b9972cee6e
Summary: @public Adjust license headers throughout the project Reviewed By: SidharthGuglani Differential Revision: D13255691 fbshipit-source-id: 98be2aa372a94e7a54a65e3d64e5c6a436b18083
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the LICENSE
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* file in the root directory of this source tree.
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*/
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#include "fb/fbjni.h"
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namespace facebook {
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namespace jni {
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namespace detail {
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void HybridData::setNativePointer(std::unique_ptr<BaseHybridClass> new_value) {
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static auto pointerField = getClass()->getField<jlong>("mNativePointer");
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auto* old_value = reinterpret_cast<BaseHybridClass*>(getFieldValue(pointerField));
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if (new_value) {
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// Modify should only ever be called once with a non-null
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// new_value. If this happens again it's a programmer error, so
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// blow up.
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FBASSERTMSGF(old_value == 0, "Attempt to set C++ native pointer twice");
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} else if (old_value == 0) {
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return;
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}
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// delete on a null pointer is defined to be a noop.
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delete old_value;
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// This releases ownership from the unique_ptr, and passes the pointer, and
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// ownership of it, to HybridData which is managed by the java GC. The
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// finalizer on hybridData calls resetNative which will delete the object, if
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// resetNative has not already been called.
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setFieldValue(pointerField, reinterpret_cast<jlong>(new_value.release()));
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}
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BaseHybridClass* HybridData::getNativePointer() {
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static auto pointerField = getClass()->getField<jlong>("mNativePointer");
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auto* value = reinterpret_cast<BaseHybridClass*>(getFieldValue(pointerField));
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if (!value) {
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throwNewJavaException("java/lang/NullPointerException", "java.lang.NullPointerException");
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}
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return value;
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}
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local_ref<HybridData> HybridData::create() {
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return newInstance();
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}
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}
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namespace {
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void resetNative(alias_ref<detail::HybridData> jthis) {
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jthis->setNativePointer(nullptr);
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}
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}
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void HybridDataOnLoad() {
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registerNatives("com/facebook/jni/HybridData", {
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makeNativeMethod("resetNative", resetNative),
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});
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}
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}}
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