlobalRef(reference_);
|
||
|
|
}
|
||
|
|
if (globalReference) {
|
||
|
|
reference_ = Environment::current()->NewGlobalRef(globalReference);
|
||
|
|
} else {
|
||
|
|
reference_ = nullptr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
jobject reference_;
|
||
|
|
};
|
||
|
|
|
||
|
|
}}
|