/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <jni.h>
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#include <nativehelper/scoped_local_ref.h>
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#include <pthread.h>
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#include <android-base/logging.h>
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namespace art {
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static JavaVM* vm = nullptr;
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static void* Runner(void* arg) {
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CHECK(vm != nullptr);
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jobject thread_group = reinterpret_cast<jobject>(arg);
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JNIEnv* env = nullptr;
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JavaVMAttachArgs args = { JNI_VERSION_1_6, __FUNCTION__, thread_group };
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int attach_result = vm->AttachCurrentThread(&env, &args);
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CHECK_EQ(attach_result, 0);
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{
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ScopedLocalRef<jclass> klass(env, env->FindClass("Main"));
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CHECK(klass != nullptr);
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jmethodID id = env->GetStaticMethodID(klass.get(), "runFromNative", "()V");
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CHECK(id != nullptr);
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env->CallStaticVoidMethod(klass.get(), id);
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}
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int detach_result = vm->DetachCurrentThread();
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CHECK_EQ(detach_result, 0);
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return nullptr;
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_testNativeThread(
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JNIEnv* env, jclass, jobject thread_group) {
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CHECK_EQ(env->GetJavaVM(&vm), 0);
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jobject global_thread_group = env->NewGlobalRef(thread_group);
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pthread_t pthread;
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int pthread_create_result = pthread_create(&pthread, nullptr, Runner, global_thread_group);
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CHECK_EQ(pthread_create_result, 0);
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int pthread_join_result = pthread_join(pthread, nullptr);
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CHECK_EQ(pthread_join_result, 0);
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env->DeleteGlobalRef(global_thread_group);
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}
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} // namespace art
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