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_SERVICES_WRITEABLEFLAG_HPP
26 #define SHARE_VM_SERVICES_WRITEABLEFLAG_HPP
27
28 class WriteableFlags : AllStatic {
29 public:
30 enum error {
31 // no error
32 SUCCESS,
33 // flag name is missing
34 MISSING_NAME,
35 // flag value is missing
36 MISSING_VALUE,
37 // error parsing the textual form of the value
38 WRONG_FORMAT,
39 // flag is not writeable
40 NON_WRITABLE,
41 // flag value is outside of its bounds
42 OUT_OF_BOUNDS,
43 // there is no flag with the given name
44 INVALID_FLAG,
45 // other, unspecified error related to setting the flag
46 ERR_OTHER
47 } err;
48
49 private:
50 // a writeable flag setter accepting either 'jvalue' or 'char *' values
51 static int set_flag(const char* name, const void* value, int(*setter)(Flag*, const void*, Flag::Flags, FormatBuffer<80>&), Flag::Flags origin, FormatBuffer<80>& err_msg);
52 // a writeable flag setter accepting 'char *' values
53 static int set_flag_from_char(Flag* f, const void* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
54 // a writeable flag setter accepting 'jvalue' values
55 static int set_flag_from_jvalue(Flag* f, const void* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
56
57 // set a boolean global flag
58 static int set_bool_flag(const char* name, const char* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
59 // set a int global flag
60 static int set_int_flag(const char* name, const char* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
61 // set a uint global flag
62 static int set_uint_flag(const char* name, const char* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
63 // set a intx global flag
64 static int set_intx_flag(const char* name, const char* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
65 // set a uintx global flag
66 static int set_uintx_flag(const char* name, const char* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
67 // set a uint64_t global flag
68 static int set_uint64_t_flag(const char* name, const char* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
69 // set a size_t global flag using value from AttachOperation
70 static int set_size_t_flag(const char* name, const char* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
71 // set a boolean global flag
72 static int set_bool_flag(const char* name, bool value, Flag::Flags origin, FormatBuffer<80>& err_msg);
73 // set a int global flag
74 static int set_int_flag(const char* name, int value, Flag::Flags origin, FormatBuffer<80>& err_msg);
75 // set a uint global flag
76 static int set_uint_flag(const char* name, uint value, Flag::Flags origin, FormatBuffer<80>& err_msg);
77 // set a intx global flag
78 static int set_intx_flag(const char* name, intx value, Flag::Flags origin, FormatBuffer<80>& err_msg);
79 // set a uintx global flag
80 static int set_uintx_flag(const char* name, uintx value, Flag::Flags origin, FormatBuffer<80>& err_msg);
81 // set a uint64_t global flag
82 static int set_uint64_t_flag(const char* name, uint64_t value, Flag::Flags origin, FormatBuffer<80>& err_msg);
83 // set a size_t global flag using value from AttachOperation
84 static int set_size_t_flag(const char* name, size_t value, Flag::Flags origin, FormatBuffer<80>& err_msg);
85 // set a string global flag
86 static int set_ccstr_flag(const char* name, const char* value, Flag::Flags origin, FormatBuffer<80>& err_msg);
87
88 public:
89 /* sets a writeable flag to the provided value
90 *
91 * - return status is one of the WriteableFlags::err enum values
92 * - an eventual error message will be generated to the provided err_msg buffer
93 */
94 static int set_flag(const char* flag_name, const char* flag_value, Flag::Flags origin, FormatBuffer<80>& err_msg);
95
96 /* sets a writeable flag to the provided value
97 *
98 * - return status is one of the WriteableFlags::err enum values
99 * - an eventual error message will be generated to the provided err_msg buffer
100 */
101 static int set_flag(const char* flag_name, jvalue flag_value, Flag::Flags origin, FormatBuffer<80>& err_msg);
102 };
103
104 #endif /* SHARE_VM_SERVICES_WRITEABLEFLAG_HPP */
105