1/*
2 * Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef RuntimeFlags_h
27#define RuntimeFlags_h
28
29#include <initializer_list>
30
31namespace JSC {
32
33// macro(name, isEnabledFlag)
34#define JSC_RUNTIME_FLAG(macro)
35
36class RuntimeFlags {
37private:
38 enum RuntimeFlagShiftValue : unsigned {
39#define JSC_DECLARE_RUNTIME_FLAG_SHIFT_VALUE(name, isEnabledFlag) shiftValueFor##name,
40 JSC_RUNTIME_FLAG(JSC_DECLARE_RUNTIME_FLAG_SHIFT_VALUE)
41#undef JSC_DECLARE_RUNTIME_FLAG_SHIFT_VALUE
42 };
43
44public:
45 enum RuntimeFlag : unsigned {
46#define JSC_DECLARE_RUNTIME_FLAG(name, isEnabledFlag) name = 1u << (shiftValueFor##name),
47 JSC_RUNTIME_FLAG(JSC_DECLARE_RUNTIME_FLAG)
48#undef JSC_DECLARE_RUNTIME_FLAG
49 };
50
51#define JSC_DECLARE_RUNTIME_FLAG_ACCESSOR(name, isEnabledFlag) \
52 void set##name(bool value)\
53 {\
54 if (value)\
55 m_flags |= name;\
56 else\
57 m_flags &= (~name);\
58 }\
59 bool is##name() const\
60 {\
61 return m_flags & name;\
62 }
63 JSC_RUNTIME_FLAG(JSC_DECLARE_RUNTIME_FLAG_ACCESSOR)
64#undef JSC_DECLARE_RUNTIME_FLAG_ACCESSOR
65
66 RuntimeFlags()
67 : RuntimeFlags(0u)
68 {
69 }
70
71 RuntimeFlags(std::initializer_list<RuntimeFlag> initializerList)
72 : RuntimeFlags()
73 {
74 for (RuntimeFlag flag : initializerList)
75 m_flags |= flag;
76 }
77
78 explicit RuntimeFlags(unsigned flags)
79 : m_flags(flags)
80 {
81 }
82
83 static RuntimeFlags createAllEnabled()
84 {
85 return RuntimeFlags(
86#define JSC_USE_RUNTIME_FLAG(name, isEnabledFlag) ((isEnabledFlag) ? name : 0u) |
87 JSC_RUNTIME_FLAG(JSC_USE_RUNTIME_FLAG)
88#undef JSC_USE_RUNTIME_FLAG
89 0u
90 );
91 }
92
93private:
94 unsigned m_flags;
95};
96
97} // namespace JSC
98
99#endif // RuntimeFlags_h
100