/*

 * 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

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 */

class JvmtiManageCapabilities : public AllStatic {

private:

  // these four capabilities sets represent all potentially

  // available capabilities.  They are disjoint, covering

  // the four cases: (OnLoad vs OnLoad+live phase) X

  // (one environment vs any environment).

  static jvmtiCapabilities always_capabilities;

  static jvmtiCapabilities onload_capabilities;

  static jvmtiCapabilities always_solo_capabilities;

  static jvmtiCapabilities onload_solo_capabilities;

  // solo capabilities that have not been grabbed

  static jvmtiCapabilities always_solo_remaining_capabilities;

  static jvmtiCapabilities onload_solo_remaining_capabilities;

  // all capabilities ever acquired

  static jvmtiCapabilities acquired_capabilities;

  // basic intenal operations

  static jvmtiCapabilities *either(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result);

  static jvmtiCapabilities *both(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result);

  static jvmtiCapabilities *exclude(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result);

  static bool has_some(const jvmtiCapabilities *a);

  static void update();

  // init functions

  static jvmtiCapabilities init_always_capabilities();

  static jvmtiCapabilities init_onload_capabilities();

  static jvmtiCapabilities init_always_solo_capabilities();

  static jvmtiCapabilities init_onload_solo_capabilities();

public:

  static void initialize();

  // may have to adjust always capabilities when VM initialization has completed

  static void recompute_always_capabilities();

  // queries and actions

  static void get_potential_capabilities(const jvmtiCapabilities *current,

                                         const jvmtiCapabilities *prohibited,

                                         jvmtiCapabilities *result);

  static jvmtiError add_capabilities(const jvmtiCapabilities *current,

                                     const jvmtiCapabilities *prohibited,

                                     const jvmtiCapabilities *desired,

                                     jvmtiCapabilities *result);

  static void relinquish_capabilities(const jvmtiCapabilities *current,

                                      const jvmtiCapabilities *unwanted,

                                      jvmtiCapabilities *result);

  static void copy_capabilities(const jvmtiCapabilities *from, jvmtiCapabilities *to);

#ifndef PRODUCT

  static void print(const jvmtiCapabilities* caps);

#endif

};