For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.
Allocates memory on a specified alignment boundary (debug version only).
void * _aligned_offset_malloc_dbg( size_t size, size_t alignment, size_t offset, const char *filename, int linenumber );
The size of the requested memory allocation.
The alignment value, which must be an integer power of 2.
The offset into the memory allocation to force the alignment.
Pointer to the name of the source file that requested the allocation operation or NULL.
Line number in the source file where the allocation operation was requested or NULL.
A pointer to the memory block that was allocated or
NULL if the operation failed.
_aligned_offset_malloc_dbg is a debug version of the _aligned_offset_malloc function. When _DEBUG is not defined, each call to
_aligned_offset_malloc_dbg is reduced to a call to
_aligned_offset_malloc_dbg allocate a block of memory in the base heap, but
_aligned_offset_malloc_dbg offers several debugging features: buffers on either side of the user portion of the block to test for leaks, a block type parameter to track specific allocation types, and
linenumber information to determine the origin of allocation requests.
_aligned_offset_malloc_dbg allocates the memory block with slightly more space than the requested
size. The additional space is used by the debug heap manager to link the debug memory blocks and to provide the application with debug header information and overwrite buffers. When the block is allocated, the user portion of the block is filled with the value 0xCD and each of the overwrite buffers are filled with 0xFD.
_aligned_offset_malloc_dbg is useful in situations where alignment is needed on a nested element; for example, if alignment was needed on a nested class.
_aligned_offset_malloc_dbg is based on
malloc; for more information, see malloc.
This function sets
ENOMEM if the memory allocation failed or if the requested size was greater than
_HEAP_MAXREQ. For more information about
errno, see errno, _doserrno, _sys_errlist, and _sys_nerr. Also,
_aligned_offset_malloc validates its parameters. If
alignment is not a power of 2 or if
offset is greater than or equal to
size and nonzero, this function invokes the invalid parameter handler, as described in Parameter Validation. If execution is allowed to continue, this function returns
NULL and sets
For information about how memory blocks are allocated, initialized, and managed in the debug version of the base heap, see CRT Debug Heap Details.
For information about the allocation block types and how they are used, see Types of blocks on the debug heap.
For more compatibility information, see Compatibility in the Introduction.
Debug versions of C run-time libraries only.
Not applicable. To call the standard C function, use
PInvoke. For more information, see Platform Invoke Examples.