v8/src/handles-inl.h

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// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#ifndef V8_HANDLES_INL_H_
#define V8_HANDLES_INL_H_
#include "apiutils.h"
#include "handles.h"
#include "api.h"
namespace v8 {
namespace internal {
template<class T>
Handle<T>::Handle(T* obj) {
ASSERT(!obj->IsFailure());
location_ = HandleScope::CreateHandle(obj);
}
template <class T>
inline T* Handle<T>::operator*() const {
ASSERT(location_ != NULL);
ASSERT(reinterpret_cast<Address>(*location_) != kHandleZapValue);
return *BitCast<T**>(location_);
}
#ifdef DEBUG
inline NoHandleAllocation::NoHandleAllocation() {
v8::ImplementationUtilities::HandleScopeData* current =
v8::ImplementationUtilities::CurrentHandleScope();
// Shrink the current handle scope to make it impossible to do
// handle allocations without an explicit handle scope.
current->limit = current->next;
level_ = current->level;
current->level = 0;
}
inline NoHandleAllocation::~NoHandleAllocation() {
// Restore state in current handle scope to re-enable handle
// allocations.
v8::ImplementationUtilities::HandleScopeData* current =
v8::ImplementationUtilities::CurrentHandleScope();
ASSERT_EQ(0, current->level);
current->level = level_;
}
#endif
} } // namespace v8::internal
#endif // V8_HANDLES_INL_H_