diff options
Diffstat (limited to 'doc/info')
| -rw-r--r-- | doc/info/chap/memory-allocation.texinfo | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/doc/info/chap/memory-allocation.texinfo b/doc/info/chap/memory-allocation.texinfo index a368aea..141abaa 100644 --- a/doc/info/chap/memory-allocation.texinfo +++ b/doc/info/chap/memory-allocation.texinfo @@ -659,6 +659,25 @@ It is unspecified how the function works. The implemention in @code{slibc} will allocate a bit of extra memory and shift the returned pointer so that it is aligned. + +A recommended practice, to align pointers is: +@example +p = aligned_alloc(sizeof(*p), n) +@end example + +@tpindex max_align_t +@sc{ISO}@tie{}C11 defines the auxiliary data +type @code{max_align_t} which has a size +the guaranteed to be a power-of-two (possibly +1) multiple of the size of any intrinsic data +type defined by the C standard. Its size it +hence suitable for the aligment of any pointer +to such data type. It can thus be a good idea +to try replacing @code{malloc} with the macro +@example +#define malloc(n) \ + aligned_alloc(sizeof(max_align_t), n) +@end example @end table |