1.1 --- a/src/share/vm/memory/allocation.hpp Mon Feb 11 10:31:56 2013 -0800
1.2 +++ b/src/share/vm/memory/allocation.hpp Mon Apr 08 07:49:28 2013 +0200
1.3 @@ -611,4 +611,23 @@
1.4 void check() PRODUCT_RETURN;
1.5 };
1.6
1.7 +// Helper class to allocate arrays that may become large.
1.8 +// Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit
1.9 +// and uses mapped memory for larger allocations.
1.10 +// Most OS mallocs do something similar but Solaris malloc does not revert
1.11 +// to mapped memory for large allocations. By default ArrayAllocatorMallocLimit
1.12 +// is set so that we always use malloc except for Solaris where we set the
1.13 +// limit to get mapped memory.
1.14 +template <class E, MEMFLAGS F>
1.15 +class ArrayAllocator : StackObj {
1.16 + char* _addr;
1.17 + bool _use_malloc;
1.18 + size_t _size;
1.19 + public:
1.20 + ArrayAllocator() : _addr(NULL), _use_malloc(false), _size(0) { }
1.21 + ~ArrayAllocator() { free(); }
1.22 + E* allocate(size_t length);
1.23 + void free();
1.24 +};
1.25 +
1.26 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP
