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/*
* Author: Petre Eftime <petre.p.eftime@intel.com>
* Copyright (c) 2016 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma once
#include <jni.h>
#include <stdexcept>
extern JavaVM* vm;
class JNIEnvContainer {
private:
JNIEnv *env = nullptr;
public:
JNIEnv *operator*() {
attach();
return env;
}
JNIEnv *operator->() {
attach();
return env;
}
JNIEnvContainer() {
}
~JNIEnvContainer() {
detach();
}
void attach() {
if (env != nullptr)
return;
jint err = vm->AttachCurrentThreadAsDaemon((void **)&env, NULL);
if (err != JNI_OK)
throw std::runtime_error("Attach to VM failed");
}
void detach() {
if (env == nullptr)
return;
vm->DetachCurrentThread();
env = nullptr;
}
};
extern thread_local JNIEnvContainer jni_env;
class JNIGlobalRef {
private:
jobject object;
public:
JNIGlobalRef(jobject object) {
this->object = jni_env->NewGlobalRef(object);
}
~JNIGlobalRef() {
jni_env->DeleteGlobalRef(object);
}
jobject operator*() {
return object;
}
};
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