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// Copyright 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_ALLOCATION_H_
#define V8_ALLOCATION_H_
#include "checks.h"
#include "globals.h"
namespace v8 {
namespace internal {
// Called when allocation routines fail to allocate.
// This function should not return, but should terminate the current
// processing.
void FatalProcessOutOfMemory(const char* message);
// Superclass for classes managed with new & delete.
class Malloced {
public:
void* operator new(size_t size) { return New(size); }
void operator delete(void* p) { Delete(p); }
static void FatalProcessOutOfMemory();
static void* New(size_t size);
static void Delete(void* p);
};
// A macro is used for defining the base class used for embedded instances.
// The reason is some compilers allocate a minimum of one word for the
// superclass. The macro prevents the use of new & delete in debug mode.
// In release mode we are not willing to pay this overhead.
#ifdef DEBUG
// Superclass for classes with instances allocated inside stack
// activations or inside other objects.
class Embedded {
public:
void* operator new(size_t size);
void operator delete(void* p);
};
#define BASE_EMBEDDED : public Embedded
#else
#define BASE_EMBEDDED
#endif
// Superclass for classes only using statics.
class AllStatic {
#ifdef DEBUG
public:
void* operator new(size_t size);
void operator delete(void* p);
#endif
};
template <typename T>
static T* NewArray(int size) {
T* result = new T[size];
if (result == NULL) Malloced::FatalProcessOutOfMemory();
return result;
}
template <typename T>
static void DeleteArray(T* array) {
delete[] array;
}
// The normal strdup functions use malloc. These versions of StrDup
// and StrNDup uses new and calls the FatalProcessOutOfMemory handler
// if allocation fails.
char* StrDup(const char* str);
char* StrNDup(const char* str, int n);
// Allocation policy for allocating in the C free store using malloc
// and free. Used as the default policy for lists.
class FreeStoreAllocationPolicy {
public:
INLINE(static void* New(size_t size)) { return Malloced::New(size); }
INLINE(static void Delete(void* p)) { Malloced::Delete(p); }
};
// Allocation policy for allocating in preallocated space.
// Used as an allocation policy for ScopeInfo when generating
// stack traces.
class PreallocatedStorage {
public:
explicit PreallocatedStorage(size_t size);
size_t size() { return size_; }
// TODO(isolates): Get rid of these-- we'll have to change the allocator
// interface to include a pointer to an isolate to do this
// efficiently.
static inline void* New(size_t size);
static inline void Delete(void* p);
private:
size_t size_;
PreallocatedStorage* previous_;
PreallocatedStorage* next_;
void LinkTo(PreallocatedStorage* other);
void Unlink();
friend class Isolate;
DISALLOW_IMPLICIT_CONSTRUCTORS(PreallocatedStorage);
};
} } // namespace v8::internal
#endif // V8_ALLOCATION_H_
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