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fix bug discovered by Frank:

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ei_alloc_stack must really return aligned pointers
This commit is contained in:
Benoit Jacob 2008-12-24 13:59:24 +00:00
parent 6f158fb7fc
commit 361225068d
1 changed files with 9 additions and 7 deletions
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16
Eigen/src/Core/util/Memory.h
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@ -139,8 +139,9 @@ inline static int ei_alignmentOffset(const Scalar* ptr, int maxOffset)
}
/** \internal
* ei_alloc_stack(TYPE,SIZE) allocates sizeof(TYPE)*SIZE bytes on the stack if sizeof(TYPE)*SIZE is
* smaller than EIGEN_STACK_ALLOCATION_LIMIT. Otherwise the memory is allocated using the operator new.
* ei_alloc_stack(TYPE,SIZE) allocates an aligned buffer of sizeof(TYPE)*SIZE bytes
* on the stack if sizeof(TYPE)*SIZE is smaller than EIGEN_STACK_ALLOCATION_LIMIT.
* Otherwise the memory is allocated on the heap.
* Data allocated with ei_alloc_stack \b must be freed by calling ei_free_stack(PTR,TYPE,SIZE).
* \code
* float * data = ei_alloc_stack(float,array.size());
@ -149,12 +150,13 @@ inline static int ei_alignmentOffset(const Scalar* ptr, int maxOffset)
* \endcode
*/
#ifdef __linux__
#define ei_alloc_stack(TYPE,SIZE) ((sizeof(TYPE)*(SIZE)>EIGEN_STACK_ALLOCATION_LIMIT) ? \
new TYPE[SIZE] : (TYPE*)alloca(sizeof(TYPE)*(SIZE)))
#define ei_free_stack(PTR,TYPE,SIZE) if (sizeof(TYPE)*SIZE>EIGEN_STACK_ALLOCATION_LIMIT) delete[] PTR
#define ei_alloc_stack(TYPE,SIZE) ((sizeof(TYPE)*(SIZE)>EIGEN_STACK_ALLOCATION_LIMIT) \
? ei_aligned_malloc<TYPE>(SIZE) \
: (TYPE*)alloca(sizeof(TYPE)*(SIZE)))
#define ei_free_stack(PTR,TYPE,SIZE) if (sizeof(TYPE)*SIZE>EIGEN_STACK_ALLOCATION_LIMIT) ei_aligned_free(PTR)
#else
#define ei_alloc_stack(TYPE,SIZE) new TYPE[SIZE]
#define ei_free_stack(PTR,TYPE,SIZE) delete[] PTR
#define ei_alloc_stack(TYPE,SIZE) ei_aligned_malloc<TYPE>(SIZE)
#define ei_free_stack(PTR,TYPE,SIZE) ei_aligned_free(PTR)
#endif
/** \class WithAlignedOperatorNew