1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #ifndef V8_APIUTILS_H_
29 #define V8_APIUTILS_H_
32 class ImplementationUtilities {
34 static int GetNameCount(ExtensionConfiguration* that) {
35 return that->name_count_;
38 static const char** GetNames(ExtensionConfiguration* that) {
42 // Packs additional parameters for the NewArguments function. |implicit_args|
43 // is a pointer to the last element of 4-elements array controlled by GC.
44 static void PrepareArgumentsData(internal::Object** implicit_args,
45 internal::Isolate* isolate,
46 internal::Object* data,
47 internal::JSFunction* callee,
48 internal::Object* holder) {
49 implicit_args[v8::Arguments::kDataIndex] = data;
50 implicit_args[v8::Arguments::kCalleeIndex] = callee;
51 implicit_args[v8::Arguments::kHolderIndex] = holder;
52 implicit_args[v8::Arguments::kIsolateIndex] =
53 reinterpret_cast<internal::Object*>(isolate);
56 static v8::Arguments NewArguments(internal::Object** implicit_args,
57 internal::Object** argv, int argc,
58 bool is_construct_call) {
59 ASSERT(implicit_args[v8::Arguments::kCalleeIndex]->IsJSFunction());
60 ASSERT(implicit_args[v8::Arguments::kHolderIndex]->IsHeapObject());
61 // The implicit isolate argument is not tagged and looks like a SMI.
62 ASSERT(implicit_args[v8::Arguments::kIsolateIndex]->IsSmi());
64 return v8::Arguments(implicit_args, argv, argc, is_construct_call);
67 // Introduce an alias for the handle scope data to allow non-friends
68 // to access the HandleScope data.
69 typedef v8::HandleScope::Data HandleScopeData;
72 static void ZapHandleRange(internal::Object** begin, internal::Object** end);
78 #endif // V8_APIUTILS_H_