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/*
* Author: Petre Eftime <petre.p.eftime@intel.com>
* Copyright (c) 2016 Intel Corporation.
*
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* 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.
*/
#ifndef JNIMEM__HPP_
#define JNIMEM__HPP_
#include <jni.h>
#include <stdexcept>
#include "BasicTypes.hpp"
extern JavaVM* vm;
/*
* This class provides a lifetime-managed JNIEnv object, which attaches or
* detaches the current thread from the JVM automatically
*/
class JNIEnvContainer {
private:
JNIEnv *env = nullptr;
bool needsDetach = false;
public:
/* Attaches this thread to the JVM if it is not already attached */
JNIEnvContainer();
/* Detaches this thread to the JVM if it is attached */
~JNIEnvContainer();
/* Provides access to the local thread's JNIEnv object */
JNIEnv *operator*();
/* Provides access to the local thread's JNIEnv object's methods */
JNIEnv *operator->();
/* Attaches this thread to the JVM if it is not already attached */
void attach();
/* Detaches this thread to the JVM if it is attached */
void detach();
};
/* Each thread has a local jni_env variable of JNIEnvContainer type */
extern thread_local JNIEnvContainer jni_env;
/*
* This class provides a lifetime-managed GlobalRef variable, which is automatically
* deleted when it goes out of scope.
*/
class JNIGlobalRef {
private:
jobject object;
public:
static inline void check(jobject object, const char* file, int line) {
if( nullptr == object ) {
throw direct_bt::RuntimeException("JNIGlobalRef::check: Null jobject", file, line);
}
}
/* Creates a GlobalRef from an object passed to it */
JNIGlobalRef(jobject object);
JNIGlobalRef(const JNIGlobalRef &o);
JNIGlobalRef(JNIGlobalRef &&o);
JNIGlobalRef& operator=(const JNIGlobalRef &o);
JNIGlobalRef& operator=(JNIGlobalRef &&o);
/* Deletes the stored GlobalRef */
~JNIGlobalRef();
/* Provides access to the stored GlobalRef as an jobject. */
jobject operator*() { return object; }
/* Provides access to the stored GlobalRef as an jobject. */
jobject getObject() const { return object; }
/* Provides access to the stored GlobalRef as a jclass. */
jclass getClass() const { return (jclass)object; }
bool operator==(const JNIGlobalRef& rhs) const;
bool operator!=(const JNIGlobalRef& rhs) const
{ return !( *this == rhs ); }
};
#endif /* JNIMEM__HPP_ */
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