src/share/vm/utilities/globalDefinitions.hpp
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*** old/src/share/vm/utilities/globalDefinitions.hpp	Tue Aug 13 14:15:19 2013
--- new/src/share/vm/utilities/globalDefinitions.hpp	Tue Aug 13 14:15:19 2013

*** 408,417 **** --- 408,419 ---- inline intptr_t align_size_down(intptr_t size, intptr_t alignment) { return align_size_down_(size, alignment); } + #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment))) + // Align objects by rounding up their size, in HeapWord units. #define align_object_size_(size) align_size_up_(size, MinObjAlignment) inline intptr_t align_object_size(intptr_t size) {
*** 426,435 **** --- 428,441 ---- inline intptr_t align_object_offset(intptr_t offset) { return align_size_up(offset, HeapWordsPerLong); } + inline void* align_pointer_up(const void* addr, size_t size) { + return (void*) align_size_up_((uintptr_t)addr, size); + } + // Clamp an address to be within a specific page // 1. If addr is on the page it is returned as is // 2. If addr is above the page_address the start of the *next* page will be returned // 3. Otherwise, if addr is below the page_address the start of the page will be returned inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) {
*** 447,482 **** --- 453,462 ---- // The expected size in bytes of a cache line, used to pad data structures. #define DEFAULT_CACHE_LINE_SIZE 64 // Bytes needed to pad type to avoid cache-line sharing; alignment should be the // expected cache line size (a power of two). The first addend avoids sharing // when the start address is not a multiple of alignment; the second maintains // alignment of starting addresses that happen to be a multiple. #define PADDING_SIZE(type, alignment) \ ((alignment) + align_size_up_(sizeof(type), alignment)) // Templates to create a subclass padded to avoid cache line sharing. These are // effective only when applied to derived-most (leaf) classes. // When no args are passed to the base ctor. template <class T, size_t alignment = DEFAULT_CACHE_LINE_SIZE> class Padded: public T { private: char _pad_buf_[PADDING_SIZE(T, alignment)]; }; // When either 0 or 1 args may be passed to the base ctor. template <class T, typename Arg1T, size_t alignment = DEFAULT_CACHE_LINE_SIZE> class Padded01: public T { public: Padded01(): T() { } Padded01(Arg1T arg1): T(arg1) { } private: char _pad_buf_[PADDING_SIZE(T, alignment)]; }; //---------------------------------------------------------------------------------------------------- // Utility macros for compilers // used to silence compiler warnings

src/share/vm/utilities/globalDefinitions.hpp
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