--- a/hotspot/src/share/vm/utilities/globalDefinitions.hpp Fri Aug 09 01:39:11 2013 -0700
+++ b/hotspot/src/share/vm/utilities/globalDefinitions.hpp Fri May 31 14:32:44 2013 +0200
@@ -410,6 +410,8 @@
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)
@@ -428,6 +430,10 @@
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
@@ -449,32 +455,6 @@
// 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