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 // 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. 15 // 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. 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> 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 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 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
