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// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_ALLOCATION_H_
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#define V8_ALLOCATION_H_
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#include "checks.h"
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#include "globals.h"
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namespace v8 {
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namespace internal {
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// Called when allocation routines fail to allocate.
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// This function should not return, but should terminate the current
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// processing.
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void FatalProcessOutOfMemory(const char* message);
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// Superclass for classes managed with new & delete.
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class Malloced {
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public:
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void* operator new(size_t size) { return New(size); }
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void operator delete(void* p) { Delete(p); }
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static void FatalProcessOutOfMemory();
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static void* New(size_t size);
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static void Delete(void* p);
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};
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// A macro is used for defining the base class used for embedded instances.
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// The reason is some compilers allocate a minimum of one word for the
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// superclass. The macro prevents the use of new & delete in debug mode.
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// In release mode we are not willing to pay this overhead.
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#ifdef DEBUG
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// Superclass for classes with instances allocated inside stack
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// activations or inside other objects.
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class Embedded {
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public:
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void* operator new(size_t size);
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void operator delete(void* p);
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};
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#define BASE_EMBEDDED : public Embedded
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#else
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#define BASE_EMBEDDED
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#endif
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// Superclass for classes only using statics.
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class AllStatic {
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#ifdef DEBUG
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public:
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void* operator new(size_t size);
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void operator delete(void* p);
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#endif
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};
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template <typename T>
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T* NewArray(int size) {
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T* result = new T[size];
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if (result == NULL) Malloced::FatalProcessOutOfMemory();
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return result;
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}
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template <typename T>
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void DeleteArray(T* array) {
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delete[] array;
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}
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// The normal strdup functions use malloc. These versions of StrDup
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// and StrNDup uses new and calls the FatalProcessOutOfMemory handler
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// if allocation fails.
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char* StrDup(const char* str);
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char* StrNDup(const char* str, int n);
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// Allocation policy for allocating in the C free store using malloc
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// and free. Used as the default policy for lists.
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class FreeStoreAllocationPolicy {
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public:
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INLINE(static void* New(size_t size)) { return Malloced::New(size); }
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INLINE(static void Delete(void* p)) { Malloced::Delete(p); }
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};
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// Allocation policy for allocating in preallocated space.
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// Used as an allocation policy for ScopeInfo when generating
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// stack traces.
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class PreallocatedStorage {
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public:
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explicit PreallocatedStorage(size_t size);
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size_t size() { return size_; }
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// TODO(isolates): Get rid of these-- we'll have to change the allocator
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// interface to include a pointer to an isolate to do this
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// efficiently.
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static inline void* New(size_t size);
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static inline void Delete(void* p);
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private:
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size_t size_;
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PreallocatedStorage* previous_;
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PreallocatedStorage* next_;
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void LinkTo(PreallocatedStorage* other);
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void Unlink();
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friend class Isolate;
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DISALLOW_IMPLICIT_CONSTRUCTORS(PreallocatedStorage);
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};
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} } // namespace v8::internal
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#endif // V8_ALLOCATION_H_
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