src/handles-inl.h
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00001 // Copyright 2006-2008 the V8 project authors. All rights reserved. 00002 // Redistribution and use in source and binary forms, with or without 00003 // modification, are permitted provided that the following conditions are 00004 // met: 00005 // 00006 // * Redistributions of source code must retain the above copyright 00007 // notice, this list of conditions and the following disclaimer. 00008 // * Redistributions in binary form must reproduce the above 00009 // copyright notice, this list of conditions and the following 00010 // disclaimer in the documentation and/or other materials provided 00011 // with the distribution. 00012 // * Neither the name of Google Inc. nor the names of its 00013 // contributors may be used to endorse or promote products derived 00014 // from this software without specific prior written permission. 00015 // 00016 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00017 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00018 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00019 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00020 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00021 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00022 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00023 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00024 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00025 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00026 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 // 00028 00029 #ifndef V8_HANDLES_INL_H_ 00030 #define V8_HANDLES_INL_H_ 00031 00032 #include "handles.h" 00033 #include "api.h" 00034 00035 namespace v8 { namespace internal { 00036 00037 template<class T> 00038 Handle<T>::Handle(T* obj) { 00039 location_ = reinterpret_cast<T**>(HandleScope::CreateHandle(obj)); 00040 } 00041 00042 00043 template <class T> 00044 inline T* Handle<T>::operator*() const { 00045 ASSERT(location_ != NULL); 00046 ASSERT(reinterpret_cast<Address>(*location_) != kHandleZapValue); 00047 return *location_; 00048 } 00049 00050 00051 #ifdef DEBUG 00052 inline NoHandleAllocation::NoHandleAllocation() { 00053 ImplementationUtilities::HandleScopeData* current = 00054 ImplementationUtilities::CurrentHandleScope(); 00055 extensions_ = current->extensions; 00056 // Shrink the current handle scope to make it impossible to do 00057 // handle allocations without an explicit handle scope. 00058 current->limit = current->next; 00059 current->extensions = -1; 00060 } 00061 00062 00063 inline NoHandleAllocation::~NoHandleAllocation() { 00064 // Restore state in current handle scope to re-enable handle 00065 // allocations. 00066 ImplementationUtilities::CurrentHandleScope()->extensions = extensions_; 00067 } 00068 #endif 00069 00070 00071 } } // namespace v8::internal 00072 00073 #endif // V8_HANDLES_INL_H_
