Mercurial > hg > graal-jvmci-8
diff src/share/vm/memory/allocation.hpp @ 9088:89e4d67fdd2a
Merge
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Fri, 12 Apr 2013 14:05:42 +0200 |
parents | b8f261ba79c6 83f27710f5f7 |
children | 43223d3f5dcd |
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--- a/src/share/vm/memory/allocation.hpp Fri Apr 12 11:24:56 2013 +0200 +++ b/src/share/vm/memory/allocation.hpp Fri Apr 12 14:05:42 2013 +0200 @@ -611,4 +611,23 @@ void check() PRODUCT_RETURN; }; +// Helper class to allocate arrays that may become large. +// Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit +// and uses mapped memory for larger allocations. +// Most OS mallocs do something similar but Solaris malloc does not revert +// to mapped memory for large allocations. By default ArrayAllocatorMallocLimit +// is set so that we always use malloc except for Solaris where we set the +// limit to get mapped memory. +template <class E, MEMFLAGS F> +class ArrayAllocator : StackObj { + char* _addr; + bool _use_malloc; + size_t _size; + public: + ArrayAllocator() : _addr(NULL), _use_malloc(false), _size(0) { } + ~ArrayAllocator() { free(); } + E* allocate(size_t length); + void free(); +}; + #endif // SHARE_VM_MEMORY_ALLOCATION_HPP