dservice

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#include <cstdlib>
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#include "jnienv.h"
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static JavaVM *sJavaVM = nullptr;
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JNIEnv *getJniEnv() {
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    JNIEnv *env = nullptr;
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    switch (sJavaVM->GetEnv((void **) &env, JNI_VERSION_1_6)) {
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        case JNI_OK:
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            return env;
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        case JNI_EDETACHED: {
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            JavaVMAttachArgs args;
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            args.name = nullptr;
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            args.group = nullptr;
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            args.version = JNI_VERSION_1_6;
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            if (!sJavaVM->AttachCurrentThreadAsDaemon(&env, &args)) {
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                return env;
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            }
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            break;
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        }
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    }
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    return nullptr;
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};
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extern "C" JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *aJavaVM, void *aReserved) {
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    sJavaVM = aJavaVM;
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    return JNI_VERSION_1_6;
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}
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extern "C" JNIEXPORT void JNICALL JNI_OnUnload(JavaVM *aJavaVM, void *aReserved) {
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    sJavaVM = nullptr;
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}