/*

 * Copyright (c) 2015, 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_RUNTIME_COMMANDLINEFLAGCONSTRAINTLIST_HPP

#define SHARE_VM_RUNTIME_COMMANDLINEFLAGCONSTRAINTLIST_HPP

#include "runtime/globals.hpp"

#include "utilities/growableArray.hpp"

/*

 * Here we have a mechanism for extracting constraints (as custom functions) for flags,

 * which otherwise can not be expressed via simple range check, specified in flag macro tables.

 *

 * An example of a constraint is "flag1 < flag2" where both flag1 and flag2 can change.

 *

 * See runtime "runtime/commandLineFlagConstraintsCompiler.hpp",

 * "runtime/commandLineFlagConstraintsGC.hpp" and

 * "runtime/commandLineFlagConstraintsRuntime.hpp" for the functions themselves.

 */

typedef Flag::Error (*CommandLineFlagConstraintFunc_bool)(bool verbose, bool* value);

typedef Flag::Error (*CommandLineFlagConstraintFunc_int)(bool verbose, int* value);

typedef Flag::Error (*CommandLineFlagConstraintFunc_intx)(bool verbose, intx* value);

typedef Flag::Error (*CommandLineFlagConstraintFunc_uint)(bool verbose, uint* value);

typedef Flag::Error (*CommandLineFlagConstraintFunc_uintx)(bool verbose, uintx* value);

typedef Flag::Error (*CommandLineFlagConstraintFunc_uint64_t)(bool verbose, uint64_t* value);

typedef Flag::Error (*CommandLineFlagConstraintFunc_size_t)(bool verbose, size_t* value);

typedef Flag::Error (*CommandLineFlagConstraintFunc_double)(bool verbose, double* value);

class CommandLineFlagConstraint : public CHeapObj<mtInternal> {

private:

  const char* _name;

public:

  // the "name" argument must be a string literal

  CommandLineFlagConstraint(const char* name) { _name=name; };

  ~CommandLineFlagConstraint() {};

  const char* name() { return _name; }

  virtual Flag::Error apply_bool(bool* value, bool verbose = true) { ShouldNotReachHere(); return Flag::ERR_OTHER; };

  virtual Flag::Error apply_int(int* value, bool verbose = true) { ShouldNotReachHere(); return Flag::ERR_OTHER; };

  virtual Flag::Error apply_intx(intx* value, bool verbose = true) { ShouldNotReachHere(); return Flag::ERR_OTHER; };

  virtual Flag::Error apply_uint(uint* value, bool verbose = true) { ShouldNotReachHere(); return Flag::ERR_OTHER; };

  virtual Flag::Error apply_uintx(uintx* value, bool verbose = true) { ShouldNotReachHere(); return Flag::ERR_OTHER; };

  virtual Flag::Error apply_uint64_t(uint64_t* value, bool verbose = true) { ShouldNotReachHere(); return Flag::ERR_OTHER; };

  virtual Flag::Error apply_size_t(size_t* value, bool verbose = true) { ShouldNotReachHere(); return Flag::ERR_OTHER; };

  virtual Flag::Error apply_double(double* value, bool verbose = true) { ShouldNotReachHere(); return Flag::ERR_OTHER; };

};

class CommandLineFlagConstraintList : public AllStatic {

private:

  static GrowableArray<CommandLineFlagConstraint*>* _constraints;

public:

  static void init();

  static int length() { return (_constraints != NULL) ? _constraints->length() : 0; }

  static CommandLineFlagConstraint* at(int i) { return (_constraints != NULL) ? _constraints->at(i) : NULL; }

  static CommandLineFlagConstraint* find(const char* name);

  static void add(CommandLineFlagConstraint* constraint) { _constraints->append(constraint); }

};

#endif /* SHARE_VM_RUNTIME_COMMANDLINEFLAGCONSTRAINTLIST_HPP */