1 // Copyright 2006-2008 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
4 // met:
5 //
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7 // notice, this list of conditions and the following disclaimer.
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9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
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13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27 //
28
29 #ifndef V8_HANDLES_INL_H_
30 #define V8_HANDLES_INL_H_
31
32 #include "apiutils.h"
33 #include "handles.h"
34 #include "api.h"
35
36 namespace v8 {
37 namespace internal {
38
39 template<class T>
Handle(T * obj)40 Handle<T>::Handle(T* obj) {
41 ASSERT(!obj->IsFailure());
42 location_ = HandleScope::CreateHandle(obj);
43 }
44
45
46 template <class T>
47 inline T* Handle<T>::operator*() const {
48 ASSERT(location_ != NULL);
49 ASSERT(reinterpret_cast<Address>(*location_) != kHandleZapValue);
50 return *location_;
51 }
52
53
54 #ifdef DEBUG
NoHandleAllocation()55 inline NoHandleAllocation::NoHandleAllocation() {
56 v8::ImplementationUtilities::HandleScopeData* current =
57 v8::ImplementationUtilities::CurrentHandleScope();
58 extensions_ = current->extensions;
59 // Shrink the current handle scope to make it impossible to do
60 // handle allocations without an explicit handle scope.
61 current->limit = current->next;
62 current->extensions = -1;
63 }
64
65
~NoHandleAllocation()66 inline NoHandleAllocation::~NoHandleAllocation() {
67 // Restore state in current handle scope to re-enable handle
68 // allocations.
69 v8::ImplementationUtilities::CurrentHandleScope()->extensions = extensions_;
70 }
71 #endif
72
73
74 } } // namespace v8::internal
75
76 #endif // V8_HANDLES_INL_H_
77