author | kbarrett |
Sun, 11 Feb 2018 03:12:15 -0500 | |
changeset 48955 | e22914003cf0 |
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child 49465 | 4881673579b7 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP |
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#define SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP |
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||
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#include "runtime/atomic.hpp" |
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#include "runtime/os.hpp" |
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#include "services/memTracker.hpp" |
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#include "utilities/align.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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// Explicit C-heap memory management |
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#ifndef PRODUCT |
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// Increments unsigned long value for statistics (not atomic on MP). |
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inline void inc_stat_counter(volatile julong* dest, julong add_value) { |
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#if defined(SPARC) || defined(X86) |
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// Sparc and X86 have atomic jlong (8 bytes) instructions |
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julong value = Atomic::load(dest); |
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value += add_value; |
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Atomic::store(value, dest); |
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#else |
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// possible word-tearing during load/store |
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*dest += add_value; |
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#endif |
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} |
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#endif |
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// allocate using malloc; will fail if no memory available |
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inline char* AllocateHeap(size_t size, MEMFLAGS flags, |
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const NativeCallStack& stack, |
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
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char* p = (char*) os::malloc(size, flags, stack); |
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if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "AllocateHeap"); |
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} |
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return p; |
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} |
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ALWAYSINLINE char* AllocateHeap(size_t size, MEMFLAGS flags, |
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
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return AllocateHeap(size, flags, CURRENT_PC, alloc_failmode); |
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} |
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ALWAYSINLINE char* ReallocateHeap(char *old, size_t size, MEMFLAGS flag, |
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
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char* p = (char*) os::realloc(old, size, flag, CURRENT_PC); |
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if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "ReallocateHeap"); |
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} |
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return p; |
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} |
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inline void FreeHeap(void* p) { |
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os::free(p); |
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} |
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template <MEMFLAGS F> void* CHeapObj<F>::operator new(size_t size, |
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const NativeCallStack& stack) throw() { |
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return (void*)AllocateHeap(size, F, stack); |
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} |
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template <MEMFLAGS F> void* CHeapObj<F>::operator new(size_t size) throw() { |
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return CHeapObj<F>::operator new(size, CALLER_PC); |
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} |
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template <MEMFLAGS F> void* CHeapObj<F>::operator new (size_t size, |
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const std::nothrow_t& nothrow_constant, const NativeCallStack& stack) throw() { |
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return (void*)AllocateHeap(size, F, stack, AllocFailStrategy::RETURN_NULL); |
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} |
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template <MEMFLAGS F> void* CHeapObj<F>::operator new (size_t size, |
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const std::nothrow_t& nothrow_constant) throw() { |
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return CHeapObj<F>::operator new(size, nothrow_constant, CALLER_PC); |
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} |
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template <MEMFLAGS F> void* CHeapObj<F>::operator new [](size_t size, |
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const NativeCallStack& stack) throw() { |
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return CHeapObj<F>::operator new(size, stack); |
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} |
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template <MEMFLAGS F> void* CHeapObj<F>::operator new [](size_t size) |
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throw() { |
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return CHeapObj<F>::operator new(size, CALLER_PC); |
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} |
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template <MEMFLAGS F> void* CHeapObj<F>::operator new [](size_t size, |
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const std::nothrow_t& nothrow_constant, const NativeCallStack& stack) throw() { |
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return CHeapObj<F>::operator new(size, nothrow_constant, stack); |
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} |
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template <MEMFLAGS F> void* CHeapObj<F>::operator new [](size_t size, |
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const std::nothrow_t& nothrow_constant) throw() { |
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return CHeapObj<F>::operator new(size, nothrow_constant, CALLER_PC); |
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} |
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template <MEMFLAGS F> void CHeapObj<F>::operator delete(void* p){ |
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FreeHeap(p); |
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} |
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template <MEMFLAGS F> void CHeapObj<F>::operator delete [](void* p){ |
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FreeHeap(p); |
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} |
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template <class E> |
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size_t MmapArrayAllocator<E>::size_for(size_t length) { |
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size_t size = length * sizeof(E); |
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int alignment = os::vm_allocation_granularity(); |
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return align_up(size, alignment); |
