/*

 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_VM_PRIMS_WHITEBOX_HPP

#define SHARE_VM_PRIMS_WHITEBOX_HPP

#include "prims/jni.h"

#include "memory/allocation.hpp"

#include "oops/oopsHierarchy.hpp"

// Entry macro to transition from JNI to VM state.

#define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header)

#define WB_END JNI_END

#define WB_METHOD_DECLARE(result_type) extern "C" result_type JNICALL

#define CHECK_JNI_EXCEPTION_(env, value)                               \

  do {                                                                 \

    JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \

    if (HAS_PENDING_EXCEPTION) {                                       \

      return(value);                                                   \

    }                                                                  \

  } while (0)

#define CHECK_JNI_EXCEPTION(env)                                       \

  do {                                                                 \

    JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \

    if (HAS_PENDING_EXCEPTION) {                                       \

      return;                                                          \

    }                                                                  \

  } while (0)

class WhiteBox : public AllStatic {

 private:

  static bool _used;

 public:

  static bool used()     { return _used; }

  static void set_used() { _used = true; }

  static int offset_for_field(const char* field_name, oop object,

    Symbol* signature_symbol);

  static const char* lookup_jstring(const char* field_name, oop object);

  static bool lookup_bool(const char* field_name, oop object);

};

#endif // SHARE_VM_PRIMS_WHITEBOX_HPP