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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.
*/
#include <cstdio>
#include "JNIMem.hpp"
// #define VERBOSE_ON 1
#ifdef VERBOSE_ON
#define DBG_PRINT(...) { fprintf(stderr, __VA_ARGS__); fprintf(stderr, "\n"); fflush(stderr); }
#else
#define DBG_PRINT(...)
#endif
JavaVM* vm;
thread_local JNIEnvContainer jni_env;
jint JNI_OnLoad(JavaVM *initVM, void *reserved) {
(void)reserved; // warning
vm = initVM;
return JNI_VERSION_1_8;
}
JNIEnv *JNIEnvContainer::operator*() {
attach();
return env;
}
JNIEnv *JNIEnvContainer::operator->() {
attach();
return env;
}
JNIEnvContainer::JNIEnvContainer() {}
JNIEnvContainer::~JNIEnvContainer() {
detach();
}
void JNIEnvContainer::attach() {
if (env != nullptr) {
return;
}
JNIEnv *newEnv = nullptr;
int envRes;
envRes = vm->GetEnv((void **) &env, JNI_VERSION_1_8) ;
if( JNI_EDETACHED == envRes ) {
envRes = vm->AttachCurrentThreadAsDaemon((void**) &newEnv, NULL);
if( JNI_OK != envRes ) {
throw direct_bt::RuntimeException("Attach to VM failed", E_FILE_LINE);
}
env = newEnv;
} else if( JNI_OK != envRes ) {
throw direct_bt::RuntimeException("GetEnv of VM failed", E_FILE_LINE);
}
if (env==NULL) {
throw direct_bt::RuntimeException("GetEnv of VM is NULL", E_FILE_LINE);
}
needsDetach = NULL != newEnv;
}
void JNIEnvContainer::detach() {
if (env == nullptr) {
return;
}
if( needsDetach ) {
vm->DetachCurrentThread();
}
env = nullptr;
needsDetach = false;
}
JNIGlobalRef::JNIGlobalRef(jobject object) {
if( nullptr == object ) {
throw direct_bt::RuntimeException("JNIGlobalRef ctor null jobject", E_FILE_LINE);
}
this->object = jni_env->NewGlobalRef(object);
DBG_PRINT("JNIGlobalRef::def_ctor %p -> %p", object, this->object);
}
JNIGlobalRef::JNIGlobalRef(const JNIGlobalRef &o) {
if( nullptr == o.object ) {
throw direct_bt::RuntimeException("Other JNIGlobalRef jobject is null", E_FILE_LINE);
}
object = jni_env->NewGlobalRef(o.object);
DBG_PRINT("JNIGlobalRef::copy_ctor %p -> %p", o.object, object);
}
JNIGlobalRef::JNIGlobalRef(JNIGlobalRef &&o)
: object(o.object) {
DBG_PRINT("JNIGlobalRef::move_ctor %p (nulled) -> %p", o.object, object);
o.object = nullptr;
}
JNIGlobalRef& JNIGlobalRef::operator=(const JNIGlobalRef &o) {
if( &o == this ) {
return *this;
}
JNIEnv * env = *jni_env;
if( nullptr != object ) { // always
env->DeleteGlobalRef(object);
}
if( nullptr == o.object ) {
throw direct_bt::RuntimeException("Other JNIGlobalRef jobject is null", E_FILE_LINE);
}
object = jni_env->NewGlobalRef(o.object);
DBG_PRINT("JNIGlobalRef::copy_assign %p -> %p", o.object, object);
return *this;
}
JNIGlobalRef& JNIGlobalRef::operator=(JNIGlobalRef &&o) {
object = o.object;
DBG_PRINT("JNIGlobalRef::move_assign %p (nulled) -> %p", o.object, object);
o.object = nullptr;
return *this;
}
JNIGlobalRef::~JNIGlobalRef() {
try {
JNIEnv * env = *jni_env;
if( nullptr == env ) {
throw direct_bt::RuntimeException("JNIGlobalRef dtor null JNIEnv", E_FILE_LINE);
}
DBG_PRINT("JNIGlobalRef::dtor %p", object);
if( nullptr != object ) {
// due to move ctor and assignment, we accept nullptr object
env->DeleteGlobalRef(object);
}
} catch (std::exception &e) {
fprintf(stderr, "JNIGlobalRef dtor: Caught %s\n", e.what());
}
}
bool JNIGlobalRef::operator==(const JNIGlobalRef& rhs) const {
if( &rhs == this ) {
DBG_PRINT("JNIGlobalRef::== true: %p == %p (ptr)", object, rhs.object);
return true;
}
bool res = JNI_TRUE == jni_env->IsSameObject(object, rhs.object);
DBG_PRINT("JNIGlobalRef::== %d: %p == %p (IsSameObject)", res, object, rhs.object);
return res;
}
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