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} |
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template <class E> |
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E* MmapArrayAllocator<E>::allocate_or_null(size_t length, MEMFLAGS flags) { |
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size_t size = size_for(length); |
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int alignment = os::vm_allocation_granularity(); |
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char* addr = os::reserve_memory(size, NULL, alignment, flags); |
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if (addr == NULL) { |
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return NULL; |
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} |
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if (os::commit_memory(addr, size, !ExecMem)) { |
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return (E*)addr; |
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} else { |
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os::release_memory(addr, size); |
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return NULL; |
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} |
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} |
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template <class E> |
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E* MmapArrayAllocator<E>::allocate(size_t length, MEMFLAGS flags) { |
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size_t size = size_for(length); |
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int alignment = os::vm_allocation_granularity(); |
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char* addr = os::reserve_memory(size, NULL, alignment, flags); |
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if (addr == NULL) { |
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vm_exit_out_of_memory(size, OOM_MMAP_ERROR, "Allocator (reserve)"); |
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} |
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os::commit_memory_or_exit(addr, size, !ExecMem, "Allocator (commit)"); |
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return (E*)addr; |
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} |
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template <class E> |
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void MmapArrayAllocator<E>::free(E* addr, size_t length) { |
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bool result = os::release_memory((char*)addr, size_for(length)); |
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assert(result, "Failed to release memory"); |
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} |
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template <class E> |
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size_t MallocArrayAllocator<E>::size_for(size_t length) { |
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return length * sizeof(E); |
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} |
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template <class E> |
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E* MallocArrayAllocator<E>::allocate(size_t length, MEMFLAGS flags) { |
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return (E*)AllocateHeap(size_for(length), flags); |
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} |
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template<class E> |
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void MallocArrayAllocator<E>::free(E* addr, size_t /*length*/) { |
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FreeHeap(addr); |
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} |
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template <class E> |
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bool ArrayAllocator<E>::should_use_malloc(size_t length) { |
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return MallocArrayAllocator<E>::size_for(length) < ArrayAllocatorMallocLimit; |
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} |
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template <class E> |
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E* ArrayAllocator<E>::allocate_malloc(size_t length, MEMFLAGS flags) { |
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return MallocArrayAllocator<E>::allocate(length, flags); |
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} |
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template <class E> |
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E* ArrayAllocator<E>::allocate_mmap(size_t length, MEMFLAGS flags) { |
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return MmapArrayAllocator<E>::allocate(length, flags); |
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} |
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template <class E> |
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E* ArrayAllocator<E>::allocate(size_t length, MEMFLAGS flags) { |
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if (should_use_malloc(length)) { |
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return allocate_malloc(length, flags); |
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} |
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return allocate_mmap(length, flags); |
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} |
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template <class E> |
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E* ArrayAllocator<E>::reallocate(E* old_addr, size_t old_length, size_t new_length, MEMFLAGS flags) { |
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E* new_addr = (new_length > 0) |
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? allocate(new_length, flags) |
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: NULL; |
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if (new_addr != NULL && old_addr != NULL) { |
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memcpy(new_addr, old_addr, MIN2(old_length, new_length) * sizeof(E)); |
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} |
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if (old_addr != NULL) { |
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free(old_addr, old_length); |
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} |
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return new_addr; |
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} |
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template<class E> |
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void ArrayAllocator<E>::free_malloc(E* addr, size_t length) { |
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MallocArrayAllocator<E>::free(addr, length); |
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} |
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template<class E> |
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void ArrayAllocator<E>::free_mmap(E* addr, size_t length) { |
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MmapArrayAllocator<E>::free(addr, length); |
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} |
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template<class E> |
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void ArrayAllocator<E>::free(E* addr, size_t length) { |
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if (addr != NULL) { |
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if (should_use_malloc(length)) { |
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free_malloc(addr, length); |
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} else { |
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free_mmap(addr, length); |
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} |
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} |
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} |
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#endif // SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP |