/*************************************************************************/
/*  thread_jandroid.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* 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 "thread_jandroid.h"

#include "os/memory.h"
#include "script_language.h"

Thread::ID ThreadAndroid::get_ID() const {

	return id;
}

Thread* ThreadAndroid::create_thread_jandroid() {

	return memnew( ThreadAndroid );
}

void *ThreadAndroid::thread_callback(void *userdata) {

	ThreadAndroid *t=reinterpret_cast<ThreadAndroid*>(userdata);
	setup_thread();
	ScriptServer::thread_enter(); //scripts may need to attach a stack
	t->id=(ID)pthread_self();
	t->callback(t->user);
	ScriptServer::thread_exit();
	return NULL;
}

Thread* ThreadAndroid::create_func_jandroid(ThreadCreateCallback p_callback,void *p_user,const Settings&) {

	ThreadAndroid *tr= memnew(ThreadAndroid);
	tr->callback=p_callback;
	tr->user=p_user;
	pthread_attr_init(&tr->pthread_attr);
	 pthread_attr_setdetachstate(&tr->pthread_attr, PTHREAD_CREATE_JOINABLE);

	pthread_create(&tr->pthread, &tr->pthread_attr, thread_callback, tr);

	return tr;
}

Thread::ID ThreadAndroid::get_thread_ID_func_jandroid() {

	return (ID)pthread_self();
}

void ThreadAndroid::wait_to_finish_func_jandroid(Thread* p_thread) {

	ThreadAndroid *tp=static_cast<ThreadAndroid*>(p_thread);
	ERR_FAIL_COND(!tp);
	ERR_FAIL_COND(tp->pthread==0);

	pthread_join(tp->pthread,NULL);
	tp->pthread=0;
}

void ThreadAndroid::_thread_destroyed(void* value) {

	/* The thread is being destroyed, detach it from the Java VM and set the mThreadKey value to NULL as required */
	JNIEnv *env = (JNIEnv*) value;
	if (env != NULL) {
		java_vm->DetachCurrentThread();
		pthread_setspecific(jvm_key, NULL);
	}

}

pthread_key_t ThreadAndroid::jvm_key;
JavaVM* ThreadAndroid::java_vm=NULL;

void ThreadAndroid::setup_thread() {

	if (pthread_getspecific(jvm_key))
		return; //already setup
	JNIEnv *env;
	java_vm->AttachCurrentThread(&env, NULL);
	pthread_setspecific(jvm_key, (void*) env);

}

void ThreadAndroid::make_default(JavaVM* p_java_vm) {

	java_vm=p_java_vm;
	create_func=create_func_jandroid;
	get_thread_ID_func=get_thread_ID_func_jandroid;
	wait_to_finish_func=wait_to_finish_func_jandroid;
	pthread_key_create(&jvm_key, _thread_destroyed);
	setup_thread();

}

JNIEnv *ThreadAndroid::get_env() {

	if (!pthread_getspecific(jvm_key)) {
		setup_thread();
	}

	JNIEnv *env=NULL;
	int status = java_vm->AttachCurrentThread(&env, NULL);
	return env;
}


ThreadAndroid::ThreadAndroid() {

	pthread=0;
}


ThreadAndroid::~ThreadAndroid() {

}


