blob: 12162db1fefae1e0caf9a62f7a748a8f6e128e26 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#if !V8_ENABLE_WEBASSEMBLY
#error This header should only be included if WebAssembly is enabled.
#endif // !V8_ENABLE_WEBASSEMBLY
#ifndef V8_WASM_WASM_FEATURES_H_
#define V8_WASM_WASM_FEATURES_H_
// The feature flags are declared in their own header.
#include "src/base/enum-set.h"
#include "src/base/macros.h"
#include "src/wasm/wasm-feature-flags.h"
// Features that are always enabled and do not have a flag.
#define FOREACH_WASM_NON_FLAG_FEATURE(V) \
V(reftypes, "reference type opcodes", true)
// All features, including features that do not have flags.
#define FOREACH_WASM_FEATURE(V) \
FOREACH_WASM_FEATURE_FLAG(V) \
FOREACH_WASM_NON_FLAG_FEATURE(V)
namespace v8 {
namespace internal {
class Context;
template <typename T>
class Handle;
class Isolate;
namespace wasm {
enum WasmFeature {
#define DECL_FEATURE_ENUM(feat, ...) kFeature_##feat,
FOREACH_WASM_FEATURE(DECL_FEATURE_ENUM)
#undef DECL_FEATURE_ENUM
};
// Enabled or detected features.
class WasmFeatures : public base::EnumSet<WasmFeature> {
public:
constexpr WasmFeatures() = default;
explicit constexpr WasmFeatures(std::initializer_list<WasmFeature> features)
: EnumSet(features) {}
// Simplified getters. Use {has_foo()} instead of {contains(kFeature_foo)}.
#define DECL_FEATURE_GETTER(feat, ...) \
constexpr bool has_##feat() const { return contains(kFeature_##feat); }
FOREACH_WASM_FEATURE(DECL_FEATURE_GETTER)
#undef DECL_FEATURE_GETTER
static constexpr const char* name_for_feature(WasmFeature feature) {
switch (feature) {
#define NAME(feat, ...) \
case WasmFeature::kFeature_##feat: \
return #feat;
FOREACH_WASM_FEATURE(NAME)
}
#undef NAME
}
static inline constexpr WasmFeatures All();
static inline constexpr WasmFeatures None();
static inline constexpr WasmFeatures ForAsmjs();
// Retuns optional features that are enabled by flags, plus features that are
// not enabled by a flag and are always on.
static WasmFeatures FromFlags();
static V8_EXPORT_PRIVATE WasmFeatures FromIsolate(Isolate*);
static V8_EXPORT_PRIVATE WasmFeatures FromContext(Isolate*,
Handle<Context> context);
};
// static
constexpr WasmFeatures WasmFeatures::All() {
#define LIST_FEATURE(feat, ...) kFeature_##feat,
return WasmFeatures({FOREACH_WASM_FEATURE(LIST_FEATURE)});
#undef LIST_FEATURE
}
// static
constexpr WasmFeatures WasmFeatures::None() { return {}; }
// static
constexpr WasmFeatures WasmFeatures::ForAsmjs() { return {}; }
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_WASM_WASM_FEATURES_H_
|
