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TLHAllocationInterface.hpp
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TLHAllocationInterface.hpp
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/*******************************************************************************
* Copyright IBM Corp. and others 1991
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at https://www.eclipse.org/legal/epl-2.0/
* or the Apache License, Version 2.0 which accompanies this distribution and
* is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following
* Secondary Licenses when the conditions for such availability set
* forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
* General Public License, version 2 with the GNU Classpath
* Exception [1] and GNU General Public License, version 2 with the
* OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] https://openjdk.org/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
*******************************************************************************/
/**
* @file
* @ingroup GC_Base_Core
*/
#if !defined(TLHALLOCATIONINTERFACE_HPP_)
#define TLHALLOCATIONINTERFACE_HPP_
#include "omrcfg.h"
#include "omrcomp.h"
#include "omrmodroncore.h"
#include "ObjectAllocationInterface.hpp"
#include "TLHAllocationSupport.hpp"
class MM_AllocateDescription;
class MM_EnvironmentBase;
class MM_MemoryPool;
class MM_MemorySpace;
class MM_MemorySubSpace;
#if defined(OMR_GC_THREAD_LOCAL_HEAP)
/**
* Object allocation interface definition for TLH style allocators.
* Implementation of the Thread Local Heap allocation style, each thread receiving a per-instance
* version of the type to manage its caches.
* @seealso MM_ObjectAllocationInterface
*/
class MM_TLHAllocationInterface : public MM_ObjectAllocationInterface
{
public:
protected:
private:
MM_EnvironmentBase *_owningEnv; /**< The environment with which the receiver is associated */
MM_TLHAllocationSupport _tlhAllocationSupport; /**< TLH Allocation sub interface class */
#if defined(OMR_GC_NON_ZERO_TLH)
MM_TLHAllocationSupport _tlhAllocationSupportNonZero; /**< TLH Allocation sub interface class */
#endif /* defined(OMR_GC_NON_ZERO_TLH) */
bool _cachedAllocationsEnabled; /**< Are cached allocations enabled? */
uintptr_t _bytesAllocatedBase; /**< Bytes allocated at the start of an allocation request. Relative to _stats.bytesAllocated(). */
public:
static MM_TLHAllocationInterface *newInstance(MM_EnvironmentBase *env);
virtual void kill(MM_EnvironmentBase *env);
virtual void *allocateObject(MM_EnvironmentBase *env, MM_AllocateDescription *allocateDescription, MM_MemorySpace *memorySpace, bool shouldCollectOnFailure);
virtual void *allocateArray(MM_EnvironmentBase *env, MM_AllocateDescription *allocateDescription, MM_MemorySpace *memorySpace, bool shouldCollectOnFailure);
virtual void *allocateArrayletSpine(MM_EnvironmentBase *env, MM_AllocateDescription *allocateDescription, MM_MemorySpace *memorySpace, bool shouldCollectOnFailure);
virtual void *allocateArrayletLeaf(MM_EnvironmentBase *env, MM_AllocateDescription *allocateDescription, MM_MemorySpace *memorySpace, bool shouldCollectOnFailure);
virtual void *allocateTLH(MM_EnvironmentBase *env, MM_AllocateDescription *allocDescription, MM_MemorySubSpace *memorySubSpace, MM_MemoryPool *memoryPool);
virtual void flushCache(MM_EnvironmentBase *env);
virtual void restartCache(MM_EnvironmentBase *env);
virtual uintptr_t getRemainingCacheSize(bool nonZero);
virtual uintptr_t getRefreshCacheSize(bool nonZero);
/* BEN TODO: Collapse the env->enable/disableInlineTLHAllocate with these enable/disableCachedAllocations */
virtual void enableCachedAllocations(MM_EnvironmentBase* env) { _cachedAllocationsEnabled = true; }
virtual void disableCachedAllocations(MM_EnvironmentBase* env) { _cachedAllocationsEnabled = false; };
virtual bool cachedAllocationsEnabled(MM_EnvironmentBase* env) { return _cachedAllocationsEnabled; }
protected:
virtual bool initialize(MM_EnvironmentBase *env);
virtual void tearDown(MM_EnvironmentBase *env);
private:
void reconnect(MM_EnvironmentBase *env);
void *allocateFromTLH(MM_EnvironmentBase *env, MM_AllocateDescription *allocDescription, bool shouldCollectOnFailure);
/**
* Create a ThreadLocalHeap object.
*/
MM_TLHAllocationInterface(MM_EnvironmentBase *env) :
MM_ObjectAllocationInterface(env),
_owningEnv(env),
_tlhAllocationSupport(env, true),
#if defined(OMR_GC_NON_ZERO_TLH)
_tlhAllocationSupportNonZero(env, false),
#endif /* defined(OMR_GC_NON_ZERO_TLH) */
_cachedAllocationsEnabled(true),
_bytesAllocatedBase(0)
{
_typeId = __FUNCTION__;
_tlhAllocationSupport._objectAllocationInterface = this;
#if defined(OMR_GC_NON_ZERO_TLH)
_tlhAllocationSupportNonZero._objectAllocationInterface = this;
#endif /* defined(OMR_GC_NON_ZERO_TLH) */
};
};
#endif /* OMR_GC_THREAD_LOCAL_HEAP */
#endif /* TLHALLOCATIONINTERFACE_HPP_ */