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Added function to check if pointer is aligned.

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bkaradzic
2013-08-28 21:40:43 -07:00
parent b3f4baac91
commit 5fe2150bd3
1 changed files with 20 additions and 11 deletions
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31
include/bx/allocator.h
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@@ -34,6 +34,26 @@
namespace bx
{
/// Aligns pointer to nearest next aligned address. _align
inline void* alignPtr(void* _ptr, size_t _extra, size_t _align = BX_CONFIG_ALLOCATOR_NATURAL_ALIGNMENT)
{
union { void* ptr; size_t addr; } un;
un.ptr = _ptr;
size_t unaligned = un.addr + _extra; // space for header
size_t mask = _align-1;
size_t aligned = BX_ALIGN_MASK(unaligned, mask);
un.addr = aligned;
return un.ptr;
}
/// Check if pointer is aligned. _align must be power of two value.
inline bool isPtrAligned(const void* _ptr, size_t _align = BX_CONFIG_ALLOCATOR_NATURAL_ALIGNMENT)
{
union { const void* ptr; size_t addr; } un;
un.ptr = _ptr;
return 0 == (un.addr & (_align-1) );
}
struct BX_NO_VTABLE AllocatorI
{
virtual ~AllocatorI() = 0;
@@ -91,17 +111,6 @@ namespace bx
return _allocator->alignedRealloc(_ptr, _size, _align, _file, _line);
}
inline void* alignPtr(void* _ptr, size_t _extra, size_t _align = BX_CONFIG_ALLOCATOR_NATURAL_ALIGNMENT)
{
union { void* ptr; size_t addr; } un;
un.ptr = _ptr;
size_t unaligned = un.addr + _extra; // space for header
size_t mask = _align-1;
size_t aligned = BX_ALIGN_MASK(unaligned, mask);
un.addr = aligned;
return un.ptr;
}
static inline void* alignedAlloc(AllocatorI* _allocator, size_t _size, size_t _align, const char* _file = NULL, uint32_t _line = 0)
{
size_t total = _size + _align;