修改linphonesdkandroid中篇

多线程问题，第一想法是通过加锁，保障代码间调用的互斥性

再次关上jni.mustache，增加互斥锁相干代码：

// Added by guodongAndroid on 2022/04/22
#ifdef __ANDROID__
static pthread_mutex_t mutex;
#endif /* __ANDROID__ */

JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *ajvm, void *reserved) {
#ifdef __ANDROID__
    ms_set_jvm(ajvm);
    int result = pthread_mutex_init(&mutex, NULL);
    __android_log_print(ANDROID_LOG_DEBUG, "guodongAndroid", "JNI_OnLoad, mutex init result = %d", result);
#endif /* __ANDROID__ */
    jvm = ajvm;
    return JNI_VERSION_1_2;
}

// Added by guodongAndroid on 2022/04/22
JNIEXPORT void JNI_OnUnload(JavaVM *ajvm, void *reserved) {
#ifdef __ANDROID__
    int result = pthread_mutex_destroy(&mutex);
    __android_log_print(ANDROID_LOG_DEBUG, "guodongAndroid", "JNI_OnUnload, mutex destroy result = %d", result);
#endif /* __ANDROID__ */
}

{{#objects}}
JNIEXPORT jobject JNICALL get{{className}}(JNIEnv *env, {{classCName}} *cptr, bool_t takeref) {
    jobject jobj = nullptr;

    if (cptr != nullptr) {
        // begin add
        {{#isLoggingService}}
        #ifdef __ANDROID__
        pthread_mutex_lock(&mutex);
        #endif /* __ANDROID__ */
        {{/isLoggingService}}
        // end add
        
        void *up = belle_sip_object_data_get((belle_sip_object_t *)cptr, belle_sip_java_user_data_key);
        LinphoneJavaBindings *ljb = (LinphoneJavaBindings *)linphone_factory_get_user_data(linphone_factory_get());
        if (!ljb) {
            ljb = new LinphoneJavaBindings(env);
            linphone_factory_set_user_data(linphone_factory_get(), ljb);
        }

        jclass {{cPrefix}}_class = ljb->{{cPrefix}}_class;
        jmethodID {{cPrefix}}_cOnstructor= ljb->{{cPrefix}}_class_constructor;

        {{#isLoggingService}}
        #ifdef __ANDROID__
        __android_log_print(ANDROID_LOG_DEBUG, "guodongAndroid", "up = %p", up);
        
        jobject temp_jobj1 = (jobject)up;
        jboolean up_available1 = env->IsSameObject(temp_jobj1, NULL);
        __android_log_print(ANDROID_LOG_DEBUG, "guodongAndroid", "up_available1 = %d", up_available1);
        
        jobject temp_jobj2 = (jobject)up;
        jboolean up_available2 = env->IsSameObject(temp_jobj2, nullptr);
        __android_log_print(ANDROID_LOG_DEBUG, "guodongAndroid", "up_available2 = %d", up_available2);
        #endif /* __ANDROID__ */
        {{/isLoggingService}}

        if (up == nullptr) {
            jobj = env->NewObject({{cPrefix}}_class, {{cPrefix}}_constructor, (jlong)cptr);
            belle_sip_object_data_set((belle_sip_object_t *)cptr, belle_sip_java_user_data_key, (void*)env->NewWeakGlobalRef(jobj), nullptr);
            if (takeref)
                {{#refCountable}}{{cPrefix}}_ref(cptr);{{/refCountable}}
        } else {
            jobj = env->NewLocalRef((jobject)up);
            if (jobj == nullptr) {
                // Delete weak ref ?
                env->DeleteWeakGlobalRef((jobject)up);
                // takes implicit local ref
                jobj = env->NewObject({{cPrefix}}_class, {{cPrefix}}_constructor, (jlong)cptr);
                belle_sip_object_data_set((belle_sip_object_t *)cptr, belle_sip_java_user_data_key, (void*)env->NewWeakGlobalRef(jobj), nullptr);
                if (takeref)
                    {{#refCountable}}{{cPrefix}}_ref(cptr);{{/refCountable}}
            }
        }
        
        // begin add
        {{#isLoggingService}}
        pthread_mutex_unlock(&mutex);
        {{/isLoggingService}}
        // end add
    }
    return jobj;
}

JNIEXPORT jboolean JNICALL Java_{{jniPrefix}}{{classImplName}}_unref(JNIEnv* env, jobject thiz, jlong ptr) {
    {{classCName}} *cptr = ({{classCName}}*)ptr;
    if (cptr == 0) {
        bctbx_error("Java_{{jniPrefix}}{{classImplName}}_unref&＃039;s {{classCName}} C ptr is null!");
        return TRUE;
    }

    // begin add
    {{#isLoggingService}}
    #ifdef __ANDROID__
    pthread_mutex_lock(&mutex);
    #endif /* __ANDROID__ */
    {{/isLoggingService}}
    // end add
    
    jobject wref = (jobject)belle_sip_object_data_get((belle_sip_object_t *)cptr, belle_sip_java_user_data_key);

    {{#isLoggingService}}
    #ifdef __ANDROID__
    __android_log_print(ANDROID_LOG_DEBUG, "guodongAndroid", "unref wref = %p", wref);
    #endif /* __ANDROID__ */
    {{/isLoggingService}}

    belle_sip_object_data_set((belle_sip_object_t *)cptr, belle_sip_java_user_data_key, nullptr, nullptr);
    if (wref) {
        env->DeleteWeakGlobalRef(wref);
    }
    
    // begin add
    {{#isLoggingService}}
    pthread_mutex_unlock(&mutex);
    {{/isLoggingService}}
    // end add
    
    {{#refCountable}}return belle_sip_object_unref_2(cptr) == 1;{{/refCountable}}
    {{#notRefCountable}}return FALSE;{{/notRefCountable}}
}