1 /*

     2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

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

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

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_RUNTIME_COMMANDLINEFLAGCONSTRAINTLIST_HPP

    26 #define SHARE_VM_RUNTIME_COMMANDLINEFLAGCONSTRAINTLIST_HPP

    27 

    28 #include "runtime/globals.hpp"

    29 #include "utilities/growableArray.hpp"

    30 

    31 /*

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

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

    34  *

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

    36  *

    37  * See runtime "runtime/commandLineFlagConstraintsCompiler.hpp",

    38  * "runtime/commandLineFlagConstraintsGC.hpp" and

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

    40  */

    41 

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

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

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

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

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

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

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

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

    50 

    51 class CommandLineFlagConstraint : public CHeapObj<mtInternal> {

    52 private:

    53   const char* _name;

    54 public:

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

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

    57   ~CommandLineFlagConstraint() {};

    58   const char* name() { return _name; }

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

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

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

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

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

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

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

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

    67 };

    68 

    69 class CommandLineFlagConstraintList : public AllStatic {

    70 private:

    71   static GrowableArray<CommandLineFlagConstraint*>* _constraints;

    72 public:

    73   static void init();

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

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

    76   static CommandLineFlagConstraint* find(const char* name);

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

    78 };

    79 

    80 #endif /* SHARE_VM_RUNTIME_COMMANDLINEFLAGCONSTRAINTLIST_HPP */